run 332 (2017) 3LS

Performance for run 332, a 3LS + bar configuration from 2017 CERN test beam. Compared to different geant4 simulations and to results of 2018 CERN test beam.

  • CERN 17
  • S332, S310, bar with 3-layer spherical lens, 4x3 MCP-PMT layout
  • p/pi @ 7 GeV/c
  • delta t selection with s = 0.5 ns
  • with beam direction correction
  • with per-PMT Cherenkov angle correction

Photon yield after geometrical reconstruction:

SPR:

Separation power using Geometrical Reconstruction:

Separation power using Time Imaging:

Separation power using Time Imaging with hodo cut:

Separation power using Time Imaging with individual per-pmt time resolution:

Example of Cherenkov angle distribution for 2017 (top) and 2018 (bottom) MCP layout. Theta = 20 deg:

Cherenkov track resolution (data, r310):

Cherenkov track resolution (data, r310) with hodoscope cut (6x7 fiber):

Simulation with 1.5 mrad beam divergence:

2017 configuration only (R310 with hodoscope cut (6x7 fiber)). Photon yield after geometrical reconstruction:

Photon yield after time imaging (no cuts):

SPR:

Separation power using Geometrical Reconstruction:

Separation power using Time Imaging: