Performance of the DIRC@EIC reconstruction for different configurations of the expansion volume. Plate as EV.
- DIRC@EIC, EPIC
- 3-layer spherical lens with sapphire, r=[62,36] and r=[290,190] (for plate-lens-bar)
- EV plate is 893 mm long
- 16x16 pixels MCP-PMTs with HIQ400, CE=95%
- pions and kaons @ 6 GeV/c; phi = 0 (no field); theta = 30 deg; vertex y-shifted by 0.5*barwidth (to hit middle of the bar)
- 0.5 mrad tracking
- 100 ps time precision
- geometrical reconstruction with averaged LUT from 15M photons
- GR with per-PMT and chromatic corrections
- 20k tracks for pdf generation (per each particle species); 5k for determining separation
- with the shorter plate (and older sim): plate as EV
SL lens between bars and plate (EV-plate-SL-bars)
CL lens between bars and plate (EV-plate-CL-bars)
SL lens between EV and plate (EV-SL-plate-bars)
CL lens between EV and plate (EV-CL-plate-bars)
Lens between bars and half thick plate (EV-t2plate-CL-bars and EV-t2plate-SL-bars). In both cases height of the lens is adjusted to the height of the bar:
Lens between bars and half thick plate (EV-t2plate-CL-bars and EV-t2plate-SL-bars) in zoom for CL. Sides of the first and the third layer of the lens are reflective. Second's is absorbing.
Photon yield without cuts:
TI, 20k pdf for each particle species:
TI, 40k pdf for each particle species:
Without lens. TI, 20k pdf for each particle species:
Without lens. TI, 40k pdf for each particle species:
Per-angle plots: