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MICE Beamline Analysis – SEPT04

MICE Beamline Analysis – SEPT04. Tom Roberts Muons, Inc. September 22, 2004. Outline. Summary of the SEPT04 beamline design Summary of this simulation Summary of rates Upstream PID distributions Downstream PID disributions Summary of PID Counter Losses.

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MICE Beamline Analysis – SEPT04

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  1. MICE Beamline Analysis – SEPT04 Tom Roberts Muons, Inc. September 22, 2004 MICE Beamline Analysis -- SEPT04

  2. Outline • Summary of the SEPT04 beamline design • Summary of this simulation • Summary of rates • Upstream PID distributions • Downstream PID disributions • Summary of PID Counter Losses MICE Beamline Analysis -- SEPT04

  3. Summary of the SEPT04 Beamline Design * The intent of the design is for 206 MeV/c in Tracker1, but various energy losses were not accounted for in the design; this is the actual value achieved. MICE Beamline Analysis -- SEPT04

  4. Summary of this Simulation • A significant improvement in realism: • First guess of the beamline vacuum, windows, air gaps, etc. • More detailed implementation of Tracker1 and Tracker2 • Vacuum with windows • 5 planes, 1.5 mm scintillator each, located as in the TRD (Sept 04) • TRD (Sept 04) configurations for everything except a few minor things (absorber and RF window shapes, RF Cavity size, Cherenkov2 modeled as a circle) MICE Beamline Analysis -- SEPT04

  5. Summary of Rates Values are events per millisecond of Good Target and good RF. Good μ+ = TargetDet & TOF0 & TOF1 & Tracker1 & Tracker2 & TOF2 & TOF1(μ+) & TOF2(μ+) MICE Beamline Analysis -- SEPT04

  6. TOF0 Distributions (Every blue dot lies right on top of a red dot.) MICE Beamline Analysis -- SEPT04

  7. Cherenkov1 Distributions (Every blue dot lies right on top of a red dot.) MICE Beamline Analysis -- SEPT04

  8. TOF1 Distributions (Every blue dot lies right on top of a red dot.) MICE Beamline Analysis -- SEPT04

  9. Downstream PID Distributions • Same simulation, except: • The downstream IronShield is physically removed • Its effect on the magnetic field remains • TOFX is added to the trigger; it is 1.5 by 1.5 meters, 1 mm thick, made of Air, located 1mm ahead of where the downstream IronShield would have been. • TOF2 is extended to be 1.5 by 1.5 meters • Cherenkov2 is extended to be 1.5 meters in diameter • Calorimeter is extended to be 2.0 by 2.0 meters • Relaxed Trigger: Good mu+ requires only 14 hits out of 18 counters (i.e. nothing after TOFX is required, no cut on particle type) MICE Beamline Analysis -- SEPT04

  10. TOFX Distributions – 1 (Every blue dot lies right on top of a red dot.) MICE Beamline Analysis -- SEPT04

  11. TOFX Distributions – 2 MICE Beamline Analysis -- SEPT04

  12. TOF2 Distributions (Every blue dot lies right on top of a red dot.) MICE Beamline Analysis -- SEPT04

  13. Cherenkov2 Distributions (Every blue dot lies right on top of a red dot.) MICE Beamline Analysis -- SEPT04

  14. Calorimeter Distributions (Every blue dot lies right on top of a red dot.) MICE Beamline Analysis -- SEPT04

  15. PID Counter Losses * Circle inscribed in the octagon. (Losses were determined by histogramming X and Y or R for each counter and counting tracks that exceed the TRD size.) (Remember the relaxed Trigger considers mu->e decays to be “Good mu+”.) MICE Beamline Analysis -- SEPT04

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