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Plans for 201-MHz Cavities

Plans for 201-MHz Cavities. Derun Li Center for Beam Physics Lawrence Berkeley National Laboratory November 18, 2010. 201-MHz Cavity Programs . Prototype cavity at the MTA Surface damage on RF coupler and coupler port region Damage on the ceramic RF window

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Plans for 201-MHz Cavities

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  1. Plans for 201-MHz Cavities Derun Li Center for Beam Physics Lawrence Berkeley National Laboratory November 18, 2010

  2. 201-MHz Cavity Programs • Prototype cavity at the MTA • Surface damage on RF coupler and coupler port region • Damage on the ceramic RF window • Data analysis of the existing RF test results • Window inspection tomorrow • RF test plans • Development of test plan at this WS • Adding diagnostic at ceramic RF window • RF frequency variation as a function of average RF power (Be window heating) MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010

  3. 201-MHz Cavity Programs SC CC magnet available by end of 2011 Ceramic RF window, copper sputtered on the window Sparking on loop coupler SC CC magnet Lab G Magnet 201-MHz Cavity MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010

  4. Status of MuCool CC Magnet • The Coil has 96 layers and 166 turns • SC coil winding completed 1 week ago • Al banding arrived China last week • Modification of the ICST test system is under way (making progress, but with delays) • Cryostat design by SINAP, the final design review is scheduled: Dec. 9 & 10 at SINAP, Shanghai • Fabrication of cryostat components and cover plate welding soon • Quench protection • CC assembly procedures • Cold mass test at HIT MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010

  5. 201-MHz Cavity Programs • MICE cavities • Fabrication of ten 201-MHz cavities complete • Received eight Be windows at LBNL • Ten ceramic RF windows ordered • RF coupler design update is under way • RF tuner design and prototype • Fabrication of six prototype tuners starts soon • Cavity post-processing at LBNL • Surface cleaning, EP and cavity assembly • Cavity tuning • Low power RF measurements of all MICE cavities MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010

  6. MICE Cavity Fabrication MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010

  7. 201-MHz Cavity Programs • Design progress of a single cavity vacuum vessel for RF tests at MTA or CERN MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010

  8. 201-MHz Cavity Programs • Single cavity vacuum vessel superimposed between the magnet coils 82cm 79cm • Single RF cavity vacuum vessel will potentially be used in a 3 T large bore magnet to perform RF breakdown test measurements in a magnetic field at CERN in support of the MTA at FNAL or in support of MICE MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010

  9. 201-MHz Cavity Programs • The single cavity vacuum vessel allows us to explore many mechanical design and assembly issues before we have a MICE RFCC module • Tuners • Couplers • Support • Cooling piping • Pumping • Assembly • Fixturing • … MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010

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