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 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 Development of test plan at this WS Adding diagnostic at ceramic RF window Adding diagnostic at ceramic RF window RF frequency variation as a function of average RF power (Be window heating) RF frequency variation as a function of average RF power (Be window heating) 2 MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010

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

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

5. 201-MHz Cavity Programs MICE cavities 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 Fabrication of six prototype tuners starts soon – Cavity post-processing at LBNL Surface cleaning, EP and cavity assembly Surface cleaning, EP and cavity assembly – Cavity tuning Low power RF measurements of all MICE cavities Low power RF measurements of all MICE cavities 5 MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010

6. MICE Cavity Fabrication MICE Cavity Fabrication 6 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 Design progress of a single cavity vacuum vessel for RF tests at MTA or CERN 7 MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010

8. 201-MHz Cavity Programs 8 MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010 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 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 Single cavity vacuum vessel superimposed between the magnet coils Single cavity vacuum vessel superimposed between the magnet coils 82cm 79cm

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 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 – … 9 MICE Video Meeting, D. Li, Lawrence Berkeley National Lab, November 18, 2010