1. MICE Status & Plans MICE-UK paul drumm 15 th September 2004

2. CM Highlights Cryo cooler decision –Not yet finalised –Looks good for magnets –Probably ok for absorber R&D for both absorber & magnets –Helium problem –Keen for VLPC cooling Shielding Resolution –Shielding between tracker & cavities –Shielding of photo tubes from magnets Absorber R&D –Liquid hydrogen filled absorber (MuCOOL) @ MTA

3. Beam Line Initial Assumptions Large  p Amplitude/Momentum Correlation Not so desirable! –Purity & Absolute rate is more important Beam line geometry is now fixed Matching is better understood; –Cannot use full  p or correlation!

4. Magnets & MICE Optics Better understanding of matching & cooling –  p issue –many configuration options Coil Spacing: –Tracker solenoid to focus coil –Tracker solenoid to photo tube shield –Resolved to the better!

5. MICE Hall Layout

6. MICE

7. Gate Valve Issue Module Connection Issue Shield Plates for photo tubes Forces – running; fault; quench

8. Absorber & Focus Coil Significant design progress Incorporated cryocoolers Magnets Absorber Window QA/QC - safety issue Liq. H filled absorber at MTA

9. Focus Coil

10. RF Cavity f m = 200.88 MHz (prior to welding) RF Cavity Progress – welding now done

11. RF Power RF Power baseline –MoU between CCLRC & LBNL Signed Waiting for DoE approval –MoU between CCLRC & LANL to be written HT Power Supplies Clearly not critical & could be delayed

13. Trouble at Mill! MICE Progress dependent on international collaborators This is not as strong as desired in proposal but designed to move MICE forward: –UK: Beam & Infrastructure (for beam line) –UK: Tracker contribution with JP & FNAL… –US: Tracker Solenoid

14. MICE & GW Gateway 0 & 1 spring 04 –Passed on amber scientific & technical international funding  Gateway 2: late December –JP $1M firm –US $2.5M vs $23-24M bid –INFN $? not very likely very soon –Gateway 2 chair positive: beam line decoupled from experiment = muon beam facility for other R&D –$2.5M will mean delay is inevitable; leverage for GW2 bring the 1 st piece of MICE to RAL

15. The positive outlook! Beam line is a valuable asset MICE is only one customer; In the future we might welcome –demonstration of large aperture magnets in particular the FFAG –demonstration of cooling rings, partial or full

16. What should we do? Beam & Infrastructure –Complete all work in synchrotron room; target –Try to complete work on PSI solenoid Cryogenic system expected to be a long delivery item Tracker Contribution –Not a large cost item –Build experience with KEK beam test & KEK magnet at RAL Absorber –Continue design effort –Clearly risk is larger – need to see US hardware being built before closing on tender –Hydride bed R&D – with out pressure!

19. Schedule… In doubt: PSI Solenoid MoU has not been signed – waiting for GW2 Need ~1 year to procure cryogenics Need ~6 months commissioning period (?) Possible that the beam line cannot be completed in time for 2006 shutdown

21. Key points Prepare section of ISIS ring to replace part of straight 7 Develop a target (Sheffield) Design beam line components: Stands Vac system Diagnostics Test – esp. magnets Shutdown 2006: Replace section of Straight 7 Install quad triplet on stands Install tilted dipole on stand run cables & services to magnets rearrange shielding

22. Operating MICE (2006?) MICE Base line –Target dips into beam 1 ms at 1 Hz – as late as possible before extraction –Target consumes ~2% of one pulse Limiting factors: –Limit of beam loss monitors –Limit of instantaneous data rate in MICE Alternative –<<1ms @ few (3) Hz

23. Aims for next CM@RAL Review cryo cooler choice Helium options Robust Cost of Beam & Infrastructure Finally get a tracker choice Examine MICE phase 0 within collaboration Muon beam Characterise beam Validate simulations