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TOF Software and Analysis Tools

TOF Software and Analysis Tools. MICE CM22, Rutherford Appleton Laboratory Sunday 19 October 2008 Mark Rayner. G4MICE Analysis Tools. Particle ID. G4MICE Reconstruction. Calibration. Real Data. G4MICE Simulation. Momentum spectra for KEK data. Time in Tracker Reference Plane.

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TOF Software and Analysis Tools

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  1. TOF Software and Analysis Tools MICE CM22, Rutherford Appleton Laboratory Sunday 19 October 2008 Mark Rayner

  2. G4MICE Analysis Tools Particle ID G4MICE Reconstruction Calibration Real Data G4MICE Simulation Momentum spectra for KEK data Time in Tracker Reference Plane Reconstruction of the angles x’ and y’ Measurement of emittance Longitudinal momentum in TRP Analysis Applications Measurement of optical parameters Reconstruction of RF Phase TofTrack Average muon momentum between TOFs TofSpacePoints Muon time and position in each TOF Hit time in scintillator slabs TofSlabHits TofDigits Time and signal in each PMT DATE Digitization KEK data Simulation GVA data m.rayner1@physics.ox.ac.uk 2

  3. Calibration of the Timing Detector Photomultiplier Tubes Tracker 5x5 TOF counter T1 timing counter Aerogels • KEK tracker test timing detectors • 250 MeV/c e+, m+ and p+ • Assume e+ are ultra-relativistic • The MICE TOFs • KEK method not practical • Laser injection to slab centre

  4. G4MICE Analysis Tools Particle ID G4MICE Reconstruction Calibration Real Data G4MICE Simulation Momentum spectra for KEK data Time in Tracker Reference Plane Reconstruction of the angles x’ and y’ Measurement of emittance Longitudinal momentum in TRP Analysis Applications Measurement of optical parameters Reconstruction of RF Phase TofTrack Average muon momentum between TOFs TofSpacePoints Muon time and position in each TOF Hit time in scintillator slabs TofSlabHits TofDigits Time and signal in each PMT DATE Digitization KEK data Simulation GVA data m.rayner1@physics.ox.ac.uk 4

  5. Momentum Reconstruction Between Timing Detectors m+ p+ p [MeV/c] p [MeV/c] Before TOF0 After TOF1 pTofTrack – pTruth [MeV/c] • KEK tracker test data • The Geneva counters • Expected performance of the MICE TOFs

  6. G4MICE Analysis Tools Particle ID G4MICE Reconstruction Calibration Real Data G4MICE Simulation Momentum spectra for KEK data Time in Tracker Reference Plane Reconstruction of the angles x’ and y’ Measurement of emittance Longitudinal momentum in TRP Analysis Applications Measurement of optical parameters Reconstruction of RF Phase TofTrack Average muon momentum between TOFs TofSpacePoints Muon time and position in each TOF Hit time in scintillator slabs TofSlabHits TofDigits Time and signal in each PMT DATE Digitization KEK data Simulation GVA data m.rayner1@physics.ox.ac.uk 6

  7. The G4MICE Beam Line Between TOF0 and TOF1 Effective phase advance W [rad] Effective focusing strength k [m-2] Effective length l [m] 150 MeV/c 150 300 Defocusing 200 300 250 150 300 300 Focusing 150 Central quadrupole gradient [T/m]

  8. Modelling the Beam Line Between TOF0 and TOF1 –g08 T/m M21 [m-1] TOF0 TOF1 TOF0 TOF1 g09 g07 [T/m] dx/dz g07 [T/m] x [mm] • Use the quadrupole parameterization and linear beam optics to select ideal quadrupole gradients for the measurement of x’=dx/dz • Verify with G4MICE simulations

  9. Angle Reconstruction and Emittance Measurement Reconstructed x’ Total error Error on x’ [radians] Due to Cherenkov Due to timing error Due to tracking error True x’ Due to position error Amplitude [mm] G4MICE reconstruction of trace space using simulated TOF hits True trace space distribution at TOF1 dx/dz x [mm] No Cherenkov

  10. Extrapolation of Time and Momentum to the TRP and RF Muon Photon TOF1 & cage Focus coil RF Tracker Solenoid 1 Electron H2 absorber Tracker 1 • Extrapolate to tracker reference plane for longitudinal emittance • Extrapolate to RF to measure phase and define a bunched beam • Work in progress • Possible methods • Geant4 style stepping algorithm • Transfer matrix style Taylor expansion • Kalman filter

  11. G4MICE Analysis Tools Particle ID G4MICE Reconstruction Calibration Real Data G4MICE Simulation Momentum spectra for KEK data Time in Tracker Reference Plane Reconstruction of the angles x’ and y’ Measurement of emittance Longitudinal momentum in TRP Analysis Applications Measurement of optical parameters Reconstruction of RF Phase TofTrack Average muon momentum between TOFs TofSpacePoints Muon time and position in each TOF Hit time in scintillator slabs TofSlabHits TofDigits Time and signal in each PMT DATE Digitization KEK data Simulation GVA data m.rayner1@physics.ox.ac.uk 11

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