run 415

Performance and calibration studies for run 415 (momentum scan @ 25 degree).

  • CERN 18
  • S415, bar with 3-layer spherical lens
  • p/pi @ 25 degree polar angle
  • geometrical reconstruction
  • delta t selection with s = 0.5 ns
  • with beam direction correction
  • with per-PMT Cherenkov angle correction

Performance for the run 415:

Geomentrical reconstruction:

Time imaging:

Per-angle plots:


Steps scan of the lens. Separation power of the time imaging as a function of lens's steps:

Rotation scan of the prototype. Separation power of the time imaging as a function of prototype rotation relative to initial one: