TOF Software and Analysis Tools

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Presentation transcript:

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

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

Calibration of the Timing Detector Photomultiplier Tubes 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 T1 timing counter Aerogels 5x5 TOF counter Tracker

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

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

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

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

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

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

Extrapolation of Time and Momentum to the TRP and RF TOF1 & cage Tracker Solenoid 1 Tracker 1 Photon Muon Electron Focus coil RF H2 absorber Extrapolation of Time and Momentum to the TRP and RF 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

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