realistic time presision

Performance of the Barrel DIRC for bars with realistic timing precision.

  • PandaRoot simulations without field
  • configuration with narrow bars, 3 layer spherical lens, and 8 MCPs layout with ~17 mm gap
  • Nlak33A, default radii = [95,50]; radii of the ordered lens prototype = [94.5,47.3]( see comparision)
  • pions and kaons @ p = 3.5 GeV/c @ phi = 10.825 deg
  • geometrical and time-imaging reconstruction with full-simulated pdfs
  • 5M samples are used for the LUT generations
  • 30k tracks for pdf generation (per each particle species); 1.5k for determining separation
  • ~2 mrad tracking resolution
  • QE=18(24)% ( black curve). CE=95%
  • spatial QE = 1

Data from Albert:

Superimposed:

Performance as a function of polar angle:

Geometrical reconstruction:

Time imaging:

2 Gaussian vs. raw histogram as input for time smearing. Input histogram:

Performance as a function of polar angle:

Geometrical reconstruction:

Time imaging:

Time imaging likelihood distribution (22 deg) for 100 ps Gaussian (top) and for raw histogram smearing (bottom):