mcp-pmts 8x8 vs 16x16 pi/K

Performance compassion for different pixel size.

  • 3-layer spherical lens with sapphire, r=[62,36]
  • 8x8 vs 16x16 (3.3mmx3.3mm vs 6.6mmx6.6mm pixels) HIQ400, CE=95%
  • pions and kaons @ 6 GeV/c; phi = 0 (no field); vertex y-shifted by 0.5*barwidth (to hit middle of the bar)
  • 0.5 mrad tracking
  • 100 ps time precision
  • geometrical reconstruction with averaged LUT from 15M photons
  • GR with per-PMT and chromatic corrections
  • 22.5k tracks for pdf generation (per each particle species); 5k for determining separation

Photon yield with geometrical reconstruction's cuts:

Without any cuts:




Per-angle plots:

BONUS: SPR @ 30 deg with short bars (1/4 of length)