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Muon Production of Neutrons in Multiple Targets Geant4/FLUKA
Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM Collaboration Meeting at Fermi National Lab Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkansas @ Little Rock March 21st, 2014 Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkans Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM C Introduction to Cosmic Showers Underground experiments utilize various simulation packages to quantify cosmogenic muon-induced backgrounds, particularly neutron backgrounds. Simulated backgrounds are dependent on package’s ability to implement physics processes. Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkans Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM C Geant4/FLUKA Comparison Goals I I Explore physics of Geant4 and FLUKA and how the physics is implemented. Focus on potentially measurable characteristics I I Neutron Yield Isotope Production Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkans Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM C Simulation and Geometry Energies Materials Liquid Scintillator Calcium Carbonate Greenstone Water Lead Iron 10 GeV 100 GeV 280 GeV 30 GeV 200 GeV (Greenstone) 1 TeV Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkans Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM C Integrated Neutron Energy Flux in LS and Water I I The one-directional neutron flux integrated over the detector cross section perpendicular to the momentum of the muon primary is a good parameter to summarize the neutron production behavior over a wide range in neutron energies. Liquid scintillator and water seem to be within 30% over most of the energy range with the largest discrepancies near 100 MeV neutron energy. Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkans Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM C Integrated Neutron Energy Flux in CaCO3, Iron, and Lead I 10 MeV CaCO3 has well-tracked resonant structures, suggesting successful implementation in nuclear physics regime. I Iron has inconsistency from 3-7 MeV. Lead has large discrepancy between 10 keV and 5 MeV. I Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkans Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM C Comparison of Geant4/FLUKA for Monoenergetic Muon beam in Liquid Scintillator and Water Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkans Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM C Comparison of Geant4/FLUKA for Monoenergetic Muon beam in Greenstone and Iron Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkans Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM C Cosmogenic Neutron Yield in Liquid Scintillator Experimental Results I Boehm et al, Bezrukov et al, Enikeev et al, Aglietta et al I I KamLand LVD I Borexino Theoretical Predictions I G.T. Zatsepin and O.G Ryazhskaya (1965) I Wang et al (2001) I Mei and Hime (2006) I Geant4 4.9.5p01 I FLUKA 2011.2.17 Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkans Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM C Cosmogenic Neutron Yield in Liquid Scintillator Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkans Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM C Future Work: Non-monoenergetic Muon Beam Comparisons I Experimental results based on average muon energy I Neutron yields for any given spectrum can be derived from convolution of monoenergetic yield I Compare non-monoenergetic yield derived from Soudan or Gran Sasso muon spectrum to monoenergetic convolution as check. Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkans Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM C Website and Contacts UALR Site: http://astro.host.ualr.edu/aarm/ Anton Empl: [email protected] Sarah Lindsay: [email protected] UMN Site: Coming Soon! Anthony Villano: [email protected] Allison Kennedy: [email protected] Allison Kennedy - University of Minnesota Anthony Villano - University of Minnesota Anton Empl - University of Houston Sarah Lindsay - University of Arkans Muon Production of Neutrons in Multiple Targets Geant4/FLUKA Simulation Comparison AARM C
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