Performance compassion with and without magnetic field. The polar angle of the charged track for case with field is adjusted so it hits the same bar as without field.
- DIRC@EIC, CORE
- field data: https://eic.jlab.org/core/index.php/Solenoid @ 2.5
- 3-layer spherical lens with sapphire, r=[62,36]
- 3 mm pixels HIQ400, CE=95%
- pions and kaons @ 6 GeV/c; phi = 0 (no field); phi = 2.5 (with field)
- 0.5 mrad and 0.25 mrad
- 100 ps time precision
- geometrical reconstruction with averaged LUT from 15M photons
- GR with per-PMT and chromatic corrections
- 15k tracks for pdf generation (per each particle species); 10k for determining separation
Example of event display with b-field with 30 degree track
Photon yield with geometrical reconstruction's cuts:
Without any cuts:
GR:
TI:
