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Beam Characterization with the TOFs

Beam Characterization with the TOFs. Mark Rayner CM23 Harbin. Saturday 13 th December Shift. Pions from 13 th December. Positrons from 13 th December. Cable Length Calibration (0,1). Cable Length Calibration (0,0). Cable Length Calibration (1,0). Cable Length Calibration (1,1).

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Beam Characterization with the TOFs

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  1. Beam Characterization with the TOFs Mark Rayner CM23 Harbin TOF Emittance Measurement

  2. Saturday 13th December Shift TOF Emittance Measurement

  3. Pions from 13th December TOF Emittance Measurement

  4. Positrons from 13th December TOF Emittance Measurement

  5. Cable Length Calibration (0,1) TOF Emittance Measurement

  6. Cable Length Calibration (0,0) TOF Emittance Measurement

  7. Cable Length Calibration (1,0) TOF Emittance Measurement

  8. Cable Length Calibration (1,1) TOF Emittance Measurement

  9. p=30MeV/c Transverse momentum (MeV/c) TOF0—TOF1 ‘420MeV/c p+’ mainly pions amplitude 50.0 sigma 196ps mainly muons amplitude 15.2 sigma 157ps e+ calibration…Mean=8m/30cm ns – Dt various p, g>200, b=1 150ps resolution need timewalk correction (and more data!) Time of flight (ns) TOF Emittance Measurement

  10. TOF & Momentum TOF Emittance Measurement

  11. p+ TOF0 dx/dz TOF0 dy/dz TOF0 y (mm) TOF0 x (mm) TOF1 dy/dz TOF1 dx/dz TOF1 x (mm) TOF1 y (mm) TOF Emittance Measurement

  12. m+ TOF0 dx/dz TOF0 dy/dz TOF0 y (mm) TOF0 x (mm) TOF1 dy/dz TOF1 dx/dz TOF1 x (mm) TOF1 y (mm) TOF Emittance Measurement

  13. TOF Beam Charzn Summary • All the tools required for… • Space point/time-of-flight/momentum reconstruction at a glance • Calibrating the TOFs for cable length and testing this calibration • Measuring emittance • …are uploaded to G4MICE and easy to use – see software talk • DAQ and TOF guys are encountering and solving lots of problems • 150 ps time-of-flight resolution due to lack of e+ and time-walk corr. • Momentum measured, dipole spread >20% confirmed • Trace space reconstructed. Next: • Bin carefully, and calculate emittance/optical functions • Error analysis • Re-examine MCs • Take into account emittance growth in Cherenkov TOF Emittance Measurement

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