Performance and calibration studies for run 403.
- CERN 18
- S403, bar with 3-layer spherical lens
- p/pi @ 7 GeV/c
- geometrical reconstruction
- delta t selection with s = 0.5 ns
- with beam direction correction
- with per-PMT Cherenkov angle correction
![](/~rdzhigad/data/prt/r403/join_scan_403_02/nph.png)
Using different roughness of the radiator:
![](/~rdzhigad/data/prt/r403/nph_roughness.png)
![](/~rdzhigad/data/prt/r403/join_scan_403_02/spr.png)
Geomentrical reconstruction:
![](/~rdzhigad/data/prt/r403/join_scan_403_02/sep_gr.png)
![](/~rdzhigad/data/prt/r403/sep_gr_roughness.png)
Using different sigma of the Gaussian PDF:
![](/~rdzhigad/data/prt/r403/sep_gr_sigma.png)
Time imaging:
![](/~rdzhigad/data/prt/r403/join_scan_403_02/sep_ti.png)
Last week performance:Show/Hide
![](/~rdzhigad/data/prt/r403/j_per_pmt_chrom/nph.png)
![](/~rdzhigad/data/prt/r403/j_per_pmt_chrom/spr.png)
Geomentrical reconstruction:
![](/~rdzhigad/data/prt/r403/j_per_pmt_chrom/sep_gr.png)
Time imaging:
![](/~rdzhigad/data/prt/r403/j_per_pmt_chrom/sep_ti.png)
Lens step scan: Show/Hide
![](/~rdzhigad/data/prt/lens_step/sep.png)
![](/~rdzhigad/data/prt/lens_step/spr.png)
For X:
![](/~rdzhigad/data/prt/lens_step/join_scan_x/sep.png)
![](/~rdzhigad/data/prt/lens_step/join_scan_x/spr.png)
Prototype rotation scan: Show/Hide
Without per-pmt Chereckov angle correction:
With per-pmt Chereckov angle correction:
Cherenkov track resolution for beam data (black) and simulation (red):Show/Hide
20,40,60 deg data with improved fitting:
![](/~rdzhigad/data/prt/r403/gres_20_60.png)
Older plots:
![](/~rdzhigad/data/prt/r403/reee.png)
Cherenkov track resolution simulation without multiple scattering and ideal tracking resolution (blue):
![](/~rdzhigad/data/prt/r403/reee_ii.png)
Reconstructed Cherenkov angle (simulation):
![](/~rdzhigad/data/prt/r403/gcan.png)
Tracking resolution using only 20 deg data set (simulation):
Reconstruction of a single event (proton @ 20 deg @ 7 GeV/c) with different shift of charged particle direction. Shift along theta direction:
Shift along phi direction: