m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ M. Apollonio – MICE Operations Manager University of Oxford MICE beam line commissioning

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ goals and design: ∙ muon beam features ∙ target ∙ optics ∙ diffuser status of beam line remarks on target operation first MICE shifts [14-15/3, 29/3, 2/4, 4/4] conclusions layout

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ desired features P  = [140 MeV/c, 240 MeV/c],  p = +/- 10% easily tunable matched emittance: 1 mm rad <  N < 10 mm rad deliverable to MICE high purity muon beam high rate “600 muons” per target actuation [1 Hz, 1 ms window] acceptable losses for ISIS Beam Features Beamline Target Optics Diffuser Beamline Status Conclusions

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/  –  decay beam line adopted … inspired by previous projects PSI uE4 TRIUMF  beam lines RAL-RIKEN  beam line MICE beam line constituted by four parts 1.  production/capture 2.  decay/  capture 3.  transport  N generation / matching Beam Features Beamline Target Optics Diffuser Beamline Status Conclusions

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Beam Features Beamline Target Optics Diffuser Beamline Status Conclusions  production/capture  decay  transport match to MICE

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ upstream beamline (in the synchrotron vault) a) target Station: p on titanium blade   + p high P   high P   small exit angle ~25 o b) 1 st Quadrupole Triplet Q1-Q2-Q3 first focussing: maximise acceptance before the decay solenoid c) 1 st Dipole D1 first momentum selection: 60 o bending B 1 [select  ]  B 2 [select  ] 1  production/capture Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion 2  decay channel   Maximise number of muons in decay section: highest decay solenoid field 5 T consistent with controllable  beam 25 o

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/  transport 4 highest  momenta  allow selection of 'backward' going  for higher purity & higher fluxes. Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion 99 %

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ match to MICE Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion Q4-Q9 define the optics prior to the diffuser diffuser used to inflate initial emittance in a controlled fashion variety of final configurations and several momenta  Five thicknesses of Pb  Changeable via remote control

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Stepper motor Actuator Bellows New beam-pipe Target Station Top Bearing Bottom Bearing Magnets Coils Water Cooling Simplified Diagram of the Internal Mechanics Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion Sheffield University

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion 10 ms 20 ms target working principle 1 ms titanium blade dipping at 1 Hz in the ISIS proton beam should intercept just ~1ms of ISIS accelerated beam withdrawal must be quick to avoid scraping next filling  extreme accelerations (80g) beam loss must comply with ISIS requirements

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion target issues MICE target must operate with no harm for ISIS parasitic mode mechanical stress generated metal dust in the first target tests this required an improved design two new target stations are in preparation: T2a will be installed in the ISIS vault T2b will serve as a demonstrator to check T2a reliability (3x actuations) both should be ready in ~ 1 month MICE is presently allowed to produce beam losses < 50 mV on ISIS BLMs special care has been taken to cope with this limit

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion [K. Tilley, MICE Beamline Review, IC 2007]  optics  optics

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion determine thicknesses (T)   =1.4 mm rad x x’

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion [MA, MICE Beamline Review, IC 2007] Diffuser Plates Thicknesses in ( ,P) space

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion Oxford University

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ IC2: >29/3 IC1: 29/3 BM1: >29/3 GVA1: > 4/4GVA2: > 29/3 BM2:>29/3 Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion MICE beamline detector locations

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/  MICE has been given 5 shift times so far: 14-15/3, 29/3, 2-4/4 Summary of 14-15/3 shift operations: - power failure on D1 supply  no beam line  focus on target - Q1-3 inoperative - target successfully run in synchronization with the beam - depth and delay of target dip investigated to limit by any beam loss monitor reading <50 mV - limit reasonably stable and not oversensitive to dip depth - ran target at a good stable setting and a frequency of 50/128Hz (ISIS at 50Hz) - verified target hitting properly end of one ISIS fill without scraping following one - operation mode: MICE in parasitic mode. - radiation survey soon after shift (3679 target pulses) showed no significant increase in radiation - cabling for Beam Monitors and future detectors done - the successful operation of the target shows we can use it for our purposes with no harm for ISIS (parasitic mode): fundamental for future operations Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion Target Dip Depth and Delay

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ target depth vs time ISIS filling integrated BLM from ISIS MCR MICE target dipping into ISIS beam P. Hodgson no difference in beam loss at injection W or W/O target Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Summary of 29/3 shift operations: - D1, D2, Q4-5-6 powered and tested - Q6 showed water leak !  cut triplet out: only D1 and D2 to test proton selection - Beam Monitors (Fermilab) and Beam Counters (IC + Geneva) installed - D1 and D2 powered up: D1 set at 400 A, D2 scanned to find the maximum rate [4 ms gate] - use of remote control system to operate dipoles - first counts on beam monitors - first evidence of selected protons at the end of DSA - total actuations: ~ operations with dipoles and definition of particle transport from target to end of DSA (in agreement with calculations for selected momentum ~ 480 MeV/c) Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ TARGET control Dipoles control Beam Monitor and IC counter displays

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/  Summary of 2-4/4 shifts operations: - GVA1 counter installed (with proper mu-metal shield) - Cherenkov counters ON - establish target depth and delay - re-establish dipole configuration (400A,170A) = 480 MeV/c - first pions in the Cherenkov counterA - start radiation survey - stopped! due to ISIS beam failure - re-establish previous conditions - survey: completed! - D2 scan [2 ms gate]: verify reproducibility - MICE detectors DAQ turned ON - radiation survey completed (main goal of these shifts)  no radiation detected [next page] - clear control of the dipole line - first pions seen in the Cherenkov - DAQ exercised - very preliminary estimates of POT (G4Beamline): order of per dip (2 ms) [need to check vs counter efficiency] - NB: 600 good muons require POT 2/4: ~2000 actuations 4/4: ~6000 actuations Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/  Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion “Herewith radiation survey carried out on Friday 4 April with target dipping. Nothing obvious. But should re-measure with machine at 50 pps rather than at 50/32 pps, and also if increase extent of target dip.” MICE HALL RADIATION SURVEY. DATE: 04/04/2008 TIME: HRS BEAM STATUS: 1.6 Hz 5µa. MICE TGT: IN. MONITORS: NEUTRON MONITOR 5, RO-10 C726, TELETECTOR 612. ZONEµSV/HR nµSV/HR γ 1< <1 SURVEYOR: J.KENT from D. Findlay’s mail on MICE Radiation Survey

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ GVA2 beam monitor CKOV 1a PMT1 CKOV 1a PMT2 CKOV 1a PMT3 Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion  seen in the Cherenkov Detector April 2 nd 2008

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ D1 D2 Q4 Q1 Q2 Q3 DS Q5Q6Q7Q8Q9 cold test start: 21/4, electrical test to follow MICE magnet status 17/4/2008 superconducting solenoid Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion  Q9  Q8  Q7  Q6  Q5  Q4  D2  D1 Q3 Q2 Q1 commissionedRemote control Soak testPolarity check PS current Magnet cooling PS cooling Magnet completeted not completed to be done

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion MICE Hall on 20/2/2008

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion MICE beamline upstream section

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion Mississippi Team at work [Cherenkov]Fermilab Team [Beam Monitors] … mice at work

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion IC beam counter and Decay Solenoid entrance Installing Beam Monitors in the DSA

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion summary ∙ a tremendous amount of work in the last few months ∙ all beam line magnets in place ∙ 3 quadrupole-triplets, 2 dipoles, decay solenoid ∙ first transported protons on March 29 th ∙ initial complement of beam line detectors in place … still a lot to be done next steps ∙ complete magnet commissioning ∙ commission T2a & T2b ∙ TOF0,1 installation ∙ diffuser commissioning ∙ remotely operable beam stop, collimators, correctors

m.apollonioMICE Funding Agency Committee Meeting - RAL 18/4/ Muon Beam Features Beamline Target Optics Diffuser State of Beamline Conclusion Acknowledgements many thanks to: RAL people (PPD, Cryogenics, Design, ISIS), MERIT contractors, Electrical contractors, Daresbury Lab, MICE collaborators … … and all who made this possible