Radio vb 2006

Radio and Space Science
Annual Report 2006
Dear reader,
You may already have noticed that the format of this annual report has changed,
compared to previous years. This report is thinner and contains fewer facts. On
the other hand it means that you can read it on the bus, in the underground, or
bring it to the beach.
The year of 2006 brought both good and less good news. This is not surprising
and in fact such a statement is valid for any year. Given the way our research is
Gunnar Elgered,
Head of Department.
funded one happy event is when we receive a research grant. Other happy events
are successful Ph.D defences and Licentiate seminars as well as when we get
a paper published in a well spread journal, often summarizing vast amounts of
work.
In this report you will find summary descriptions of the undergraduate and the
Contents
2 Dear reader,
graduate teaching as well as contributions from the research groups and the
3 Public outreach
National Facility for Radio Astronomy – the Onsala Space Observatory. They
present highlights from 2006 and if you want more details of what we have
4 Facts and figures
5 First degree & master’s studies
6 Doctoral studies
carried out, I recommend the papers and reports in the publication list at the
end. On top of that you shall of course also read the Licentiate and Ph.D. theses
produced during the year. Their titles and authors are also presented here. You
7 Dissertations and licentiates
are also welcome to visit our homepage at www.chalmers.se/rss
8 Advanced receiver
development
One group is not explicitly visible in the report: the administrative staff.
They are, of course, involved in most of the activities within the department.
9 Global environmental
measurements
The group is led by Ingrid Eriksson who is also our economy officer.
10 Nonlinear electrodynamics
Margareta Mattson and Paula Rosell are working at the observatory grounds
11 Optical remote sensing
and Eva Axelsson and Monica Hansen in Göteborg.
12 Radar remote sensing
There are of course many other personal achievements that deserve to be men-
13 Radio astronomy
and astrophysics
tioned, but as indicated above, we have decided to make the annual report more
14 Space geodesy
and geodynamics
would simply be to heavy. In spite of this some formal events must be mentioned:
accessible and if all these important contributions should be listed the report
15 Transport theory
16 Onsala space observatory
18 Publications
– Roy Booth was given the Chalmers’ medal for his efforts giving the Onsala
Space Observatory a central role in international collaboration.
– Ingrid Eriksson and Karl-Åke Johansson were honoured in a special
celebration for employees that have served Chalmers for 25 years.
– Pär Strand earned the competence of associate professor (docent).
– Leif Eriksson was employed as assistant professor in Radar Remote Sensing.
– Victor Belitsky was promoted to full professor in Radio and Space Science.
– Arnold van Ardenne was appointed adjunct professor in Radio Astronomy.
Arnold’s main employer is ASTRON in The Netherlands.
– Jan Johansson was appointed as adjunct professor in Space Geodetic
Measurement Techniques. Jan’s main employer is SP Swedish National
Testing and Research Institute.
Happy reading and please do not hesitate to contact us if you are interested in
any of the subjects touched upon in this report. We love to talk about our work
– as well as a few other things that make life interesting and meaningful.
Cover: The Orion Nebula.
(Credit NASA/JPL-Caltech/
T. Megeath University of Toledo).
2
Gunnar Elgered
Head of department
2
Public outreach
Press Clippings
We have developed a technique
using airborne radar to identify wind
thrown forest after the storm Gudrun
– Göteborgs-Posten Jan 9, Uppsalanytt Jan 10,
The Department of Radio and Space Science has a considerable activity
informing the society about ongoing research. It includes visits to schools
and clubs, press releases through Chalmers Public Relations and Press Office,
interviews in the media, as well as receiving visitors to the department.
Metro Jan 11, Västekot, SR Jan 13, Business
Region Göteborg no 0601.
We have developed a technique for
measuring pollution from oil refineries
and petroleum industry in Texas
Some examples:
– Nordiska Industri Projekt 0605, Teknik &
– The annual William Chalmers Lecture was given by Hans Olofsson:
“Hur uppstod livet på jorden och finns det liv på andra ställen i
universum?” (How did life begin on Earth and is there life elsewhere
in the Universe?)
Vetenskap 0605, Civilingenjören 0609,
Process Nordic 0611.
John Black is one of the top 54
Swedish researchers to be quoted in
scientific press – Teknik & Vetenskap
– Cathy Horellou gave a public lecture “The Cosmic Microwave
Background and the 2006 Nobel Prize in Physics”.
no 0602, Tentakel no 4.
Susanne Aalto was elected as working
member of Kungliga Vetenskaps- och
Vitterhets-Samhället
– Around 1400 persons, from a variety of associations representing different
parts of the society visited the Onsala Space Observatory during 2006.
– The Einstein exhibition at Universeum in Göteborg had a GPS receiver
operating demonstrating the effect of general relativity on the estimated
position. The receiver was installed by Jan Johansson.
– Göteborgs-Posten Feb 17.
Hans Olofsson’s seminar entitled
“Is there life in space?” – GöteborgsPosten Nov 6.
Bringing astronomical experiences to the classroom
The subject of the Nobel Prize in
physics is explained by Gustaf
Rydbeck – Göteborgs-Posten Oct 3.
Astronomy is an excellent vehicle for teaching physical sciences to students
at all levels. During 2006, Cathy Horellou and collaborators finished the
first phase of the Swedish contribution to the European Hands-On Universe
(EUHOU ) project to bring astronomical research experiences into school
classrooms. This project, supported by the European Union, delivered a
complete educational package: an internet-accessible radio telescope plus
pedagogical materials to guide its use. The telescope and receiver were
developed in cooperation with staff members of Onsala Space Observatory.
The EUHOU project demonstrated the use of the telescope in classrooms in
Sweden and elsewhere in Europe.
We are participating in calibrating a
Japanese satellite resulting in high
quality pictures of forest
– Skaraborgs Läns Tidning, June 26.
Remningstorp is a forest laboratory
where forest remote sensing is of
world class – SkogsVärden 0604.
John Rösevall is commenting on the
theory that the breaking down of the
ozone layer is no longer increasing,
but has leveled out
Department Council
– Svenska Dagbladet May 4.
The Department Council shall identify and take position on strategic and
comprehensive questions relevant to the activites in the department in
the long term. It shall also support the management of the department.
The council met four times during 2006. One meeting at the Onsala
Space Observatory, with all research group leaders of the department,
was focused on the issue of defining qualitiy in academic work.
Kungsbacka town approved an
application for building a wind power
station close to the observatory,
a decision that the observatory
appealed against, and in the end the
activity is protected and the wind
power is denied building permit
Chairman Göran Netzler
Members:
Hans Andersson, SP Swedish National Testing and Research Institute
Sven Grahn, Swedish Space Corporation
Marie Rådbo, Göteborg University
President’s representative:
Dag Winkler, Microtechnology and Nanoscience, Chalmers
Head of Department:
Gunnar Elgered
Staff’s representatives:
Michael Olberg
Hans-Georg Scherneck
Leif Helldner
Ph.D. students’ representative:
Eva Wirström
Students’ representative:
Erik Steinmetz
Maciej J. Soja
Secretary:
Margareta Mattsson
– Göteborgs-Posten Oct 20, Swedish Radio Nov
27, Kunsbacka Posten Dec 2, Dec 30, Hallands
Nyheter Aug 26, Nov 30, Dec 8, Dec 22.
Ministers agree upon fusion deal.
Seven participating countries build a
new fusion reactor, ITER, in France
– Ny Teknik no 06, Science Business 22 Nov.
Celebration of the anniversary of
the two Swedish satellites Odin and
Viking – News Archives from the Swedish
Space Corporation Feb 22.
3
3
Facts and figures
Chalmers
Foundation 2 %
First degree and
master’s studies 7 %
Income (SEK 1,000)
2006
Research grants
59,578
Research, faculty funding
22,097
First degree and master’s studies
Research,
faculty
funding
24 %
6,788
Other
2,270
Chalmers foundation
1,648
Total
Other 2 %
Research
grants
65 %
92,381
Travel 3 %
Used grants (SEK 1,000)
2006
Personnel
50,346
Internal overhead, IT, etc.
11,350
Fees (APEX , JIVE, etc.)
7,758
Premises
7,504
Other
7,474
Investments
5,119
Travel
2,698
Total
92,249
External funding (SEK 1,000)
Swedish Science Foundation
2006
29,918
European Community
9,936
Swedish National Space Board
8,357
Others
5,799
K A Wallenberg foundation
2,172
Int. organisations ESA , ESO, etc.
1,888
VINNOVA (Swedish Governmental
Agency for Innovation Systems)
Total
Investments 6 %
Other
expenses 8 %
Premises 8 %
Personnel
55 %
Fees (APEX,
JIVE, etc)
8%
Internal
overhead,
IT, etc 12 %
Vinnova 3 %
KA Wallenberg
Foundation 4 %
Others
9%
Swedish
National
Space Board
14 %
1,508
European
Community
17 %
Professors
Professors
9
Adjunct professors
4
Adjunct professors
Associate professors/University lecturers 14
Researchers
Technical staff
16
4
5
39
Associate professors/
University lecturers
Assistant professors
7
16
Ph.D. students
Graduate
students
4
Research engineers
Administrative staff
The Swedish
Research
Council
50 %
59,578
Personnel
Assistant professors
ESA, ESO, etc 3 %
Adminstrative
staff
Research
Technical engineers
staff
Researchers
First Degree
and Master’s Studies
The department is active at several levels of teaching: we give courses for students at Chalmers’
three-year engineering programmes in Electrical Engineering and Computer Engineering, the
five-year master of engineering programmes in
Electrical Engineering, Automation and Mechatronics Engineering, and Engineering Physics,
and we run the international master’s programme
in Advanced Techniques in Radio Astronomy and
Space Science (RAMAS ). We also participate in,
e.g., the Foundation Year at Chalmers, and teach
astronomy at Göteborg University.
In 2006, the department was responsible for 26
courses at Chalmers. Our teachers also participated in a few more courses given by other departments, and gave two basic astronomy courses at
Göteborg University. The subjects range from basic electrical engineering to courses closely related
to our research in, e.g., astrophysics, remote sensing, receiver development, and plasma physics. An
important subject is measurement techniques. We
have our own laboratory which is used exclusively
for teaching and where students get hands-on
experience with measurement instruments.
In addition to giving courses, our teachers also
supervise thesis projects. In 2006, the department
examined 31 master’s thesis projects, and more
than half of them were supervised internally.
In the autumn of 2006, the last students of our
international master’s programme RAMAS started
their studies. Since its start in 2002, RAMAS has attracted students from 23 countries in most parts of
the world. Graduates of the programme are now
pursuing PhD studies at universities in Sweden
and abroad, or work with science and applications
in international organisations and as engineers in
industry.
In 2007, with the reorganisation of Chalmers’ education, RAMAS will be replaced by a new master’s
programme called Radio and Space Science, with
specialisations in Astrophysics, Earth observations and Technology. It will build heavily on the
experiences from RAMAS , but we will strengthen
the remote sensing part and add a specialisation
in astrophysics. Many of our teachers have been
involved in the planning of the new master’s
programme, and we are looking forward to an
interesting 2007.
Magnus Thomasson,
Vice Head of
Department.
Students use equipment at Onsala Space Observatory
to study satellite communication and navigation.
Chalmers courses given 2006
A Foundation Year
Physics, part B
Engineering programmes
Telecommunication
Electrical Engineering
Master of Engineering programmes, year 1–3
Engineering measurements
High frequency electromagnetic waves
Electric circuits
Master’s courses and equivalent
Advanced numerical methods and applications
Astrophysical dynamics ❊
Earth-system science techniques
Environmental measurement techniques
Galaxies ❊
Image processing
Interferometry for astronomy and geodesy
Microwave engineering in communications
MM & subMM receiver technology for instrumentation
Modern cosmology ❊
Plasma physics with applications and fusion
Radar and remote sensing
Radio astrophysics ❊
Remote sensing in environmental science
Satellite positioning
Satellites in communications and navigation
Sensors, signals and systems (measurements part)
Space environment
Space techniques
The interstellar medium ❊
( ❊ = also for Göteborg University students)
Courses at Göteborg University
Astrobiology
The planetary system and space probes
5
Doctoral Studies
Donal Murtagh, Vice
Head of Department.
The doctoral programme is organised as three possible specialisations within the subject area of Radio and Space Science. These specialisations are
Astronomy, Environmental Science and Electrical
Engineering reflecting the diversity of the research
carried out at the department. The school aims to
give the students a thorough understanding of the
research area they have chosen and in depth studies in a particular subject with the aim of achieving
Chalmers’ goals for post-graduate education.
There are currently about 35 research students in
the programme most of whom are employed at the
department although a handful have positions in
industry or at other institutes.
Ph.D. students Yan Zhang and Mattias
Johansson are taking measurements in
order to predict volcano eruption on San
Cristóbal in Nicaragua and on Etna in Italy.
Radar mapping was done on this wind thrown forest after the storm Gudrun.
Ph.D. students Björn Hallberg and Klas Folkesson are inspecting the grounds.
6
Dissertations
Sten Bergstrand
Pontus Johannisson
GPS for Geophysics:
Glacial Isostatic
Adjustment and Tests of
Ionospheric Models.
February
Nonlinear Intrachannel
Distortion in HighSpeed Optical
Transmission Systems.
September
Miroslav Pantaleev
Håkan Smith
Radioastronomy
Instrumentation for
Herschel and APEX
Projects.
May
Runaway Electrons and
Alfvén Eigenmodes in
Tokamaks.
December
Licentiates
Erik Sundin
Evert Olsson
Development of Cryogenic
Low Noise 4-8 GHz HEMT
Amplifier and its Advanced
Characterization.
February
A High Resolution
Study of the LINER Galaxy
NGC 5218.
June
Eva Wirström
Mattias Ekström
Studies in Molecular
Astrophysics and
Astrobiology.
March
Sub-Millimetre
Measurements
of Upper Tropospheric
Humidity.
June
Marco Forzati
John Rösevall
A Study of Polar Ozone
Depletion in the Lower
Stratosphere – Dynamic
Assimilation of O3 and N2O
data from Odin/SMR and
ENVISAT/MIPAS .
October
The Alternate-Phase ReturnTo-Zero Modulation Format
in High-Speed Optical-Fibre
Communications.
March
Maria Buyanova
Multipactor Discharge:
Theoretical Analysis and
Numerical Simulations.
June
Carina Persson
Molecular Astrophysics in
Star-Forming Regions
with the Odin Satellite.
November
Camilla Granström
Site-Dependent Effects in
High-Accuracy Applications
of GNSS .
June
7
Advanced Receiver
Development
Research group leader
Victor Belitsky.
The Group for Advanced Receiver Development (GARD ) is part of the
National Facility for Radio Astronomy, Onsala Space Observatory, and it
develops state of the art radio astronomical receivers at millimetre and
submillimetre wavelenghts. The major work on the facility heterodyne
receiver for the Atacama Pathfinder Experiment Project (APEX ) is now
nearing its completion, and the work on the 183 GHz receivers for the
Atacama Large Millimeter Array (ALMA ) has started.
During 2006 GARD continued their work on
APEX , where it has the responsibility to design and
build a 4-channel facility heterodyne receiver. After
a period of research and development, the desirable performances of APEX Band 1, a sidebandseparation (2SB ) receiver for the 211-275 GH z,
and APEX Band 2, a 2SB receiver for the 275-370
GH z band, were finally achieved. These results are
20m telescope; the receiver is currently under
integration, and it will be installed at the telescope
during the spring 2007 bringing a state of the art
3mm receiver to Onsala. Work with a new highgap superconducting material Nb3 Al has started.
The first results of this project, supported by The
Swedish Research Council (VR ), give hope that
Superconductor-Insulator-Superconductor (SIS )
in line with the best results achieved worldwide
to date. The work continues on the remaining two
channels, and the complete receiver is expected to
be ready for installation at the telescope during the
first half of 2007. GARD has also performed final
tests with a new 3mm 2SB receiver for the Onsala
and Hot Electron Bolometer (HEB ) mixer technologies can be pushed to even higher frequencies
(into the TH z regime). Finally, GARD has started
the development work on the 183 GHz receiver
for ALMA , the largest international radio astronomy instrumentation project.
Staff
The APEX facility
receiver. 4 K plate
with APEX Band 1,
Band 2 and Band 3
receivers integrated.
Victor Belitsky
Vincent Desmarais
Sven-Erik Ferm
Mathias Fredrixon
Doug Henke
Igor Lapkin
Denis Meledin
Håkan Millqvist
Alexey Pavolotsky
Erik Sundin (Mar-)
Magnus Svensson
Vessen Vassilev
Ph.D. students
Bhushan Billade (Dec-)
Dimitar Dochev
Olle Nyström
Miroslav Pantaleev
(-Jun)
Raquel Rodriguez Monje
Erik Sundin (-Feb)
8
Global Environmental
Measurements
The group has mainly concentrated on the production and exploitation of data
from the Swedish led Odin satellite project. Odin was launched in February
2001 and is still producing valuable data several years past its designed
lifetime. The data are used for studies of the ozone layer as well as climate.
Data assimilation
Data from the Odin satellite are assimilated into
a wind driven dynamic model allowing us to have
a detailed picture of the state of the atmosphere
at any given time. The model uses a variant of the
well known Kalman filter to weigh in new data in
an optimal manner and to track the uncertainties
in the model values. The model can also be used
to estimate the extent and distribution of ozone
loss during the winter/spring period when chlorine
chemistry destroys ozone.
Stratospheric Nitrogen dioxide
The optical instrument OSIRIS (Optical Spectrograph and InfraRed Images System) onboard
Odin, measures scattered sunlight through
the Earth’s limb. OSIRIS provides near global
measurements of stratospheric ozone, nitrogen
dioxide (NO2), O Cl O, Br O and aerosols with a
vertical resolution of around 2 km. These species
play a crucial role in the complex ozone depletion
(ozone hole) chemistry and are also important for
studies of global warming. The OSIRIS data set is
unique, especially for NO2 where there is a clear
lack of data with both high vertical and latitudinal resolution combined with high sensitivity and
accuracy. The OSIRIS NO2 data product has been
developed in cooperation between Chalmers and
York University in Toronto. All data from 2002 to
2005 have been analyzed and a monthly climatology, the first of its kind, created. The results have
been compared to simulated measurement from a
French chemical transport model (REPROBUS ).
OSIRIS and the model show generally good agreement but there are also regions where the model
Research group leader
Donal Murtagh.
is significantly underestimating the measured
concentrations, indicating that our knowledge of
the stratospheric nitrogen chemistry is incomplete.
Further research will hopefully reveal and diagnose these model weaknesses in order to better
understand the stratospheric chemistry and the
issue of ozone depletion.
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Donal Murtagh
Joakim Möller
Joachim Urban
Ph.D. students
Samuel Brohede
Ashley Jones
An off-line inversion method has been developed
to retrieve upper tropospheric humidity and cloud
information from the atmospheric Odin submillimetre radiometer (SMR ) observations. Originally intended for observations of stratospheric/
mesospheric trace-gases, Odin-SMR has sensitivity
down to around 10 km. These new inversions rely
on far-wing absorption of the 557 GHz line and
include a method to detect and retrieve ice clouds.
The results are
2005−03−09
2005−03−09
humidity at two altitude layers, 12 and
15 km, and cloud ice
content above 12
km. These two constituents, both strong
agents in the Earth’s
radiation balance,
are today not very
well known and reliable measurements
are important contributions to studies of
the Earth’s climate
system.
John Rösevall
Bengt Rydberg
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Ozone loss during the
Northern hemisphere
winter 2005-2006
%
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Peter Forkman
Mattias Ekström
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Patrick Eriksson
Upper tropospheric humidity
for climate studies
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Staff
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9
Average relative
humidity at an
altitude of 12.2 km
for time period
2002-2006.
Retrieval of
observations
from Odin-SMR
501 GHz band.
%
0
0
−10
−10
−20
−20
−30
−30
−40
−40
−50
−50
Nonlinear
Electrodynamics
The research activity of the Nonlinear Electrodynamics Group
is directed towards three different research areas: the physics
of burning fusion plasmas, nonlinear optics, and microwave
discharge phenomena. There is a common denominator
between these three areas – all involve electromagnetic field
theory, plasma theory, and similar nonlinear wave phenomena.
Nonlinear optics
Research group leaders
Dan Anderson and
Mietek Lisak.
Staff
Dan Anderson
Tünde Fülöp
Mietek Lisak
Ph.D. students
Maria Buyanova (-Jun)
Marco Forzati
(industrial student)
Pontus Johannisson
(-Nov)
Patrik Sandquist
The coherence of laser light has been considered a
crucial property for the appearance of many nonlinear optical phenomena. However, it was recently demonstrated experimentally that many of these
phenomena persist also for partially coherent light.
This result has inspired much subsequent research
on the effects of partial coherence on nonlinear
wave dynamics. The group has contributed to this
development by a new fundamental formalism for
describing the propagation of partially coherent
light in nonlinear media. This formalism has also
been used to analyze the existence and stability of
partially coherent solitons and vortices in nonlinear optical media and to study the effect of partial
coherence on different nonlinear instabilities e.g.
the modulational and collapse instabilities.
Håkan Smith
The signal power [au].
0.8
Richard Udiljak
0.7
Propagation distance [au]
0.6
0.5
It involves collaboration between EU , Japan,
Russia, China, South Korea, USA , and India. The
activity of the Nonlinear Electrodynamics Group
concerns theoretical investigations of fusion plasma
processes in magnetically confined systems and is
strongly integrated in the European fusion collaboration. During 2006 the research work has been
devoted to the physics of burning fusion plasmas
in tokamaks with particular interest given to the
investigation of: (i) fast particle collective effects in
fusion plasmas, (ii) electron runaway in tokamaks,
and (iii) edge plasma transport phenomena in
tokamaks.
0.4
Microwave breakdown in space borne
radio frequency (RF) equipment
0.3
0.2
0.1
Result of a numerical
simulation showing
the breakdown plasma
around a sharp corner
in a wave guide.
Schematic
picture of
the ITER
experiment.
0
−10
−8
−6
−4
−2
0
Time [au]
2
4
6
8
Example of manipulation of light
by light – “the optical axe”. A high
intensity control pulse splits a
signal pulse into two parts.
Burning fusion plasmas
Due to the remarkable success of the European
fusion energy experiment JET in England, the
world fusion community is now taking the “Next
Step” by constructing a large device, which will
produce burning plasmas under reactor relevant
conditions. This prototype reactor – ITER – will
be built in Cadarache, France and is designed to
produce 500 MW of thermonuclear power.
10
10
The power levels needed for space communications are becoming successively higher and tend
to increase the risk of causing electric discharges,
which may seriously deteriorate signal transmission and even damage the RF components. Today’s
microwave applications involve complications in
terms of design geometry and time variation of
the RF power for which a satisfactory theoretical
as well as experimental picture of the microwave
breakdown phenomenon is lacking. A broad
research work is carried out on different aspects of
microwave breakdown by the Nonlinear Electrodynamics Group in collaboration with, in particular,
the French Space Agency – CNES in Toulouse and
Institute of Applied Physics in Nizhny Novgorod,
Russia. The range of this work stretches from space
borne RF communication equipment to ground
based base stations for telephone communication.
