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MICE Beam Line Optics & Performance

MICE Beam Line Optics & Performance. Performance Requirements. Momentum Range: Muons: 170 – 390 MeV/c (Pions: < 700 MeV/c backwards decay) dp/p ~ 10% Purity: Clean  R( m ) » R( p ) | R(p) Rates: Few muons per m s. Particle Production. Lahet Production Energy: 600-700-800

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MICE Beam Line Optics & Performance

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  1. MICE Beam LineOptics & Performance Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  2. Performance Requirements Momentum Range: Muons: 170 – 390 MeV/c (Pions: < 700 MeV/c backwards decay) dp/p ~ 10% Purity: Clean  R(m) » R(p) | R(p) Rates: Few muons per ms Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  3. Particle Production Lahet Production Energy: 600-700-800 Production Angle: 40-30-20 Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  4. Useful Production Target area illuminated: 2 × 2 mm2 Beam Area : 150mm Ø Expect : 5×109 protons/cycle on target [cycle=20ms] [2.5×1013 protons in machine per cycle] In 1 ms @1.5 MHz 1,500 rotations of machine proton flux ~10 × p+ flux ~few × p- flux (depends on momentum) Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  5. Relative Magnitude – forward particles Relative Number P (MeV/c) Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  6. Relative Magnitude – 17-23 deg. Relative Number P (MeV/c) Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  7. Solenoid Beam Line 5T (max) solenoid, 5m long Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  8. Proton/Pion Transport 10% Dp/p Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  9. Quadrupole Beam Line Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  10. Proton/Pion Transmission Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  11. Relative m+ (and p+ bgd) as a fn of the initial and final momentum selection Note: D2 is fixed to the momentum of the muon. The transmission of p and m is plotted as a fn of the pion momentum selected by D1. 300 MeV/c m+ p+ D1 Solenoid Pp+ MeV/c D2 m+ 200 MeV/c m+ Pp+ MeV/c Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  12. Relative Performance Proton (& p+) rejection seems complete (~1 in 104) Performance of Quadrupole Channel Compared to Solenoid: Quads ~ few % cf the Solenoid Channel. Should be better at higher m momentum. Current estimate of Performance: ~ ½ quoted in July (~75/ms30-40/ms) ~ ± 5% dp/p ~ better background rejection Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  13. Beam Time Structure ~200 ns ~100 ns ~1.5 MHz for ~ 1 or 2 ms Repeated every 20 ms Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  14. Beam Line Components Quadrupole magnets (2 or more – have several) & Dipole magnets(2) exist - believed to be ok - currently in use - will be checked & refurbished if needed New power supplies will be obtained New stands for elements needed Vacuum System replaced Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  15. Target Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  16. Beam Plane Proposal to allow beam height to be increased to >1.4m Small v angle Compensating twist Solenoid || to horizontal Horizontal plane Proton beam into sheet Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  17. Beam Plane II Proton beam Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  18. Muon Beam Layout Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  19. Vacuum & Machine Protection Muon Beam Vacuum System Window & connection Synchrotron Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  20. Vacuum System Dipole Dipole fastvalve SC solenoid 10-6 torr window 330 l/s turbopump TP Controller plc Scrollpump gauge controller Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  21. Protection - detonation fast valve Pressure wave window ISIS MICE Beam Line Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  22. Beam Line Control System Local Alarms PSU Modicon Console PSU PSU MCR PLC Vac System X - Terminal / PC Remote Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  23. Integration with ISIS ISIS runs independently of MICE MICE Target intercepts small area of beam & is thin – allowed to dip into beam – crew control – protection mechanisms – beam loss monitors – three cycles over the limit and ISIS stops Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  24. Clear out the hall Long shutdown -Decouple existing beam lineCivil Work - door into synchrotronInstall Shielding and Restablish beam line Aim to provide a muon beam for 2004/5 Time Line Issues I Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  25. Second Long ShutdownInstall a solenoid Channel to have higher intensity muons Time Line Issues II Choice of PSI Solenoid or a copy of the RIKEN solenoid Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  26. RIKEN Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

  27. Time LineA possible scenario 2003 2004 2005 Shutdown prepare Installation Muon beam I Build up Install Solenoid Muon beam II Paul Drumm, MICE Collaboration Meeting Berkeley, 2002

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