- DIRC@EIC design; 11 bars; 4x6 MCP-PMT array; 3-layer sperical lens with nlak33
- 3 mm pixels HIQ400, CE=95%
- 100 ps time precision
- time imaging reconstruction with simulated PDFs (30k for each particle type)
- geometrical reconstruction with averaged LUT from 5M photons
- 0.8 tracking resolution. See track resolution scan for more.
Effect of multiple scattering is determined by calculating angle between v1 and v2:
![](/~rdzhigad/data/eic/multiple_scattering/evt_ms_marks.png)
Examples for pi+ @ 6 GeV/c @ 30 deg and bar thickness of 25 mm:
![](/~rdzhigad/data/eic/multiple_scattering/angle.png)
Polar angle difference:
![](/~rdzhigad/data/eic/multiple_scattering/thetadiff.png)
Polar angle difference vs bar thickness, 6 GeV/c:
![](/~rdzhigad/data/eic/multiple_scattering/d_ms/ms_6gev_30.png)
![](/~rdzhigad/data/eic/multiple_scattering/d_ms/ms_6gev_90.png)
Polar angle difference vs bar thickness, 1 GeV/c:
![](/~rdzhigad/data/eic/multiple_scattering/d_ms/ms_1gev_30.png)
![](/~rdzhigad/data/eic/multiple_scattering/d_ms/ms_1gev_90.png)
Polar angle difference vs momentum (bar thickness = 17 mm):
![](/~rdzhigad/data/eic/multiple_scattering/d_ms_mom/ms_30.png)
Log scale:
![](/~rdzhigad/data/eic/multiple_scattering/d_ms_mom/ms_30_log.png)
Geometrical reconstruction:
![](/~rdzhigad/data/eic/multiple_scattering/join_scan_thickness/nph.png)
![](/~rdzhigad/data/eic/multiple_scattering/join_scan_thickness/spr.png)
![](/~rdzhigad/data/eic/multiple_scattering/join_scan_thickness/sep.png)
Analysis plots (e/pi @ 30 deg @ 1 GeV/c):
Example of the bar with 10 mm thickness:
![](/~rdzhigad/data/eic/multiple_scattering/10mm.png)
Example of the bar with 17 mm thickness:
![](/~rdzhigad/data/eic/multiple_scattering/17mm.png)
Geometrical reconstruction (30 deg polar angle):
![](/~rdzhigad/data/eic/multiple_scattering/fixed/sep_gr.png)
Time imaging (30 deg polar angle):
![](/~rdzhigad/data/eic/multiple_scattering/fixed/sep_ti.png)
With momentum selection. GR:
![](/~rdzhigad/data/eic/multiple_scattering/join_scan_h_ti2z/sep_gr.png)
With momentum selection. TI:
![](/~rdzhigad/data/eic/multiple_scattering/join_scan_h_ti2z/sep_ti.png)
Different plot format. GR:
![](/~rdzhigad/data/eic/multiple_scattering/join_scan_h_ti2z/sep_gr_pik.png)
![](/~rdzhigad/data/eic/multiple_scattering/join_scan_h_ti2z/sep_gr_pie.png)
Different plot format. TI:
![](/~rdzhigad/data/eic/multiple_scattering/join_scan_h_ti2z/sep_ti_pik.png)
![](/~rdzhigad/data/eic/multiple_scattering/join_scan_h_ti2z/sep_ti_pie.png)