Cherenkov's photon propagation path length
- DIRC@EIC design; 11 bars; 4x6 MCP-PMT array; 3-layer sperical lens with nlak33
- 3 mm pixels (Photonis 2 (CE=95%, QE=22%))
- pions/kaons @ 6 GeV/c
![](/~rdzhigad/data/eic/pathlen/len.png)
Propagation time:
![](/~rdzhigad/data/eic/pathlen/time.png)
Without lens:
![](/~rdzhigad/data/eic/pathlen/len_l0.png)
Without glue joints, with lens:
![](/~rdzhigad/data/eic/pathlen/len_l3_noglue.png)