Optical Remote Sensing
The optical remote sensing group is working with the development and
application of ground-based optical remote sensing methods for atmospheric
measurements. In specific we are focusing on tailoring instruments and
measurement strategies to address specific measurement problems related to
environmental research and monitoring needs. The work is very international
and field oriented, and spans a large variety of disciplines covering: volcanic
gas measurements, industrial hydrocarbon emissions, atmospheric chemistry
in megacities in developing countries, emissions of climate gases from different
ecosystems, emission from ship and aircraft, methane emissions from landfills,
stratospheric ozone depletion and satellite validation.
Research
group leader
Bo Galle.
Staff
Bo Galle
Johan Mellqvist
Volcanic gas measurements
Since 2001 we are strongly involved in developing
methods to quantify gas emission from active volcanoes. The EU -project NOVAC (Network for Observation of Volcanic and Atmospheric Change),
coordinated by Chalmers, was initiated in fall 2005.
This project aims at establishing a network of instruments for gas measurements on 20 of the most
active volcanoes in the world. In addition to measure volcanic gas emissions for geophysical research
and risk assessment, the instruments will also provide information on atmospheric composition for
research related to stratospheric ozone depletion
and climate change. During 2006 focus has been on
developing the final prototype of the instrument,
measurement strategies, evaluation software, data
communication and archiving routines.
Urban air monitoring in
megacities in developing countries
Recent development of spectroscopic instrumentation, computers and evaluation algorithms, has
paved the way for an exploitation of optical
remote sensing for cost-effective studies of air pollution in megacities. One major activity conducted
during spring 2006 was to participate in the large
international field campaign MCMA -2006 in and
around Mexico City. The purpose of this large campaign, which comprised teams from Mexico, USA
and Europe, was to study the origin and fate of air
pollution as well as outflow and regional impact.
Emissions from ship
instrument that can automatically check the emission from various ship in for example a harbour.
Dan Ohlsson
Atmospheric ozone depletion
and satellite validation
Anders Strandberg
Since 1994 we are operating a high resolution
FTIR (Fourier Transform Infra Red) for solar
Niklas Berg
spectroscopy at Harestua in southern Norway.
The instrument is part of NDACC (Network
for the Detection of Atmospheric Composition
Change), and its main purpose has been to study
the composition of the atmosphere, as well as satellite validation and validation of global chemical
transport models. The emphasis of the measurements is to study the chlorine trend in the stratosphere but also to derive tropospheric molecules,
primarily those related to climate change research.
This work has been conducted under the EU project HYMN .
Claudia Rivera Cardenas
Jerker Samuelsson
David Simpson
Ph.D. students:
Mattias Johansson
Elisabeth Undén (Sep-)
Yan Zhang
Industrial hydrocarbon emissions
Emission of hydrocarbons from various industrial
activities, as well as from storage and shipping,
constitutes an important environmental problem.
We have developed a method for quantification of hydrocarbon emissions based on IR Solar
Occultation. During 2004-2005 this method has
been intensively developed and tested in a project
together with the industries in the Göteborg area.
During 2006 we participated in a major field campaign in Houston, USA , with the aim to quantify
hydrocarbon emissions from refineries and petrochemical industries in southern Texas.
A special measurement strategy using solar occultation spectroscopy has been developed for quantifying real emissions from ship and aircraft. During
2004- 2005 the method has been tested in several
field-campaigns in and outside Göteborg harbour.
Based on these results a new project was started
in the beginning of 2006 aiming at developing an
operative method to identify “gross-polluters”
from an airborne platform, as well as to provide an
NOVAC instrument
installed at San
Cristóbal volcano in
Nicaragua.
Solar occultation
flux measurements
in the Houston ship
channel.
11
Radar Remote Sensing
Research
group leader
Lars Ulander.
Research in the Radar Remote Sensing Group is based on understanding
of radar system properties, allowing us to analyse and design new
systems with improved measurement accuracy. The main applications
studied in the group are forestry and mapping of sea ice. For forests the
goal is to retrieve biomass and changes caused by deforestation, storms,
replanting, etc. Global mapping is required to understand the role of
forest in the global carbon cycle, and hence their effects on global climate
change. Sea ice mapping is also of interest for climate studies since the
ice cover is a good indicator of climate change, as well as affecting the
transfer of energy between the oceans and atmosphere.
Staff
Work and results from 2006
Jan Askne,
prof. emeritus
In January 2006 the Japanese satellite ALOS
(Advanced Land Observing Satellite) was
launched. The Radar Remote Sensing Group participated in the calibration and validation of one
of ALOS sensors, the Phased Array type L-band
Synthetic Aperture Radar (PALSAR ). Four fivemeter large trihedral reflectors and three smaller
dihedral reflectors were deployed as calibration
targets at the Remningstorp forest estate in
Southern Sweden. The work was conducted in
cooperation with the Japanese Aerospace Exploration Agency (JAXA ) and showed that PALSAR produces images of high quality. This led to
the decision to declare ALOS as operational in
October 2006.
Leif Eriksson
Gustaf Jansson
Gary Smith-Jonforsen
Lars Ulander
Ph.D. students:
Klas Folkesson
Björn Hallberg
Annelie Wyholt
Images from ALOS will be used for investigating
and developing forestry applications. One of the
applications is detection and mapping of changes
in the forest cover. As a part of this effort, a large
experiment was conducted in Remningstorp. In
August all trees in four areas, each about 1.4 ha,
were cut down and left on the ground to simulate storm damage. Satellite images from ALOS
PALSAR were collected before and after the
cutting. In addition, airborne synthetic aperture
radar data from the CARABAS and LORA systems – developed and operated by the Swedish
One of the 5 meter tall corner
reflectors that were used in the calibration
campaign for the Japanese ALOS satellite.
12
Defence Research Agency – were acquired. These
systems operate with wavelengths in the range
60 cm to 15 m and generate images with a much
higher resolution than the satellite images. Both
LORA and CARABAS show a good potential for
mapping of storm damaged forest. In December
all trees were removed and new PALSAR images
were acquired to capture the clear-cut phase. The
experiment was in large parts financed by the
Hildur and Sven Wingquist Foundation and the
work was performed in close cooperation with the
Department of Forest Resource Management at
the Swedish University for Agricultural Sciences
and the Department of Radar Systems at the
Swedish Defence Research Agency.
Another important application is estimation of
tree biomass in forests. Methods for stem volume
estimation are being analysed both for satelliteand airborne radar sensors. Topographic effects is
one of the problems that can reduce the estimation
accuracy. To quantify these effects electromagnetic
models for scattering of the radio waves have been
developed. Synthetic-aperture radar uses advanced
signal processing algorithms to generate imagery
from raw radar data as well as to analyse the
resulting imagery. In 2006, the group was involved
with projects developing and evaluating algorithms
for autofocus as well as image segmentation.
Radar images from LORA before (left) and after (right)
the simulated storm felling. Both images were acquired
with a flight direction of 35º. The trees were felled in two
different directions, 35º and 80º. The area where trees
lie parallel to the flight direction gives a much brighter
response than the area with trees in the 80º direction.
Radio Astronomy
and Astrophysics
Our research interersts in radio astronomy and astrophysics range from
comets and stars to galaxies and the large-scale structure of the universe.
Our researchers make use of facilities worldwide and in space, including the
telescopes at Onsala Space Observatory, the APEX telescope in Chile, the
James Clerk Maxwell Telescope in Hawai’i, the European and global Very Long
Baseline Interferometry (VLBI ) networks, interferometers in France, UK and USA ,
the Odin satellite, and the Hubble Space Telescope. Theoretical research is also
carried out by some group members, who develop and use state-of-the-art
numerical tools to simulate the origin and growth of structure in the universe.
Research group
leader John Black.
NGC 5218: a supermassive black hole,
a starburst, or both ?
Very-long-baseline interferometry
and radio supernovae
Staff
Some galaxies show evidence of very active central regions, but it is difficult to be sure whether
the compact power source is the accretion onto a
supermassive black hole or a high concentration
of star-forming activity. In order to decide this
question for the galaxy NGC 5218, Evert Olsson,
his supervisors Susanne Aalto and Magnus
Thomasson, and their collaborators in the UK
and Germany completed a high-resolution study
of several different types of radio emission.
The measurements of atomic hydrogen and of
several molecules (CO , HCN , and HCO +) traced
the motions of neutral gas in relation to the ionized gas in the central region of NGC 5218. There
is evidence of an expanding shell of 70 million
solar masses of molecular gas, which supports
the suggestion that the activity in NGC 5218 is
powered mainly by a burst of star formation
within the last 10 million years.
Rodrigo Parra and his supervisor, John Conway,
demonstrated the enormous potential of ultra wide
band VLBI by reporting the detection of expanding remnants of recent supernova explosions in the
ultraluminous galaxy Arp 220. This discovery made
use of the first observations of the European VLBI
Network at its new maximum data rate of 1 gigabit per second. Follow-up VLBI imaging at four
different frequencies made it possible to measure
the spectra of 18 sources, which could be divided
into two groups of young supernovae (less than
10 years) and older supernova remnants (greater
than 30 years). In combination with older data
spanning 10 years, Parra et al. have estimated the
rate of appearance and luminosity of new supernova explosions in Arp 220. These studies provide
important insight into the remarkable activity in
the center of Arp 220, where the star-forming environment is so extreme that the rapid evolution of
massive stars is radically different from that in our
own Milky Way Galaxy.
John Black
Chemistry and cosmology
Roy Booth,
prof. emeritus
John Conway
Arto Heikkilä
Åke Hjalmarson
Cathy Horellou
Henrik Olofsson
Alessandro Romeo
Gustaf Rydbeck
Magnus Thomasson
Tommy Wiklind
Anders Winnberg,
prof. emiritus
Ph.D. students
Rossa Hurley
Daniel Johansson
Evert Olsson
Rodrigo Parra
Carina Persson
Eva Wirström
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John Black published results of a computation of primordial chemistry. This
model predicts that the small amount
of the hydrogen anion formed since the
epoch of recombination in the early universe may produce a small, but measurable distortion of the spectrum of the
cosmic background radiation, which is
otherwise a nearly perfect blackbody.
Susanne Aalto
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Three-colour VLBI image of the supernova remnants in the western nucleus of
the galaxy Arp 220. Red, green, and blue colours represent the brightnesses
at frequencies of 2.3, 5.0, and 8.3 GHz, respectively. The width of the image
corresponds to approximately 100 parsecs or 300 light-years.
13
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Space Geodesy and
Geodynamics
Research
group leader
Rüdiger Haas.
Staff
Willgodt Bokhede
Gunnar Elgered
Rüdiger Haas
Jan Johansson
Hans-Georg Scherneck
Ph.D. students
Sten Bergstrand (-Feb)
Camilla Granström (-Jun)
Martin Lidberg
Tobias Nilsson
Surat Pramualsakdikul
Carsten Rieck
(industrial student)
We use space geodetic techniques and microwave radiometry for basic research
of geodynamical phenomenon and atmospheric processes. The range of research
topics includes Earth rotation variations over sub-diurnal to decadal time scales,
terrestrial reference frames, inter- and intra-plate tectonic motions, crustal
deformation due to oceanic and atmospheric loading, glacial isostatic adjustment,
distribution and variation of atmospheric water vapour for short term applications
such as weather forecasting as well as long term climate monitoring and research.
Earth rotation variations
on various time scales
We analyse geodetic Very Long Baseline
Interferometry (VLBI ) observations to derive
accurate information about Earth orientation and rotation. The figure shows a wavelet
decomposition of the length of day derived
from geodetic VLBI and reveals the signatures
of global-scale mass redistribution processes
on various time scales. Among them is the so
called El-Nino phenomena with an approximate period of a few years.
Wavelet decomposition of the length-of-day
derived from geodetic VLBI observations.
Global Navigation Satellite
System (GNSS ) for geosciences
We use dense GNSS networks with
receiving stations of geodetic quality
to investigate the deformation of the
Earth’s crust and the distribution of
atmospheric water vapour. The dominating GNSS today is the US owned
Global Positioning System (GPS ). The
map shows the GPS derived vertical and horizonal crustal motion in
Fennoscandia as color-coded iso-lines
and vectors, respectively. The observed
crustal motions enable us to derive the
viscosity in parts of the Earth’s mantle.
A typical GNSS
receiving station of
high geodetic quality
( SWEPOS station
Vilhelmina).
Horizontal (vectors)
and vertical (colorcoded iso-lines)
crustal deformation
in Fennoscandia as
derived from GPS
observations.
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–6
–4
–2
0
2
4
6
8
10
12
14
We also use the GPS observations to
derive the amount of atmospheric water vapour with high temporal and spatial resolution. Tomographic methods
for estimation of the 3D distribution
of water vapour, using dense groundbased GPS networks, have been
assessed during 2006. We have also
established a Nordic GPS data analysis
centre at SMHI for the application of
assimilation of measurements of the
atmospheric water vapour content in
numerical weather prediction models.
Transport Theory
The group performs research on turbulent transport in magnetized toroidal
plasmas with application to thermonuclear fusion research. Main topics
include fluid closure, inward “pinch” fluxes and transport barriers.
New tests of our transport model
Our model for turbulent transport includes a possible heat pinch. The tests of this heat pinch in the
model has continued for ASDEX -Upgrade data.
The model has given good agreement for the average temperature while harmonics of a modulation
did not extend sufficiently far in space.
The model has continued to give good results in
comparisons with experiment in connection with
our work under the EFDA - JET 2006 programme.
These results have been mainly on transport of
toroidal momentum where our particular nonMarkovian mixing-length rule for saturation has
lead to good results for the ratio of momentum
and ion temperature diffusivities. The destabilization of ITG modes as a function of temperature
ratio was in good agreement with our model for
quiescent H-modes with double transport barriers.
ITPA
We have participated in the ITPA Transport and
ITB and Confinement, Modeling and Database
topical groups in Princeton, where results on
momentum transport were presented and outlines
were made for model testing.
Momentum transport
A new version of our transport model with
transport of poloidal and toroidal momentum
included has been developed during 2005 and
modified during 2006. This model also includes the
nonlinear generation of flows (zonal flows) by the
turbulence. This effect is particularly strong with
our closure. During 2006 extensive work has been
done on simulations of momentum transport.
resonances to our model. The result was that
the particle pinch was strongly reduced and the
peaked experimental density profile in a JET shot
could not be supported.
We have also studied transport of impurity ions
for ITER -like data, comparing turbulent and
neoclassical transport. These studies were made in
collaboration with the Nonlinear Electrodynamics
group.
Parallel to the predictive simulations we have
improved the model by developing the basic drift
wave theory. The most recent results are on particle pinches, effects of magnetic shear on electron
trapping, statistical theory of turbulent transport in
magnetized plasmas and fluid closure.
Fluid closure
A plenary invited talk was given at the International Conference on Plasma Physics in Kiev with
a main part devoted to the fluid closure. It related
to our results on zonal flows to those of Particle In
Cell (PIC ) codes and relating the simple coherent
Mattor-Parker system (where our closure works
well) to more general systems. In the journal
article (conditionally accepted) from this talk this
has been taken one step further by showing the
mathematical equivalence of the Mattor-Parker
system and renormalized turbulent systems. Within
this field we have also started an investigation of
effects of the fluid closure on resistive wall modes.
This is a problem within global stability and is
done in collaboration with Yueqiang Liu who has
just joined our group.
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Anders Jarmén
Bhanpersad Jhowry
Hans Nordman
Pär Strand
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Ph.D. students
Annika Eriksson
Abhinav Gupta (Sep-)
(industrial student)
ASDEX
Axially Symmetric
Divertor EXperiment
EFDA
European Fusion
Energy Development
Agreement
JET
Joint European
Torus in Abingdon,
England
ITG
Ion Temperature
Gradient
ITPA
International
Tokamak Physics
Activities
ITB
Internal Transport
Barrier
Results from
predictive simulation
of temperatures and
toroidal momentum in
JET discharge 57871
using the model for
turbulent transport
developed at Chalmers.
The well reproduced
experimental profiles
also correspond to a
Prandtl number (ratio
of momentum and ion
heat diffusivity) in good
agreement with the
experiment.
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Staff
Jan Weiland
Theory
Particle transport
A very interesting feature of particle transport
is the possibility of particle pinches. These could
strongly improve the performance of the prototype reactor ITER . During 2006 we have investigated effects of fluid closure on particle pinches.
Our fluid closure is presently the model with the
strongest particle pinches. It has recently been
found that kinetic models without nonlinearities
that can counteract linear wave particle resonances, can not support the steep density profile in
Ohmic JET shots. However, our model has been
successful in simulating such shots. In order to
investigate this we have added kinetic “gyrofluid”
Research group
leader Jan Weiland.
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15
Onsala Space Observatory
Director
Hans Olofsson.
Onsala Space Observatory is the Swedish National Facility for Radio Astronomy.
The observatory operates two telescopes in Onsala, a 25 metre diameter cmwave telescope and a 20 metre diameter mm-wave telescope, and is one of
three partners in Atacama Pathfinder Experiment (APEX ), a new submillimetre
telescope in Chile. Together with the Department of Radio and Space Science, the
observatory is also in charge of the scientific investigations with the Odin satellite.
The Onsala telescopes
The Onsala 20 m telescope is continuously upgraded. In 2006, the antenna drive and control system
was completely replaced. The receiver tuning is now
quite automatic and can easily be done remotely.
The bands 21- 26 GH z and 36 -50 GH z of the broadband (18 - 50 GH z) receiver were upgraded to dual
polarization. Finally, the radome enclosing the 20 m
telescope was painted during the summer of 2006,
in order to prolong its lifetime and prevent water
from leaking into the radome panels.
Close to twenty single-dish projects were scheduled
on the 20 m telescope during 2006, ranging from
investigations of mass-loss from old stars, through
studies of turbulence in interstellar clouds, to
searches for molecules in active galactic nuclei.
The observatory is a member of the large EU
funded network RadioNet. Its Trans-National
Access programme supports European astronomers’ use of the Onsala 20 m telescope and the
European VLBI Network. The observatory has
also participated in the RadioNet research activity AMSTAR , a project to develop high-frequency
receivers; in particular the development of the
APEX facility heterodyne receiver has benefited
from this.
Water vapour radiometer for ALMA
Radio waves are affected by water vapour in the
Earth’s atmosphere, which distorts astronomical
images made from radio interferometer data.
To compensate for this, the varying amount of
water vapour along the line-of-sight from each
radio telescope in the interferometer has to be
measured. To this end, a water vapour radiometer
has been developed by Onsala Space Observatory for use at ALMA (Atacama Large Millimetre Array), a large international radio interferometer with 50 radio telescopes to be built in the
Atacama desert in the Chilean Andes. It has been
successfully tested at the Submillimetre Array
on Hawaii. The Onsala Dicke-switch design was
chosen in competition with other designs. Fifty
radiometers will be produced for the ALMA
observatory.
Observations with APEX
The APEX telescope
in Chile.
Much of the VLBI (Very Long Baseline Interferometry) activities during 2006 were focussed
on continued development of eVLBI for the astronomical and space-geodesy communities (e denotes the use of the Internet for transfer of data).
In eVLBI , data can be sent directly in real-time
from telescopes in different countries to the central
correlator over the Internet (instead of being
recorded on hard discs), something which requires
high-capacity optical fibre connections.
The observatory is part of the EU funded project
EXPR eS , aiming at reaching a real-time 16 telescope capability at 1 Gigabits per second data
transfer to the correlator in The Netherlands.
16
The first observing season with the APEX
telescope has been successfully completed. The
editors of the scientific journal Astronomy & Astrophysics recognised the importance of this and
published a special issue on APEX , with a total of
26 Letters about the instrumentation and the first
science results. As many as 17 of the 20 astronomical papers were based on data from the APEX -2a
receiver for 275-370 GH z, built by our receiver
group GARD . Most of the observing projects
were related to star formation. The frequencies
at which APEX operates are ideal to study the
chemical and physical conditions deep inside star
forming regions, which are often obscured from
view by cosmic dust which light cannot penetrate.
The radome housing
the Onsala 20 m
telescope.
Observers reported results from several different objects where both low- and high-mass stars
are born. Of special interest are the effects that
these young stars have on their environment, e.g.,
through ionizing radiation and outflows of gas.
Other objects studied were the centre of the Milky
Way galaxy, stars in late stages of evolution when
they lose mass, and regions of star formation in
other galaxies.
Staff
Christer Andersson
Per Bergman
Fredrik Blomqvist
Lars Eriksson
Lars-Göran Gunnarsson
Rüdiger Haas
Magne Hagström
Roger Hammargren
Leif Helldner
Christer Hermansson
Odin observations of water in Orion
The Odin satellite – launched in February 2001
– continues to deliver data. An interesting example
of Odin’s capabilities is the observations of spectral lines from interstellar water molecules. The
spectra show water and isotopologues observed
with Odin towards the massive star-forming
region Orion KL . These observations are part of
a large spectral line survey, covering 487– 492 and
542–577 GH z, aiming at a better understanding of
the physical and chemical conditions in a massive star-forming region. Observations of water
molecules are used to find shocks and star-forming
warm regions. The water isotopologue H217O and
the high-energy para-H2O transitions were both
observed for the first time. The results demonstrate
the main advantages of Odin over ground-based
work (the Earth’s atmosphere is completely
opaque at these frequencies) and over the earlier
SWAS satellite, which was not broadly tuneable.
Karl-Åke Johansson
Lars E.B. Johansson
Jan Karaskuru
Michael Lindqvist
Lars Lundahl
Biörn Nilsson
Michael Olberg
Hans Olofsson
Miroslav Pantaleev
(Jul-)
Glenn Persson
Lars Pettersson
Magnus Thomasson
Lars Wennerbäck
The staff at GARD
See page 8.
Spectra of water in Orion. Background picture is
The Orion Nebula. (Credit: NASA/JPL-Caltech/
T. Megeath University of Toledo).
Receiver developments
The receiver developments for Onsala, APEX and
ALMA are described by the Group for Advanced
Receiver Development, page 8.
The water vapour radiometer for ALMA.
17
Publications
The list includes work that was actually published during 2006. The publications
are presented for each research group and ordered alphabetically based on
the first author’s last name. Peer reviewed papers are listed first followed by
other types of publications. A few publications with authors from more than one
research group are listed in each group.
Advanced Receiver Development
Peer reviewed scientific articles
Belitsky, Victor; Risacher, C.; Pantaleev, Miroslav; Vassilev,
Vessen (2006). Superconducting microstrip line model
studies at millimetre and sub-millimetre waves. Int. Journal
of Infrared and Mill. Waves. 27 (6) pp. 809-834.
