Spectrometer Solonoid 2 Status

Spectrometer
Solonoid 2
Status
Pierrick Hanlet
14 March 2013
Outline
SS2 acceptance tests
● system stable
● magnetic stray field measurements
● concerns/issues
● warming tests
● what's next?
● conclusions
●
14/03/13
Pierrick M. Hanlet
2
Success
SS2 – We did it!!!
successfully ramped to peak current
● ramped back down to Flip Mode
● 24 hour soak test
● next: ramp to Solenoid Mode
●
●
M1 and M2 currents exchanged
2 hour soak test
● ramp to 0A
●
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Pierrick M. Hanlet
3
SS2 Ramps
SS2 final ramp to flip mode
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Pierrick M. Hanlet
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SS2 Soak Test
SS2 24hr soak test
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SS2 Ramps
SS2 final acceptance ramp cycle
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6
SS2 Training History
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SS2 Final Training
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Monitoring
monitoring
is stable
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SS2 Ramps
SS2 systems are stable
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Magnetic Fields
Preliminary
• At ~275A in the C coil, magnetic
field measurements were made
• ~22G outside of control rack
• ~2-3G inside control rack
• Maria led team to perform
measurements at full flip mode
◆ more to follow
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Pierrick M. Hanlet
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Concerns/Issues
• Irregularities with computer stability
• Power supply issues
◆ AMI 420s – mostly at start up
▲not really a problem
◆ Lakeshores randomly start ramping
◆ Lakeshores software control not
reliable
▲this is a problem
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PSU Issues
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Next?
• Fix power supplies
• Warming/offline tests
• Reproducibility tests
• Tests with SS State Machine
• Mapping: Still uncertain at this time
◆ Map at Wang, LBNL, MICE?
• Document differences between
stand-alone and final MICE
configuration
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SS2 Warming
SS2 warming cycles
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Conclusions
SS2 passed acceptance tests!!!
● System stable and warming
● A few remaining concerns
●
Upgrades in progress
● Where/when to map?
●
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Pierrick M. Hanlet
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