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Calibration of the calorimeter by punch-through muons and cosmic muons

Calibration of the calorimeter by punch-through muons and cosmic muons. Doroshenko M. E391 collaboration. Punch-through muon. Beam: muon. Punch-through muon. Gain. CsI crystall: 7x7x30 cm – 168 MeV 5x5x50 cm – 280 MeV. Crystal, ID. Relative error. Crystal, ID. Cosmic muon.

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Calibration of the calorimeter by punch-through muons and cosmic muons

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  1. Calibration of the calorimeter by punch-through muons and cosmic muons Doroshenko M. E391 collaboration

  2. Punch-through muon Beam: muon

  3. Punch-through muon Gain • CsI crystall: • 7x7x30 cm – 168 MeV • 5x5x50 cm – 280 MeV Crystal, ID Relative error Crystal, ID

  4. Cosmic muon Cosmic track and guard region Azimuth angle, rad Chi^2

  5. Cosmic track Normalized reply, pQ/cm Charge, pQ Crystal 7x7 cm Calculated path length, cm

  6. Cosmic muon Gain 5.63 MeV/cm GAIN= --------------- mean pQ/cm Crystal, ID Relative error Crystall,ID

  7. Compare cosmic and punch-through data Punch-through muon gains Cosmic gains

  8. Timing • The delays: • a – from PMT up to A/D card – by cosmic tracks • b – from A/D card up to TDC – by pulser

  9. Timing The signal time of a crystal in a track: • T – trigger timing • R – length of the track • dz – distance from track up to PMT • c – speed of light • c/n – speed of light in CsI +

  10. Timing Time delay, ns HV, volts

  11. Conclusion • ADC calibration • Good agreement between punch-through and cosmic muon’s data • TDC calibration • The cosmic muon tracking allows to estimate the time delays between detectors • The difference in the delays mainly come from the HV settings • The E391a detector works well • Calibration constants from cosmic data is a good enough for first step study physics data • p0 calibration • K0 study

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