performance map for 2x4 layout

Performance of the Barrel DIRC as a function of the polar angle and momentum for a design with 3 layer spherical lens and 8 MCP-PMTs layout.

  • PandaRoot simulations without field
  • configuration with narrow bars, 3 layer spherical lens, and 8 MCPs layout with ~17 mm gap
  • pions and kaons @ phi = 10.825 deg
  • geometrical reconstruction with 2M LUT
  • time-imaging reconstruction with full-simulated pdfs
  • 30k tracks for pdf generation (per each particle species); 5k for determining separation
  • ~2 mrad tracking resolution
  • realistic time precision
  • standard wavelength QE+0.65 collection efficience vs. HIQ400 + 0.95 CE. See QE curves
  • spatial QE = 1

Time imaging reconstruction with standard QE:

Time imaging reconstruction with HIQ 400:

Geometrical reconstruction with standard QE:

Geometrical reconstruction with HIQ400:

Example of the Cherenkov angle distribution for a low performance region (1 GeV/c, 100 deg)

Kaon's photon yield with standard QE:

Kaon's photon yield with HIQ400:

Pion's photon yield with standard QE:

Pion's photon yield with HIQ400:

Photon yield and separation power using time imaging @ 3.6 GeV/c: