1. Spectrometer Solenoid Prep Work at RAL and LBNL Steve Virostek Lawrence Berkeley National Lab Steve Virostek Lawrence Berkeley National Lab MICE VC May 7, 2015 MICE VC May 7, 2015

2. LBNL MICE VC 7 May ‘15 - 2 -- 2 - Spectrometer Solenoid Update  Steve Virostek  LBNL TopicsTopics Background Info Background Info Insulating vacuum Insulating vacuum Helium circuit Helium circuit Cryocooler compressors Cryocooler compressors Cryocooler Update Cryocooler Update Background Info Background Info Insulating vacuum Insulating vacuum Helium circuit Helium circuit Cryocooler compressors Cryocooler compressors Cryocooler Update Cryocooler Update

3. LBNL MICE VC 7 May ‘15 - 3 -- 3 - Spectrometer Solenoid Update  Steve Virostek  LBNL Background Info Some tasks remained after 10/14 trip to RAL by LBNL techs (K. McCombs, A. Williams) Some tasks remained after 10/14 trip to RAL by LBNL techs (K. McCombs, A. Williams) Techs are currently at RAL from April 27 th through May 8 th (2 weeks) Techs are currently at RAL from April 27 th through May 8 th (2 weeks) Goal is to get magnets fully operational and ready for cooldown Goal is to get magnets fully operational and ready for cooldown Some work still to be completed at LBNL related to the cryocoolers Some work still to be completed at LBNL related to the cryocoolers Some tasks remained after 10/14 trip to RAL by LBNL techs (K. McCombs, A. Williams) Some tasks remained after 10/14 trip to RAL by LBNL techs (K. McCombs, A. Williams) Techs are currently at RAL from April 27 th through May 8 th (2 weeks) Techs are currently at RAL from April 27 th through May 8 th (2 weeks) Goal is to get magnets fully operational and ready for cooldown Goal is to get magnets fully operational and ready for cooldown Some work still to be completed at LBNL related to the cryocoolers Some work still to be completed at LBNL related to the cryocoolers

4. LBNL MICE VC 7 May ‘15 - 4 -- 4 - Spectrometer Solenoid Update  Steve Virostek  LBNL VacuumVacuum Replace all four power feedthroughs on SS2 Replace all four power feedthroughs on SS2 Install manual 6” gate valves on each vacuum gauge tree Install manual 6” gate valves on each vacuum gauge tree Install vacuum burst disks on each magnet Install vacuum burst disks on each magnet Install G-10 strain reliefs on vacuum side of power leads - both magnets Install G-10 strain reliefs on vacuum side of power leads - both magnets Leak check after all vacuum work is completed Leak check after all vacuum work is completed Replace all four power feedthroughs on SS2 Replace all four power feedthroughs on SS2 Install manual 6” gate valves on each vacuum gauge tree Install manual 6” gate valves on each vacuum gauge tree Install vacuum burst disks on each magnet Install vacuum burst disks on each magnet Install G-10 strain reliefs on vacuum side of power leads - both magnets Install G-10 strain reliefs on vacuum side of power leads - both magnets Leak check after all vacuum work is completed Leak check after all vacuum work is completed

5. LBNL MICE VC 7 May ‘15 - 5 -- 5 - Spectrometer Solenoid Update  Steve Virostek  LBNL Ceramic Power Feedthrus

6. LBNL MICE VC 7 May ‘15 - 6 -- 6 - Spectrometer Solenoid Update  Steve Virostek  LBNL Feedthru Strain Relief Recurring damage to feedthrus likely due to forces from warm leads inside vacuum Recurring damage to feedthrus likely due to forces from warm leads inside vacuum Custom made G-10 strain reliefs will prevent large moments from being transmitted to fragile ceramic insulation Custom made G-10 strain reliefs will prevent large moments from being transmitted to fragile ceramic insulation Recurring damage to feedthrus likely due to forces from warm leads inside vacuum Recurring damage to feedthrus likely due to forces from warm leads inside vacuum Custom made G-10 strain reliefs will prevent large moments from being transmitted to fragile ceramic insulation Custom made G-10 strain reliefs will prevent large moments from being transmitted to fragile ceramic insulation

7. LBNL MICE VC 7 May ‘15 - 7 -- 7 - Spectrometer Solenoid Update  Steve Virostek  LBNL Vacuum Gauge Tree

8. LBNL MICE VC 7 May ‘15 - 8 -- 8 - Spectrometer Solenoid Update  Steve Virostek  LBNL Helium Circuit Change cold head O-rings and clean cold head surfaces Change cold head O-rings and clean cold head surfaces Install foam insulators on all cold heads Install foam insulators on all cold heads Install all cold heads Install all cold heads Extend SS2 Exhaust Line Extend SS2 Exhaust Line Install SS2 pressure transducers Install SS2 pressure transducers Leak check helium circuit after all helium circuit work is done Leak check helium circuit after all helium circuit work is done Change cold head O-rings and clean cold head surfaces Change cold head O-rings and clean cold head surfaces Install foam insulators on all cold heads Install foam insulators on all cold heads Install all cold heads Install all cold heads Extend SS2 Exhaust Line Extend SS2 Exhaust Line Install SS2 pressure transducers Install SS2 pressure transducers Leak check helium circuit after all helium circuit work is done Leak check helium circuit after all helium circuit work is done

9. LBNL MICE VC 7 May ‘15 - 9 -- 9 - Spectrometer Solenoid Update  Steve Virostek  LBNL Cryocooler Insulation

10. LBNL MICE VC 7 May ‘15 - 10 - Spectrometer Solenoid Update  Steve Virostek  LBNL CompressorsCompressors Establish power to compressors Establish power to compressors Set up compressor water cooling Set up compressor water cooling Lay out compressor hoses Lay out compressor hoses Route compressor motor cables Route compressor motor cables Establish power to compressors Establish power to compressors Set up compressor water cooling Set up compressor water cooling Lay out compressor hoses Lay out compressor hoses Route compressor motor cables Route compressor motor cables

11. LBNL MICE VC 7 May ‘15 - 11 - Spectrometer Solenoid Update  Steve Virostek  LBNL Bellows Leak A small leak was found on the SS1 single stage cooler bellows A small leak was found on the SS1 single stage cooler bellows Replacement is very difficult, and part is not readily available Replacement is very difficult, and part is not readily available LBNL techs carried out a repair in place using vacuum epoxy LBNL techs carried out a repair in place using vacuum epoxy A small leak was found on the SS1 single stage cooler bellows A small leak was found on the SS1 single stage cooler bellows Replacement is very difficult, and part is not readily available Replacement is very difficult, and part is not readily available LBNL techs carried out a repair in place using vacuum epoxy LBNL techs carried out a repair in place using vacuum epoxy

12. LBNL MICE VC 7 May ‘15 - 12 - Spectrometer Solenoid Update  Steve Virostek  LBNL Cryocooler Update Recent cooler tests completed at LBNL Recent cooler tests completed at LBNL 2 of 3 heads were underperforming 2 of 3 heads were underperforming Poorly performing heads are on the way to Cryomech for refurb Poorly performing heads are on the way to Cryomech for refurb 3 rd head found to provide 70 mW additional cooling at 4K w/insulation 3 rd head found to provide 70 mW additional cooling at 4K w/insulation Insulation added to all heads at RAL Insulation added to all heads at RAL Recent cooler tests completed at LBNL Recent cooler tests completed at LBNL 2 of 3 heads were underperforming 2 of 3 heads were underperforming Poorly performing heads are on the way to Cryomech for refurb Poorly performing heads are on the way to Cryomech for refurb 3 rd head found to provide 70 mW additional cooling at 4K w/insulation 3 rd head found to provide 70 mW additional cooling at 4K w/insulation Insulation added to all heads at RAL Insulation added to all heads at RAL

13. LBNL MICE VC 7 May ‘15 - 13 - Spectrometer Solenoid Update  Steve Virostek  LBNL Cryocooler Update To date, LBNL has sent the following to RAL: To date, LBNL has sent the following to RAL: 10 ea PT-415 compressors 10 ea PT-415 compressors 9 ea PT-415 cooler heads 9 ea PT-415 cooler heads 2 ea AL-330 single stage heads 2 ea AL-330 single stage heads 1 ea AL-330 compressor 1 ea AL-330 compressor Associated hoses Associated hoses FNAL purchased & sent a spare PT-415 head FNAL purchased & sent a spare PT-415 head To date, LBNL has sent the following to RAL: To date, LBNL has sent the following to RAL: 10 ea PT-415 compressors 10 ea PT-415 compressors 9 ea PT-415 cooler heads 9 ea PT-415 cooler heads 2 ea AL-330 single stage heads 2 ea AL-330 single stage heads 1 ea AL-330 compressor 1 ea AL-330 compressor Associated hoses Associated hoses FNAL purchased & sent a spare PT-415 head FNAL purchased & sent a spare PT-415 head

14. LBNL MICE VC 7 May ‘15 - 14 - Spectrometer Solenoid Update  Steve Virostek  LBNL Cryocooler Update LBNL will be sending the following to RAL in the coming months: LBNL will be sending the following to RAL in the coming months: 2 ea PT-415 cooler heads (after refurb & test) 2 ea PT-415 cooler heads (after refurb & test) 1 ea PT-415 compressor (after head testing) 1 ea PT-415 compressor (after head testing) 1 ea AL-330 compressor (DOE property issue) 1 ea AL-330 compressor (DOE property issue) One pair of PT-415 hoses One pair of PT-415 hoses LBNL will be sending the following to RAL in the coming months: LBNL will be sending the following to RAL in the coming months: 2 ea PT-415 cooler heads (after refurb & test) 2 ea PT-415 cooler heads (after refurb & test) 1 ea PT-415 compressor (after head testing) 1 ea PT-415 compressor (after head testing) 1 ea AL-330 compressor (DOE property issue) 1 ea AL-330 compressor (DOE property issue) One pair of PT-415 hoses One pair of PT-415 hoses