Risacher, Christophe; Vassilev, Vessen; Monje, Raquel;
Lapkin, Igor; Belitsky, Victor; Pavolotsky, Alexey; Pantaleev,
Miroslav; Bergman, Per; Ferm, Sven-Erik; Sundin, Erik;
Svensson, Magnus; Fredrixon, Mathias; Meledin, Denis;
Gunnarsson, Lars-Göran; Hagström, Magne; Johansson,
Karl-Åke; Olberg, Michael; Booth, Roy; Olofsson, Hans;
Nyman, L.-Å. (2006). A 0.8 mm heterodyne facility receiver
for the APEX telescope. Astronomy & Astrophysics.
454 pp. L17-L20.
Additional publications
Belitsky, V. (2006). Evaluating increased flexibility in an
international masters course: A Chalmers case study.
“Shifting Perspectives in Engineering Education”, ed.
M.F. Christie, Chalmers University of Technology. pp.
191-195. ISBN/ISSN: 10 91-631-8476-1, 13 978-91631-8476-5
Belitsky, Victor; Lapkin, Igor; Monje, Raquel; Vassilev,
Vessen; Risacher, Christophe; Pavolotsky, Alexey;
Meledin, Denis; Olberg, Michael; Pantaleev, Miroslav;
Booth, Roy (2006). Heterodyne Single-Pixel Facility
Instrumentation for APEX Telescope. in “Millimeter and
Submillimeter Detectors for Astronomy III”, eds. J.
Zmuidzinas, W.S. Holland, S. Withington, W.D. Duncan,
Proceedings of SPIE. 6275 pp. 15.
Nyström, Olle; Pantaleev, Miroslav; Lapkin, Igor;
Vassilev, Vessen; Belitsky, Victor (2006). A Vector Beam
Measurement System for 211-275 GHz. Proceedings
EuCAP 2006, Nice, France, 6-10 November 2006,
(ESA SP-626, October 2006). ISBN/ISSN: 92-9092937-5
Pantaleev, M. (2006). Radioastronomy Instrumentation
for Herschel and APEX Projects. Göteborg: Chalmers
University of Technology. Doctoral thesis ISBN/ISSN:
91-7291-806-3
Risacher, C.; Belitsky, Victor; Lapkin, Igor; Monje, Raquel;
Pantaleev, Miroslav; Vassilev, Vessen; Sundin, Erik;
Pavolotsky, Alexey; Meledin, Denis; Johansson, Karl-Åke;
Gunnarsson, Lars-Göran; Svensson, Magnus; Fredrixon,
Mathias; Ferm, Sven-Erik; Robles, V.P.; Hagström,
Magne; Booth, Roy; et., al. (2006). A 279-381 GHz
SIS Receiver for the APEX Telescope. Proceedings of
the 16th International Symposium on Space Terahertz
Technology, Chalmers University of Technology,
Gothenburg, Sweden, May 2-4, 2005. pp. 432-437.
Sundin, Erik; Pavolotsky, Alexey; Risacher, C.; Vassilev,
Vessen; Belitsky, Victor (2006). Cryogenic LNA
Characterization with SIS Junction as Noise Source.
Proceedings of the 16th International Symposium on
Space Terahertz Technology, May 2-4, 2005, Chalmers
University of Technology, Gothenburg, Sweden.
pp. 188-190.
Sundin, E. (2006). Development of Cryogenic Low
Noise 4-8 GHz HEMT Amplifier and its Advanced
Characterization. Göteborg: Chalmers University of
Technology.
Meledin, Denis; Pantaleev, Miroslav; Pavolotsky,
Alexey; Risacher, C.; Belitsky, Victor; Drakinskiy, V.;
Cherednichenko, S. (2006). Balanced Waveguide
HEB Mixer for APEX 1.3 THz Receiver. Proceedings
of 16th International Symposium on Space Terahertz
Technology, Chalmers University of Technology,
Gothenburg, Sweden, May 2-4, 2005. pp. 214-216.
Vassilev, Vessen; Monje, Raquel; Pavolotsky, Alexey;
Lapkin, Igor; Belitsky, Victor (2006). Sideband Separating
SIS Mixer with On-Substrate LO-Injection Circuitry.
Proceedings of the 16th International Symposium on
Space Terahertz Technology, Chalmers University of
Technology, Gothenburg, Sweden, May 2-4, 2005.
pp. 38-41.
Monje, R.; Belitsky, V.; Vassilev, V. (2006). A Novel Design
of Broadband Waveguide Directional Couplers and
3-dB Hybrids. IEEE MTT-S International Microwave
Symposium 2006, June 11-15, San Francisco,
California. pp. 1169-1172. ISBN/ISSN: 0-7803-9542-5
Vassilev, V; Monje, R; Pavolotsky, A; Dichev, D; Henke,
D; Belitsky, V. A 211-275 GHz Sideband Separating SIS
Mixer for APEX. 17th International Symposium on Space
Terahertz Technology, 10-12 May 2006, Paris.
Monje, Raquel; Belitsky, Victor; Vassilev, Vessen;
Pavolotsky, Alexey; Lapkin, Igor (2006). A 385-500
GHz SIS Mixer for APEX Telescope. in “Millimeter and
Submillimeter Detectors for Astronomy III”, eds. J.
Zmuidzinas, W.S. Holland, S. Withington, W.D. Duncan,
Proceedings of SPIE. 6275 pp. 19.
Global Environmental Measurements
Monje, Raquel; Risacher, C.; Vassilev, Vessen; Belitsky,
Victor (2006). Design of a Sideband Separating Receiver
for 500 GHz. Proceedings of 16th International
Symposium on Space Terahertz Technology, Chalmers
University of Technology, Gothenburg, Sweden, May
2-4, 2005. pp. 185-187.
18
Peer reviewed scientific articles
Barret, B.; Ricaud, P.; Santee, M.; Attie, J.-L.; Urban,
Joachim; Le Flochmoën, E.; Berthet, G.; Murtagh, Donal
P.; Eriksson, Patrick; Jones, Ashley; De La Noë, J.; Dupuy,
E.; Froideveaux, L.; Livesey, N.J.; Waters, J.W.; Filipiak,
M.J. (2006). Intercomparisons of trace gases profiles from
the Odin/SMR and Aura/MLS limb sounders. J. Geophys.
Res.. 111 (D21) pp. D21302.
Buehler, S.A.; von Engeln, A.; Brocard, E.; John, V.O.;
Kuhn, T.; Eriksson, Patrick (2006). Recent developments
in the line-by-line modeling of outgoing longwave radiation.
J. Quant. Spectros. Radiat. Transfer. 98 pp. 446-457.
Ejiri, M.K.; Terao, Y.; Sugita, T.; Nakajima, H.; Yokota, T.;
Toon, G.; Sen, B.; Wetzel, G.; Oelhaf, H.; Urban, Joachim;
Murtagh, Donal P.; Irie, H.; Saitoh, N.; Tanaka, T.; Kanzawa,
H.; Shiotani, M.; Aoki, S.; Hashida, G.; Machida, T.;
Nakazawa, T.; Kobayashi, H.; Sasano, Y. (2006). Validation
of the Improved Limb Atmospheric Spectrometer-II
(ILAS-II) Version 1.4 nitrous oxide and methane profiles. J.
Geophys. Res.. 111 (D22) pp. D22S90.
Eriksson, Patrick; Ekström, Mattias; Buehler, S.A.;
Melsheimer, C. (2006). Efficient forward modelling by
matrix representation of sensor responses. Int. J. Remote
Sensing. 27 pp. 1793-1808.
John, V.O.; Buehler, S.A.; von Engeln, A.; Eriksson,
Patrick; Kuhn, T.; Brocard, E.; Koenig-Langlo, G. (2006).
Understanding the variability of clear-sky outgoing longwave radiation based on ship-based temperature and
water vapor measurements. Q. J. R. Meteorol. Soc.. 132
pp. 2675-2691.
Kasai, Y.; Urban, Joachim; Takahashi, C.; Hoshino, S.;
Takahashi, K.; Inatani, J.; Shiotani, M.; Masuko, H. (2006).
Stratospheric Ozone Isotope Enrichment Studied by SubMillimeter Wave Heterodyne Radiometry: The Observation
Capabilities of SMILES. IEEE Transactions on
Geoscience and Remote Sensing. 44 (3) pp. 676-693.
Krecl, P.; Heley, C. S.; Stegman, J.; Brohede, Samuel;
Berthet, G. (2006). Retrieving the vertical distribution of
stratospheric OClO from Odin/OSIRIS limb-scattered
sunlight measurements. Atmos. Chem. Phys.. 6 pp. 18791894.
Rösevall, J. (2006). A study of polar ozone depletion
based on sequential assimilation of satellite data from
the ENVISAT/MIPAS and Odin/SMR instruments.
Atmospheric Chemistry and Physics, Open Discussion.
6 pp. 9967-9994.
Zelinger, Z.; Barret, B.; Kubat, P.; Ricaud, P.; Attie, J.-L.;
Le Flochmoen, E.; Urban, Joachim; Murtagh, Donal P.;
Strizik, M. (2006). Observation of HDO-18, CH3OH and
vibrationally-excited N2O from Odin/SMR measurements.
Molecular Physics. 104 (16-17) pp. 2815-2820.
Additional publications
Ekström, Mattias; Eriksson, Patrick; Rydberg, Bengt;
Murtagh, Donal (2006). First Odin sub-mm retrievals
in the tropical upper troposphere: humidity and cloud
ice signals. Atmospheric Chemistry and Physics
Discussions. 6 (5) pp. 8649-8680.
Ekström, M. (2006). Sub-Millimetre Measurements of
Upper Tropospheric Humidity. Göteborg: Chalmers
University of Technology.
Rösevall, J. (2006). A Study of Polar Ozone Depletion in
the Lower Stratosphere. Dynamical assimilation of O3
and N2O data from Odin/SMR and ENVISAT/MIPAS.
Göteborg: Chalmers University of Technology.
Urban, Joachim; Rösevall, John; Murtagh, Donal P.; and
the Odin/SMR team (2006). Odin/SMR limb observations
of lower stratospheric N2O, Cl O, H N O3, and O3 during
the Arctic winters 2004-05 and 2005-06. Joint WMO /
EC-SCOUT-O3 Arctic Ozone Bulletin – 2006 winter/
spring summary / editor Braathen, G.. (1) pp. 21-24.
Urban, Joachim; Murtagh, Donal P.; Lautié, Nicolas;
Barret, B.; Dupuy, E.; De La Noë, J.; Eriksson, Patrick;
Frisk, U.; Jones, Ashley; Le Flochmoën, E.; Olberg,
Michael; Piccolo, C.; Ricaud, P.; Rösevall, John (2006).
Odin/SMR Limb Observations of Trace Gases in the
Polar Lower Stratosphere during 2004-2005. Proc.
ESA First Atmospheric Science Conference, 8-12 May
2006, Frascati, Italy / editor Lacoste, H.. ESA-SP-628
Noordwijk: European Space Agency. ISBN/ISSN: ISBN92-9092-939-1, ISSN-1609-042X
Non-Linear Electromagnetics
Peer reviewed scientific articles
Anderson, D.; Buyanova, M.; Dorozhkina, D.S.; Jordan, U.;
Lisak, M.; Nefedov, I.; Olsson, T.; Puech, J.; Semenov, V.;
Shereshevski, I.; Udiljak, R. (2006). Microwave breakdown
in RF devices. 33rd European Physical Society
Conference on Plasma Physics, Rome, June 19-23,
2006. p. 429.
Dorozhkina, D.; Semenov, V.E.; Olsson, T.; Anderson, Dan;
Jordan, Ulf; Puech, J.; Lapierre, L.; Lisak, Mietek (2006).
Investigations of time delays in microwave breakdown
initiation. Physics of Plasmas. 13 pp. 013506.
Fedele, R.; Anderson, D.; Lisak, M. (2006). How the
coherent instabilities of an intense high energy charged
particle beam in the presence of nonlocal effects can
be explained within the context of the Madelung fluid
description. Eur. Phys. J.. B49 pp. 275.
Forzati, M.; Berntson, A.; Mårtensson, J.; Davies, R.J.
(2006). Performance analysis of single-MZM APRZ
transmitters. J. Lightwave Techn. 24
Forzati, M.; Berntson, A.; Mårtensson, J.; Djupsjöbacka, J.;
Melin, S. (2006). 40 Gb/s field experiment over an 820
km transmission link designed for 10Gbit/s, using the
APRZ modulation format. Electronics Lett. 42, p. 991
Fülöp, Tünde; Pokol, Gergö; Helander, Per; Lisak, Mietek
(2006). Destabilization of magnetosonic-whistler waves by
a relativistic runaway beam. Physics of Plasmas. 13 pp.
062506.
Fülöp, T.; Weiland, J. (2006). Impurity transport in ITERlike plasma. Physics of Plasmas. 13 pp. 112504.
Helander, P.; Fülöp, T.; Lisak, M. (2006). Tokamak current
driven by poloidally asymmetric fueling. Physics of
Plasmas. 13 pp. 062506.
Johannisson, P.; Adolfsson, G.; Karlsson, M. (2006).
Suppression of Phase Error in Differential Phase-Shift
Keying Data by Amplitude Regeneration. Optics Letters.
31 (10) pp. 1385-1387.
Jordan, U.; Anderson, D.; Lapierre, L.; Lisak, M.; Olsson,
T.; Puech, J.; Semenov, V.; Sombrin, J.; Tomala, R. On the
effective diffusion length for microwave breakdown. IEEE
Plasma Science. 34, 421 (2006)
Sandquist, P. (2006). Alfvén cascades in JET discharges
with NBI-heating. Nuclear Fusion. (46) pp. S868.
Sandquist, Patrik; Sharapov, S.E.; Helander, P.; Lisak,
Mietek (2006). Relativistic electron distribution function
of a plasma in a near-critical electric field. Physics of
Plasmas. 13 pp. 072108.
Smith, Håkan; Breizman, B.N.; Lisak, Mietek; Anderson,
Dan (2006). Non-linearly driven second harmonics of
Alfvén cascades. Physiscs of Plasmas. 13 pp. 042504.
Smith, Håkan; Helander, P.; Eriksson, L.-G.; Anderson,
Dan; Lisak, Mietek; Andersson, F. (2006). Runaway
electrons and the evolution of the plasma current in
tokamak disruptions. Physics of Plasmas. 13 (10) pp.
102502.
Tomala, Rafal; Anderson, Dan; Jordan, Ulf; Lisak, Mietek.
(2006). Microwave breakdown field in a spherical
resonant cavity. Contr. Plasma Phys.. 46 pp. 285.
Additional publications
Buyanova, M. (2006). Multipactor Discharge: Theoretical
Analysis and Numerical Simulations. Göteborg:
Chalmers University of Technology.
19
Forzati, M. (2006). The alternate-phase return-to-zero modulation
format in high-speed optical-fibre communications. Göteborg:
Chalmers University of Technology.
Fülöp, Tünde; Pokol, G.; Helander, P.; Lisak, Mietek (2006).
Destabilization of magnetosonic-whistler waves by a relativistic runaway
beam. Proceedings of the 33th EPS Conference on Plasma Physics,
Rome, 2006. pp. p 1.182.
Fülöp, T.; Weiland, J. (2006). Impurity transport in ITER-like plasmas.
21st IAEA Fusion Energy Conference, Chengdu, 16-21 October. pp.
TH/P2-24.
Gál, Kinga; Smith, Håkan; Fülöp, Tünde; Helander, Per (2006). Runaway
electron generation during plasma shutdown by killer pellet injection.
21st IAEA Fusion Energy Conference, Chengdu, 16-21 October. pp.
TH/P3-2.
Helander, P.; Fülöp, T.; Lisak, M. (2006). Tokamak current driven by
poloidally asymmetric fueling. Proceedings of the 33rd EPS Plasma
Physics Conference, Rome 2006. pp. p 1.183.
Johannisson, P. (2006). Nonlinear intrachannel distortion in highspeed optical transmission systems. Göteborg: Chalmers University of
Technology. Doctoral thesis ISBN/ISSN: 91-7291-843-8
Olsson, T.; Jordan, U.; Dorozhkina, D.S.; Semenov, V.; Anderson, D.;
Lisak, M.; Puech, J.; Nefedov, I.; Shereshevskii, I. Microwave Breakdown
in RF Devices Containing Sharp Corners. 2006 IEEE MTT-S
International Microwave Symposium, San Francisco, CA June 11-16,
2006, Proceedings. pp 1233-1236.
Pokol, Gergö; Fülöp, Tünde; Helander, Per; Lisak, Mietek (2006).
Destabilization of magnetosonic-whistler waves by a relativistic runaway
beam. 21st IAEA Fusion Energy Conference, Chengdu, 16-21
October. pp. TH/P6-2.
Porkolab, M.; Edlund, E.; Lin, L.; Parker, R.; Rost, C.; Sears, J.; Snipes, J.;
Wukitch, S. J.; Breizman, B. N.; Gorelenkov, N. N.; Kramer, G. J.; Fasoli,
A.; Smith, Håkan (2006). Experimental studies and analysis of Alfvén
eigenmodes in Alcator C-Mod. 21st IAEA Fusion Energy Conference,
Chengdu. pp. EX/P6-16.
Sandquist, Patrik; Sharapov, S.E.; Helander, P.; Lisak, Mietek (2006).
Relativistic electron distribution function of a plasma in a nearcritical electric field. Proceedings of the 33rd EPS Plasma Physics
Conference, Rome 2006. pp. 1.092.
Smith, Håkan; Helander, P.; Eriksson, L.-G.; Anderson, Dan; Lisak,
Mietek; Andersson, F. (2006). Runaway electrons and the evolution of
the plasma current in tokamak disruptions. Proceedings of the 33rd
EPS Plasma Physics Conference, Rome 2006. pp. 4.178.
Smith, H. (2006). Runaway electrons and Alfvén eigenmodes in
tokamaks. Göteborg: Chalmers University of Technology. Doctoral thesis
ISBN/ISSN: 91-7291-857-8
Optical Remote Sensing
Peer reviewed scientific articles
de Foy, B.; Lei, W.; Zavala, M.; Volkamer, R.; Samuelsson, Jerker;
Mellqvist, Johan; Galle, Bo; Martinez, A-P; Grutter, M.; Molina, L.T.
(2006). Modelling constraints on the emission inventory and on vertical
diffusion for CO and SO2 in the Mexico City Metropolitan Area using
Solar FTIR and zenith UV spectroscopy. Atmos. Chem. Phys. Discuss..
6 (2006) pp. 6125-6181.
Liu, L.; Flatoy, F.; Ordones, C.; Braathen, G.O.; Hak, C.; Junkermann,
W.; Adreani-Aksoyoglu, J.; Mellqvist, Johan; Galle, Bo; Prevot, A. S. H.;
Isakssen, I.S.A. (2006). Photochemical modeling in the Po basin with
focus on formaldehyde and ozone. Atmos. Chem. Phys. Discuss. 6
(2006) pp. 5057-5094.
Additional publications
Galle, Bo; Platt, U.; Oppenheimer, C.; Millan, M.; Alonso, L.; Chen, D.
(2006). Development of Optical Remote Sensing Instruments for
Volcanological Applications. Report. Göteborg: Chalmers University of
Technology.
20
Galle, B.; Platt, U.; Oppenheimer, C. et al. (2006). Development of
Optical Remote Sensing Instruments for Volcanological Applications
– results from the EU-project DORSIVA. Conference proceedings.
Cities on Volcanoes IV, Quito, 23-27 January, 2006.
Galle, B. (2006). Method and device for measuring emissions of
gaseous substances to the atmosphere using scattered Sunlight
spectroscopy. Request for patent.
Galle, B.; Mellqvist, J. (2006). Method for measuring of gaseous
emissions and/or flux. Patent.
Galle, Bo; Platt, U.; Van Roozendael, M.; Oppenheimer, C.; Hansteen, T.;
Boudon, G.; Burton, M.; Delgado, H.; Strauch, W.; Malavassi, E.; Garzon,
G.; Pullinger, C.; Kasereka, M.; Carn, S.; Molina, L. (2006). Network for
Observation of Volcanic and Atmospheric Change. Poster. Cities on
Volcanoes IV, Quito, 23-27 January, 2006.
Rivera, Claudia; Galle, Bo; Delgado Granados, H.; Cárdenas González,
L.; Morquecho-Zamarripa, C.; Johansson, Mattias; Zhang, Yan (2006).
Understanding eruptive behavior by coupling SO2 emission and
seismicity data at Popocatépetl volcano (México). Poster. Cities on
Volcanoes IV, Quito, 23-27 January, 2006.
Radar Remote Sensing
Peer reviewed scientific articles
Santoro, M.; Eriksson, L.E.B.; Askne, J.; Schmullius, C. (2006).
Assessment of standwise stem volume retrieval in boreal forest from
JERS-1 L-band SAR backscatter. International Journal of Remote
Sensing. 27 (16) pp. 3425-3453.
Additional publications
Dupuis, X.; Dreuillet, P.; Ulander, L.M.H.; Gustavsson, A. (2006). Multipass and multi-date at P and L bands: Ground penetration and change
detection. EUSAR 2006, held in Dresden, Germany, May 2006.
Eriksson, L.E.B.; Askne, J.; Santoro, M.; Wiesmann, A. (2006). Forest
parameter estimation using JERS-1 repeat-pass interferometry: Stem
volume retrieval in Siberia and Sweden. IEEE Geoscience and Remote
Sensing Symposium (IGARSS), held in Denver, Colorado, July 2006.
pp. 2212.
Folkesson, K.; Hallberg, B.; Smith-Jonforsen, G.; Ulander, L.M.H. (2006).
Automatic Detection of Wind-Thrown Forest in VHF SAR Images. IEEE
Geoscience and Remote Sensing Symposium (IGARSS), held in
Denver, Colorado, July 2006. pp. 3599.
Frölind, P-O.; Ulander, L.M.H.; Murdin, D. (2006). Fast Factorised
Backprojection Algorithm for Processing of SAR Data. Proc. IoA
International Conference on Synthetic Aperture Sonar and Synthetic
Aperture Radar, held in Lerici, Italy, 11-12 September, 2006. pp. 168175.
Gustavsson, A.; Ulander, L.M.H.; Frölind, P-O.; Hallberg, B.; SmithJonforsen, G.; Dreuillt, P.; Dubois-Fernandez, P.; Ruault du Plessis, O.
(2006). LORAM - A SAR/GMTI Data Collection Campaign. EUSAR
2006, held in Dresden, Germany, May 2006.
Lundberg, M.; Ulander, L.M.H.; Pierson, W.E.; Gustavsson, A. (2006).
A challenge problem for detection of targets in foliage. Algorithms for
Synthetic Aperture Radar Imagery XIII, Proceedings of the SPIE.
6237
Santoro, M.; Askne, J. (2006). Accuracy assessment of stem volume
retrieval from ERS-1/2 multitemporal coherence in Eurasian boreal
forests. IEEE Geoscience and Remote Sensing Symposium
(IGARSS), held in Denver, Colorado, July 2006. pp. 2208.
Santoro, M.; Askne, J.; Weismann, A.; Schmullius, C. (2006). ERS and
ENVISAT SAR coherence properties of boreal forests. EARSel 2006,
held in Warsaw.
Santoro, M.; Wegmüller, U.; Werner, C.; Askne, J. (2006). ERS-ENVISAT
coherence properties of land cover. IEEE Geoscience and Remote
Sensing Symposium (IGARSS), held in Denver, Colorado, July 2006.
pp. 2561.
Smith-Jonforsen, G.; Hallberg, B.; Folkesson, K. (2006). Algorithms for
automatic detection of wind thrown trees in CARABAS SAR images.
Göteborg: Chalmers University of Technology.
Smith-Jonforsen, G.; Hallberg, B.; Folkesson, K.; Fransson, J.E.S.;
Frölind, P-O.; Gustavsson, A.; Ulander, L.M.H.; Magnusson, M. (2006).
VHF/UHF Ultra-Wideband SAR Measurements of Forests. EUSAR
2006, held in Dresden, Germany, May 2006.
Wresnik, J.; Böhm, J.; Haas, Rüdiger; Schuh, H. (2006). Thermal
Deformation of Radio Telescopes Onsala and Wettzell. International
VLBI Service for Geodesy and Astrometry 2006 General Meeting
Proceedings / Behrend, D., Baver, K.. (2006-214140) pp. 300-303.
Transport Theory
Ulander, L.M.H.; Eriksson, L.E.B.; Smith-Jonforsen, G.; Fransson,
J.E.S.; Olsson, H. (2006). ALOS Calibration and Validation Activities
in Sweden. IEEE Geoscience and Remote Sensing Symposium
(IGARSS), held in Denver, Colorado, July 2006. pp. 336.
Peer reviewed scientific articles
Ulander, L.M.H.; Martin, T. (2006). Bistatic clutter suppression in lowfrequency SAR. EUSAR 2006, held in Dresden, Germany, May 2006.
Anderson, J.; Nordman, H.; Weiland, J. (2006). Excitation of Zonal Flows
by Collisionless Trapped Electron Modes. Plasma Phys. Control Fusion.
49 pp. 651.
Ulander, L.M.H.; Frölind, P-O.; Murdin, D. (2006). Fast Factorised
Backprojection Algorithm for Processing of Microwave SAR Data.
EUSAR 2006, held in Dresden, Germany, May 2006.
Ulander, L.M.H.; Gustavsson, A.; Smith-Jonforsen, G.; Folkesson, K.;
Hallberg, B.; Eriksson, L.E.B.; Fransson, J.E.S.; Magnusson, M. (2006).
Mapping of wind-thrown forests using the VHF-band CARABAS-II SAR.
IEEE Geoscience and Remote Sensing Symposium (IGARSS), held
in Denver, Colorado, July 2006. pp. 3684.
Space Geodesy and Geodynamics
Peer reviewed scientific articles
Haas, R.; Wünsch, J. (2006). Sub-diurnal earth rotation variations from
the VLBI CONT02 campaign. Journal of Geodynamics. 41 pp. 94-99.
Nilsson, T.; Gradinarsky, L. (2006). Water Vapor Tomography Using GPS
Phase Observations: Simulation Results. IEEE Trans. on Geosci. and
Rem. Sens.. 44 (10) pp. 2927-2941.
Snajdrova, Kristyna; Böhm, Johannes; Willis, Pascal; Haas, Rüdiger;
Schuh, Harald (2006). Multi-technique comparison of tropospheric
zenith delays derived during the CONT02 campaign. Journal of
Geodesy. 79 (10-11 ) pp. 613-623.
Additional publications
Bergstrand, S. (2006). GPS for Geophysics: Glacial Isostatic
Adjustment and Tests of Ionospheric Models. Göteborg: Chalmers
University of Technology. Doctoral thesis ISBN/ISSN: 91-7291-721-0
Edh, A.; Haas, R. (2006). Crustal Deformation in South America
from GPS and VLBI. International VLBI Service for Geodesy and
Astrometry 2006 General Meeting Proceedings / Behrend, D., Baver,
K.. (NASA/CP-2006-214140) pp. 356-360.
Granström, C. (2006). Site-Dependent Effects in High-Accuracy
Applications of GNSS. Göteborg: Chalmers University of Technology.
Haas, R. (2006). Investigating High-Frequency Earth Orientation
Variations with Continuous Geodetic VLBI Campaigns. International
VLBI Service for Geodesy and Astrometry 2006 General Meeting
Proceedings / Behrend, D., Baver, K.. (2006-214140) pp. 316-319.
Haas, R.; Scherneck, H-G. (2006). The IVS Analysis Center at the
Onsala Space Observatory. IVS 2005 Annual Report, NASA/TP-2006214136. pp. 260-263.
Hernandez, D.; Haas, R. (2006). GPS on the VLBI Telescopes at Onsala
and Ny-Ålesund. IVS 2006 General Meeting Proceedings, NASA/CP2006-214140. pp. 167-171.
Nilsson, T.; Elgered, G.; Gradinarsky, L. (2006). Characterizing
Atmospheric Turbulence and Instrumental Noise Using Two
Simultaneously Operating Microwave Radiometers. Proc. 9:th Specialist
Meeting on Microwave Radiometry and Remote Sensing Applications,
MicroRad 2006. pp. 270-275.
Nilsson, T.; Elgered, G.; Haas, R. (2006). The IVS Technology
Development Center at the Onsala Space Observatory. IVS 2005
Annual Report, NASA/TP-2006-214136. pp. 294-297.
Anderson, J; Nordman, H; Singh, R; Weiland, J (2006). Zonal flow
generation in collisionless trapped electron mode turbulence. Plasma
Phys. Control Fusion. 48 pp. 651.
Anderson, J.; Nordman, H. (2006). The role of magnetic shear for zonal
flow generation. J. Plasma Physics. 72 pp. 609.
Casper, T.A.; Burrell, K.H.; Doyle, E.J.; Gohill, P; Lasnier, C.J.; Leonard,
A.W.; Moller, J.M.; Osborne, T.H.; Snyder, P.B.; Thomas, D.M.; Weiland,
J; West, W.P. (2006). Density and temperature modifications with
electron cyclotron power injection in quisent double barrier discharges
on DIII-D. Plasma Phys. Control. Fusion. 48 pp. A35.
de Greef, M; Jenkins, I; Knoops, H.C.M.; Mantica, P; Nordman, H;
Strand, P; Tala, T; Weiland, J; Zastrow, K.D.; de Vries, P.C.; Rantamäki,
K.M.; Giroud, C; Asp, E; Corrigan, G; Eriksson, A (2006). Plasma
rotation and momentum transport studies at JET. Plasma Phys. Control.
Fusion. 48 pp. 1693.
Fülöp, T.; Weiland, J. (2006). Impurity transport in ITER-like plasma.
Physics of Plasmas. 13 pp. 112504.
Mantica, P; Ryter, F; Capuano, C; Fahrbach, H.U.; Leuterer, F; Suttrop,
W; Weiland, J (2006). Investigation of electron heat pinch in ASDEXUpgrade. Plasma Phys. Control. Fusion. 48 pp. 385.
Tala, T; Imbeaux, F; Parail, V.V.; Bourdelle, C; Corrigan, G; Garbet,
X; Heading, D.J.; Litaduon, X; Strand, P.I.; Weiland, J (2006). Fully
predictive time-dependent transport simulations of ITB plasmas in JET.
Nuclear Fusion. 46 pp. 548.
Additional publications
Anderson J., Nordman H., Kishimoto Y. The role of magnetic shear for
zonal flow generation and transport barriers. 33rd EPS Conference on
Plasma Physics, Rome Italy (2006).
deVries P.; Knoops H.C.M.; Rantamäki K.M.; Giroud C.; Asp E.; Corrigan
G.; Eriksson A.; de Greef M.; Jenkins I.; Mantica P.; Nordman H.; Strand
P.; Tala T.; Weiland J.; Zastrow K.-D. Momentum Transport Studies at
JET. 10th ITPA Transport and ITB topical meeting, Princeton, NJ USA
(2006).
deVries P.; Rantamaki K.; Asp E.; Corrigan G.; Eriksson A.; Giroud C.;
Knoops H.C.M.; Mantica P.; Nordman H.; Strand P.; Tala T.; Weiland J.
Plasma Rotation and Momentum Transport studies at JET. 33rd EPS
Conference on Plasma Physics, Rome Italy (2006).
deVries P.; Rantamäki K.M.; Asp E.; Corrigan G.; Eriksson A.; Giroud
C.; Knoops H.C.M.; Mantica P.; Nordman H.; Strand P.; Tala T.; Weiland
J.; Zastrow K.-D. Study of Momentum Transport in ELMy H-mode JET
discharges. 11th EU-US Transport Task Force Workshop, Marseille
France (2006).
Eriksson, A.; Garzotti, L.; Weiland, J. (2006). Particle Pinches in Fluid
and Kinetic Descriptions. 21st IAEA Fusion Energy Conference,
Chengdu, 16-21 October. pp. TH/P2-4.
Eriksson A.; Nordman H.; Weiland J.; Strand P.; Tala T.; deVries P.
Predictive simulations of toroidal momentum transport in JET. 48th
Annual Meeting of APS Division of Plasma Physics, Philadelphia,
Pennsylvania USA.
Fülöp, T.; Weiland, J. (2006). Impurity transport in ITER-like plasmas.
21st IAEA Fusion Energy Conference, Chengdu, 16-21 October. pp.
TH/P2-24.
21
Nordman H.; Strand P.; Garbet X. ITG and TE mode turbulence and
transport in advanced fluid descriptions. 33rd EPS Conference on
Plasma Physics, Rome Italy (2006).
Tala T.; Andrew Y.; Crombe K.; de Vries P.C.; Garbet X.; Hawkes N.;
Nordman H.; Rantamäki K.; Strand P.; Thyagaraja A.; Weiland J.; Asp E.;
Baranov Y.; Challis C.; Corrigan G.; Eriksson A.; Giroud C.; Hua M.-D.;
Jenkins I.; Knoops H.C.M.; Litaudon X.; Mantica P.; Naulin V.; Parail V.;
Zastrow K.-D. Overview of Poloidal and Toroidal Momentum Transport
Studies in JET. 21st IAEA Fusion Energy Conference, Chengdu China
(2006).
Weiland J.; Nordman H. Anomalous momentum transport due to driftwaves in tokamaks. 33rd EPS Conference on Plasma Physics, Rome
Italy (2006).
The Swedish National Facility for Radio Astronomy
and Radio Astronomy and Astrophysics
Peer reviewed scientific articles
Black, J. H. (2006). Chemistry and cosmology. Faraday Discussions of
the Royal Society of Chemistry (UK). 133 pp. 27-32.
Buckle, Jane V.; Rodgers, Steven D.; Wirström, Eva; Charnley, Steven B.;
Markwick-Kemper, Andrew J.; Butner, Harold M.; Takakuwa, Shigehisa
(2006). Observations of chemical differentiation in clumpy molecular
clouds. Faraday Discussions. 133 pp. 63 - 82.
Elmegreen, Debra Meloy; Elmegreen, Bruce G; Kaufman, Michele;
Sheth, Kartik; Struck, Curtis; Thomasson, Magnus; Brinks, Elias
(2006). Spitzer Space Telescope IRAC and MIPS Observations of
the Interacting Galaxies IC 2163 and NGC 2207: Clumpy Emission.
Astrophysical Journal. 642 (I) pp. 158-170.
Gahm, G.F.; Carlqvist, P.; Johansson, Lars E.B.; Nikolic`, S. (2006).
Rotating elephant trunks*. Astronomy & Astrophysics. 454 pp. 201-212.
Güsten, R.; Nyman, L.-Å.; Schilke, P.; Menten, K.; Cesarsky, C.; Booth,
Roy (2006). The Atacama Pathfinder EXperiment (APEX) – a new
submillimeter facility for southern skies. Astronomy & Astrophysics.
454 pp. L13-L16.
Hasegawa, T.I.; Kwok, S.; Koning, N.; Volk, K.; Justtanont, K.; Olofsson,
Hans; Schöier, F.L.; Sandqvist, Aa.; Hjalmarson, Åke; Olberg, Michael;
Winnberg, Anders; Nyman, L.-Å.; Frisk, U. (2006). Observations of the
Circumstellar Water 110-->101 and Ammonia 10-->00 Lines in IRC
+10216 by the Odin Satellite. The Astrophysical Journal. 637 pp. 791797.
Kalenskii, S.V.; Promyslov, V.G.; Slysh, V.I.; Bergman, Per; Winnberg,
Anders (2006). The detection of class I methanol masers towards
regions of low-mass star formation. Astronomy Reports. 50 (4) pp.
289-297.
Kun, Maria; Nikolic’, S.; Johansson, Lars E.B.; Balog, Z.; Gaspar, A.
(2006). Low-mass star formation in Lynds 1333. M.N.R.A.S.. 371 (2) pp.
732.
Neufeld, D.A.; Schilke, P.; Menten, K.M.; Wolfire, M.G.; Black, John H.;
Schuller, F.; Müller, H.S.P.; Thorwirth, S.; Güsten, R.; Philipp, S. (2006).
Discovery of interstellar CF+. Astronomy & Astrophysics. 454 pp. L37L40.
Patrikeev, I.; Fletcher, A.; Stepanov, R.; Beck, R.; Berkhuisen, E.M.; Frick,
P.; Horellou, Cathy (2006). Analysis of spiral arms using anisotropic
wavelets: gas, dust and magnetic fields in M51. Astronomy &
Astrophysics. 458 pp. 441-452.
Pestalozzi, M.R.; Minier, V.; Motte, F.; Conway, John (2006). Discovery of
two new methanol masers in NGC 7538. Astronomy & Astrophysics.
448 pp. L57-L60.
Ramstedt, S.; Schöier, F.L.; Olofsson, Hans; Lundgren, A.A. (2006).
Mass-loss properties of S-stars on the AGB. Astronomy & Astrophysics.
454 pp. L103-L106.
Risacher, Christophe; Vassilev, Vessen; Monje, Raquel; Lapkin, Igor;
Belitsky, Victor; Pavolotsky, Alexey; Pantaleev, Miroslav; Bergman, Per;
Ferm, Sven-Erik; Sundin, Erik; Svensson, Magnus; Fredrixon, Mathias;
22
Meledin, Denis; Gunnarsson, Lars-Göran; Hagström, Magne; Johansson,
Karl-Åke; Olberg, Michael; Booth, Roy; Olofsson, Hans; Nyman, L.-Å.
(2006). A 0.8 mm heterodyne facility receiver for the APEX telescope.
Astronomy & Astrophysics. 454 pp. L17-L20.
Schöier, F.; Fong, D.; Olofsson, Hans; Zhang, Q.; Patel, N. (2006). The
distribution of SiO in the circumstellar envelope around IRC+10216.
The Astrophysical Journal. 649 pp. 965-972.
Schöier, F.L.; Olofsson, H.; Lundgren, A.A. (2006). SiO in C-rich
circumstellar envelopes of AGB stars: effects of non-LTE chemistry and
grain adsorption. Astronomy & Astrophysics. 454 pp. 247-255.
White, G.; Fridlund, C.W.M.; Bergman, Per; Beardsmore, A.; Liseau, R.;
Price, M.; Phillips, R.R. (2006). Methanol in the L1551 Circumbinary
Torus. The Astrophysical Journal. 651 (1) pp. L41-L44.
Wirström, Eva; Bergman, Per; Olofsson, Henrik; Frisk, U.; Hjalmarson,
Åke; Olberg, Michael; Persson, Carina; Sandqvist, Aa. (2006). Odin *
CO and 13CO J = 5 - 4 mapping of Orion KL – a step towards accurate
water abundances. Astronomy & Astrophysics. 453 pp. 979-987.
Wyrowski, F.; Menten, K.M.; Schilke, P.; Thorwirth, S.; Güsten, R.;
Bergman, Per (2006). Revealling the environs of the remarkable
southern hot core G327.3-0.6. Astronomy & Astrophysics. 454 pp.
L91-L94.
Additional publications
Aalto, S. (2006). Chemistry in the Dense Molecular Gas of Starburst
Galaxies and AGNs. In “Astrochemistry: Throughout the Universe:
Recent Successes and current Challenges”. Proc. of 31st Symp. of
the IAU, Pacific Grove, California, Sept. 2005, eds. D.C. Lis, G.A.
Blake, E. Herbst, Cambridge University Press. pp. 261-270.
Belitsky, Victor; Lapkin, Igor; Monje, Raquel; Vassilev, Vessen; Risacher,
Christophe; Pavolotsky, Alexey; Meledin, Denis; Olberg, Michael;
Pantaleev, Miroslav; Booth, Roy (2006). Heterodyne Single-Pixel Facility
Instrumentation for APEX Telescope. in “Millimeter and Submillimeter
Detectors for Astronomy III”, eds. J. Zmuidzinas, W.S. Holland, S.
Withington, W.D. Duncan, Proceedings of SPIE. 6275 pp. 15.
Berciano Alba, A.; Borges de Silva, P.; Eichelberger, H.; Giovacchini, F.;
Godolt, M.; Hasinger, G.; Lerchester, M.; Lusset, V.; Mattana, F.; Mellier,
Y.; Michalowski, M.; Monteserin-Sanchez, C.; Noviello, F.; Persson,
Carina; Santovincenzo, A.; Schneider, P.; Zhang, M.; Östman, L. (2006).
DEMON: a proposal for a satellite-borne experiment to study dark matter
and dark energy. Proceedings of the SPIE: Space Telescopes and
Instrumentation II: Ultraviolet to Gamma Ray, eds, M.J.L. Turner and
G. Hasinger. 6266 pp. 91.
Haas, R.; Elgered, G. (2006). The IVS Network Station Onsala Space
Observatory. IVS 2005 Annual Report, NASA/TP-2006-214136. pp.
111-114.
Kirsanova, M.S.; Sobolev, A.M.; Thomasson, Magnus; Johansson, Lars
E.B.; Shelemej, O.V.; Polyakov, A.M.; Tsivilev, A.P.; Pankratova, N.V.
(2006). Molecular Survey of Massive Star Forming Regions Located
in Perseus Spiral Arm. Triggered Star Formation in a Turbulent ISM,
International Astronomical Union. Symposium no. 237, held 14-18
August, 2006 in Prague, Czech Republic. S237 (#145)
Neufeld, D.A.; Schilke, P.; Menten, K.M.; Wolfire, M.G.; Black, John H.;
Schuller, F.; Müller, H.; Thorwirth, S.; Güsten, R.; Philipp, S. (2006).
First Astronomical Detection of the CF+ Ion. Astrochemistry: Recent
successes and current challenges, Proc. of the 231st symposium of
the IAU, Pacific Grove, California, Aug-Sept 2005, eds. D.C. Lis, G.A.
Blake, E. Herbst, Cambridge University Press. pp. 163-164.
Olsson, E. (2006). A High Resolution Study of the LINER Galaxy
NGC5218. Göteborg: Chalmers University of Technology.
Olofsson, H. (2006). Molecular Abundandances in AGB Circumstellar
Envelopes. Astrochemistry: Recent successes and current challenges,
Proc. of the 231st symposium of the IAU, Pacific Grove, California,
Aug-Sept 2005. pp. 499-507.
Olofsson, H. (2006). The circumstellar environment of asymptotic
giant branch stars. Astronomische Gesellschaft: Reviews in Modern
Astronomy. The many facets of the Universe – Revelation by New
Instruments, ed. S. Röser, Wiley-VCH. 19 pp. 75. ISBN/ISSN: 352740-662-X
Persson, C. M. (2006). Molecular Astrophysics in Star-forming Regions
with the Odin Satellite. Göteborg: Chalmers University of Technology.
Risacher, C.; Belitsky, Victor; Lapkin, Igor; Monje, Raquel; Pantaleev,
Miroslav; Vassilev, Vessen; Sundin, Erik; Pavolotsky, Alexey; Meledin,
Denis; Johansson, Karl-Åke; Gunnarsson, Lars-Göran; Svensson,
Magnus; Fredrixon, Mathias; Ferm, Sven-Erik; Robles, V.P.; Hagström,
Magne; Booth, Roy; et., al (2006). A 279-381 GHz SIS Receiver for the
APEX Telescope. Proceedings of the 16th International Symposium
on Space Terahertz Technology, Chalmers University of Technology,
Gothenburg, Sweden, May 2-4, 2005. pp. 432-437.
Roueff, E.M.; Le Petit, F. (2006). Modelling Diffuse Interstellar
Environments. Astrochemistry: Recent successes and current
challenges, Proc. of the 231st symposium of the IAU, Pacific Grove,
California, Aug-Sept 2005, eds. D.C. Lis, G.A. Blake, E. Herbst,
Cambridge University Press. pp. 197-206.
Urban, Joachim; Murtagh, Donal P.; Lautié, Nicolas; Barret, B.; Dupuy, E.;
De La Noë, J.; Eriksson, Patrick; Frisk, U.; Jones, Ashley; Le Flochmoën,
E.; Olberg, Michael; Piccolo, C.; Ricaud, P.; Rösevall, John. (2006).
Odin/SMR Limb Observations of Trace Gases in the Polar Lower
Stratosphere during 2004-2005. Proc. ESA First Atmospheric Science
Conference, 8-12 May 2006, Frascati, Italy / editor Lacoste, H.. ESASP-628 Noordwijk: European Space Agency. ISBN/ISSN: ISBN-929092-939-1, ISSN-1609-042X
Winnberg, Anders; Deguchi, S.; Habing, H.J.; Nakashima, J.; Olofsson,
Hans; Reid, M.J. (2006). Circumstellar CO in OH/IR Stars Close to the
Galactic Centre. J. Physics: Conference Series. 54 pp. 166-170.
Wirström, E. (2006). Studies in Molecular Astrophysics and
Astrobiology. Göteborg: Chalmers University of Technology.
Wresnik, J.; Böhm, J.; Haas, Rüdiger; Schuh, H. (2006). Thermal
Deformation of Radio Telescopes Onsala and Wettzell. International
VLBI Service for Geodesy and Astrometry 2006 General Meeting
Proceedings / Behrend, D., Baver, K.. (2006-214140) pp. 300-303.
Sobolev, A.M.; Kirsanova, M.S.; Johansson, Lars E.B.; Thomasson,
Magnus; Polyakov, A.M. (2006). Do Large Scale Shocks Trigger Massive
Star Formation in Perseus Spiral Arm ?. Triggered Star Formation in a
Turbulent ISM, International Astronomical Union. Symposium no. 237,
held 14-18 August, 2006 in Prague, Czech Republic. S237 (#214)
On June 8, 2006, the department went on a day trip to Hönö in the archipelago
of Göteborg. After lectures on the equality between the sexes by Johanna Almer
(Chalmers) and stress by Jan Bengtsson (Haluxa) we carried out a combined
open-air walking and quiz competition and ended up on the water tower of
Hönö with a nice view of the surroundings. The evening concluded with
sea food at the seashore.
Production: Department of Radio & Space Science, Deparment of Service and Support, Chalmers
Printed by Eskils Tryckeri AB, Borås, April 2007. Copies: 1,000.
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Department of Radio and Space Science
Chalmers University of Technology
SE-412 96 Göteborg, Sweden
Telephone: +46 31-772 1000
Internet: www.chalmers.se
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