Performance and calibration studies for runs with different azimuthal angle of the prototype.
- CERN 18
- bar with 3-layer spherical lens attached to the edge of the prism
- 2.5 (S409), 5 (S406), 10 (S407), 15 (408) degree azimuthal angle
- p/pi @ 7 GeV/c
- geometrical and TI reconstruction
- delta t selection with s = 0.5 ns
- with beam direction correction
- with per-PMT Cherenkov angle correction
Performance compared to phi = 0 (all beam data):
Geometrical reconstruction:
Time imaging:
Comparison to geant4 simulation:
Geometrical reconstruction:
Time imaging:
Per-angle plots:
Rotation scans for prototype at 15 deg azhimuthal angle. Separation power of the geometrical reconstruction as a function of the azhimuthal angle deviation from nominal value (after per-PMT Cherenkov angle correction):
Polar angle scan:
Example for 30 degree without per-PMT Cherenkov angle correction:
