Cherenkov track resolution

Cherenkov track resolution as a function of polar angle.

  • CERN 18 test beam, Run403
  • geometrical reconstruction
  • delta t selection with s = 0.8 ns
  • Cherenkov angle selection = 50 mrad
  • with beam direction correction
  • with per-PMT Cherenkov angle correction

Cherenkov track resolution:

Per-angle fits: