Transcript Spectrometer Solenoid Update MICE Video Conference #143 September 1, 2011 Steve Virostek - LBNL.

Spectrometer Solenoid Update
MICE Video Conference #143
September 1, 2011
Steve Virostek - LBNL
Topics
•Technical progress
- Cold mass opening and mods
- Quench resistor assembly
- Vacuum vessel modifications
- Instrumentation
•Quench analysis write up
•Radiation shield analyses
•Milestones
Technical Progress
•Cold mass
- Cover cut open in the area of the quench resistors
- Original resistor assembly to be removed soon
- Diode assembly to remain in place
•Quench resistor assembly
- Hardware design and fabrication completed at LBNL
- Preliminary assembly now under way
- Installation to begin next week
•Vacuum vessel modifications
- Added penetrations in first vacuum vessel wall complete
- 4th & 5th coolers, larger vacuum ports, prep for end plates
- Modifications to 2nd vacuum vessel under way
•Instrumentation
- Calibration of Cernox sensors nearly complete at FNAL
- Silicon diodes and new LHe level gauges received
Parts for Quench Resistor Assembly
Resistor cooling test
Quench Analysis Write Up
•Spectrometer solenoid quench analyses at LBNL has been
completed by Soren Prestemon and Pan Heng
•Final write up is currently being reviewed
•Several conclusions regarding magnet protection
- Existing passive system provides adequate protection
- Resistor cooling scheme being implemented
- An active, external system will be employed to protect
the HTS leads in case of a lead quench
Radiation Shield Analyses
Stress and displacement
(eddy current forces and
shipping loads)
Eddy current analysis
Thermal analysis
Spectrometer Solenoid Milestones
1. Resistor/Diode Pack with conduction plate installed to Cold
Mass – 14th September
Parts are complete – preparation for installation to start later
this week
2. Cold Mass ready for Helium leak checking – 19th September
3. Machining work on Vacuum Vessel completed – 22nd September
First unit is now complete, second unit is under way
4. Cold Mass ready for MLI wrapping – 23rd September
5. Assembly Starts on Upstream Spectrometer Solenoid – 6th
October
6. Cold Mass and Shield inside the Vacuum Vessel – 25th October