Scan through the length of the think plate as part of expansion volume.
- DIRC@EIC, EPIC
- 3-layer spherical lens with sapphire vs ideal lens
- 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
Event display for thick plane as EV with 3LS:
![](/~rdzhigad/data/eic/ev3_scan/ev3_3LS.png)
3LS (3 layer spherical lens):
![](/~rdzhigad/data/eic/ev3_scan/ev3_l3_zoom.png)
3LC (3 layer cylindrical lens):
![](/~rdzhigad/data/eic/ev3_scan/ev3_l6_zoom.png)
Ideal lens:
![](/~rdzhigad/data/eic/ev3_scan/ev3_l10_zoom.png)
Hit pattern for a normal prism EV and 3LS (5k 6 GeV/c pions @ 30 deg):
![](/~rdzhigad/data/eic/ev3_scan/hp_ev0_l3_30.png)
Hit pattern for a normal prism+thick plate EV and 3LS:
![](/~rdzhigad/data/eic/ev3_scan/hp_ev3_l3_30.png)
Hit pattern for a normal prism+thick plate EV and ideal 3LS:
![](/~rdzhigad/data/eic/ev3_scan/hp_ev3_l10_30.png)
Scan through the length of the plate-ev with ideal lens. Hit pattern for 5k 6 GeV/c pions at 35 degree polar angle: