SRC/CT Detector Calibration
From GlueXWiki
Overview of subdetectors
| Detector | Tasks | Calibration expert |
|---|---|---|
| CDC | gains, dE/dx, time-to-distance | Simon Taylor |
| FDC | timing, wire plane, pedestals, gain/energy non-linearities | Keigo Mizutani |
| BCAL | timing, z-position, gain ratios, gains, non-linearities | Mark Dalton, Karthik Suresh |
| FCAL | gains/non-linearities/timing | Igal Jaegle |
| TOF | timing offsets, timewalk, attenuation, gain | Beni Zihlmann |
| ST | timing, resolution | Sean Dobbs |
| TAGH | timing offsets, timewalk | Alex Somov |
| TAGM | timing offsets, timewalk | Alex Somov |
| PS | timing offsets, timewalk | Alex Somov |
Monitoring launches
| Version | Date | Files per run | Compared with last version |
|---|---|---|---|
| 00 | during each run | a few percent of all data | created online by RootSpy |
| 01 | shortly after each run | 5 | first launch |
| 02 | 01/07/2022 | 40 | various calibration updates |
| 03 | 02/14/2022 | 5 | various calibration updates |
| 04 | 03/14/2022 | 5 | various calibration updates |
| 05 | 04/22/2022 | 40 (90271-90378), 5 (rest) | various calibration updates |
| 06 | 07/03/2022 | 2 | BCAL calibrations added, photon beam endpoint energy added |
| 07 | 07/27/2022 | 2 | Photon beam endpoint energy corrected, TAGH calibrations of Compton runs added |
- Calibration check spreadsheets:
- Location of output files:
- Monitoring histograms, REST files, standalone files specific to some sub-detectors (one per EVIO file): /mss/halld/offline_monitoring/RunPeriod-2021-11/verXX
- Merged histogram files (one per run): /work/halld/data_monitoring/RunPeriod-2021-11/mon_verXX/rootfiles/
Data quality issues
- Some hardware or software issues can not be fixed by calibrations. Attention is needed during the data analysis
| Subdetector | Issue | Runs affected | Actions required |
|---|---|---|---|
| CDC | TBD | TBD | TBD |
| TAGH | channel 1-16 has two peaks of hits | all runs | TBD |
| TAGM | channel 100 has very low occupancy | all runs | TBD |
