TOP resolution

Propagation time resolution as a function of propagation path length

  • DIRC@EIC design; 11 bars; 4x6 MCP-PMT array; 3-layer sperical lens with nlak33
  • 3 mm pixels (Photonis 2 (CE=95%, QE=22%))
  • without time smearing
  • pions/kaons @ 6 GeV/c @ [30-140] deg polar angle

Photons from multiple events (with different polar angle) where collected based on propagation time into different samples and used to determine the TOP resolution. Photon's path distribution:


With monochromatic Cherenkov light (410 nm):

Fits for monochromatic Chereckov light:

Other distributions: