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MICE

MICE. TECHNICAL UPDATE & ISIS/RAL PLANS. Acknowledge. Belgium Italy Japan The Netherlands Russian Federation Switzerland UK USA. RAL & ISIS. RAL. Harwell. ISIS. Location. Plant…. Control room… Electronics…. ISIS Ring. Experimental Hall. Hall: L = 47 m W = 12 m H = 8 m

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MICE

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  1. MICE TECHNICAL UPDATE &ISIS/RAL PLANS

  2. Acknowledge Belgium Italy Japan The Netherlands Russian Federation Switzerland UK USA

  3. RAL & ISIS RAL Harwell ISIS

  4. Location Plant…. Control room… Electronics….

  5. ISIS Ring

  6. Experimental Hall Hall: L = 47 m W = 12 m H = 8 m S = 564 m2 V = 4512 m3 Two overhead cranes (8 tonnes each)

  7. Mice Hall Existing Area & Beam Line -- is still there - as seen in Summer -- Beam Line used to end of year

  8. Mice Layout

  9. Technical Update & Issues • Beam Line • RF System • Absorbers • Magnets & Cryogenics • Detectors • Infrastructure & Layout • RAL & ISIS Perspectives • Programme • Expected Progress

  10. MICE Layout

  11. Pm < 400 MeV/c Rejection of protons and pions <10% few muons per ms Two solutions: solenoid cryogenics availability release by PSI quadrupoles Beam Line

  12. Purity

  13. Performance Rate depends on muon momentum: e.g. at 200 MeV/c 3000 / ms for solenoid ~300 /ms in quadrupole (assumed a Ti wire target: 1cm long and 4mm Ø) Purity should be better than 90% against scattered protons

  14. Solenoid Magnet Cooling Channel Envelope RF Cavity Cavities Raft Absorber Tuning Bellows RF System 1 MW per cavity 8MW total Low Duty Factor 1-2 ms 1-10 Hz average power ~1kW/Hz

  15. RF Drive 7651 RS2058 EX SPS TH116 DRIVE TO 4 CAVITIES VIA PHASE SHIFTERS AND 70db COUPLERS POWER SPLITTERS AND CIRCULATORS TH781 EX RAL 4kW 10mW 40kW 4MW 400kW 12kV 5kV 40 kV 20 kV LEVEL CONTROL - a possible scheme ~ SOURCE OTHER DRIVE CHAIN R.A. Church RAL

  16. Liquid Hydrogen – Major safety issue ISIS Liquid Hydrogen Moderator Absorber I

  17. Absorber II

  18. Absorber III

  19. Absorber IV

  20. Magnets & Cryogenics Principle Issues – Fringe Fields – Cryogenic Requirements Blue contours: 10 mT Orange: 0.5 mT

  21. Detectors Issues: SiFi - Large cyro cooling needed for VLPCs TPG – HV & flamable gas (next to Lig.H cell)

  22. Infrastructure Plant: Electrical Power Cooling Power Cryogenic System Hydrogen Delivery & Handling Installation phased build of the experiment

  23. ISIS Perspective • Critical Issues: Beam Line • Long Shutdown • Break into ISIS Synchrotron from MICE Hall • Have Shielding available+ • Have Stands available • Competes with other ISIS projects • 300 mA upgrade* • Second Target Station* • RFQ Installation • delivery of contracted neutron amp.hours • * work in synch. vault +2nd target station – friend or foe?

  24. ISIS Schedule

  25. Expected Progress Proposal submitted expect the review to take place Mid Feb till May (?) - international review panel MICE is part of the UK’s Science road map - but funds are not yet allocated Internal Review  green light following international rp Management & Oversight Structure(s) need to be in place

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