Difference between revisions of "SRC/CT Detector Calibration"

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=Overview of subdetectors=
+
==Overview of subdetectors==
 
*Old page: https://halldweb.jlab.org/wiki/index.php/SRC/CT_Calibrations
 
*Old page: https://halldweb.jlab.org/wiki/index.php/SRC/CT_Calibrations
 
{| class="wikitable"
 
{| class="wikitable"
−
! Detector !! Calibrations !! Hall D Expert !! Helper/Monitoring
+
! Detector !! Tasks !! Calibration expert
−
|-
+
−
| '''BCAL''' || Timing/z-position/gain ratios || Mark Dalton || Nathaly
+
−
|-
+
−
| '''BCAL''' || gains/non-linearities || Regina group [Karthik] || Nathaly
+
−
|-
+
−
| '''CDC''' || gains and dE/dx || Simon Taylor || GWU-Phoebe/Axel
+
 
|-
 
|-
−
| '''CDC''' || Time-to-distance || Simon Taylor || GWU-Phoebe/Axel
+
| CDC || gains, dE/dx, time-to-distance || Simon Taylor
 
|-  
 
|-  
−
| '''FDC''' || Timing || Keigo Mizutani || Jackson Pybus
+
| FDC || timing, wire plane, pedestals, gain/energy non-linearities || Keigo Mizutani
 
|-  
 
|-  
−
| '''FCAL''' || gains/non-linearities/timing || Igal Jaegle || Carlos Ayerbe
+
| BCAL || timing, z-position, gain ratios, gains, non-linearities || Mark Dalton, Karthik Suresh
 
|-  
 
|-  
−
| '''PS/PSC''' || timing || Alex Somov/Olga Cortes || GWU-Phoebe/Axel
+
| FCAL || gains/non-linearities/timing || Igal Jaegle
 
|-  
 
|-  
−
| '''ST''' || timing || Mark Ito || Bo
+
| TOF || timing offsets, timewalk, attenuation, gain || Beni Zihlmann
 
|-  
 
|-  
−
| '''ST''' || resolution || Mark Ito || Bo
+
| ST || timing, resolution || Sean Dobbs
 
|-  
 
|-  
−
| '''TAGH''' || timing || Alex Somov|| Bhesha Devkota
+
| TAGH || timing offsets, timewalk || Alex Somov
 
|-  
 
|-  
−
| '''TAGM''' || timing || Alex Somov || Bo Yu
+
| TAGM || timing offsets, timewalk || Alex Somov
 
|-  
 
|-  
−
| '''TOF''' || timing/gains || Beni Zihlmann || Jackson
+
| PS || timing offsets, timewalk || Alex Somov
 
|}
 
|}
  
−
=Monitoring launches=
+
==Monitoring launches==
 
{| class="wikitable"
 
{| class="wikitable"
 
! Version !! Date  !! Files per run !! Compared with last version
 
! Version !! Date  !! Files per run !! Compared with last version
 
|-  
 
|-  
−
| '''BCAL''' || Timing/z-position/gain ratios || Mark Dalton || Nathaly
+
| 00 || during each run || a few percent of all data || created online by RootSpy
 
|-  
 
|-  
−
| '''BCAL''' || gains/non-linearities || Regina group [Karthik] || Nathaly
+
| 01 || shortly after each run || 5 || first launch
 +
|-  
 +
| 02 || 01/07/2022 || 40 || various calibration updates
 
|-
 
|-
−
| '''CDC''' || gains and dE/dx || Simon Taylor || GWU-Phoebe/Axel
+
| 03 || 02/14/2022 || 5 || various calibration updates
 
|-
 
|-
−
| '''CDC''' || Time-to-distance || Simon Taylor || GWU-Phoebe/Axel
+
| 04 || 03/14/2022 || 5 || various calibration updates
 
|-  
 
|-  
−
| '''FDC''' || Timing || Keigo Mizutani || Jackson Pybus
+
| 05 || 04/22/2022 || 40 (90271-90378), 5 (rest) || various calibration updates
 
|-  
 
|-  
−
| '''FCAL''' || gains/non-linearities/timing || Igal Jaegle || Carlos Ayerbe
+
| 06 || 07/03/2022 || 2 || BCAL calibrations added, photon beam endpoint energy added
 
|-  
 
|-  
−
| '''PS/PSC''' || timing || Alex Somov/Olga Cortes || GWU-Phoebe/Axel
+
| 07 || 07/27/2022 || 2 || Photon beam endpoint energy corrected, TAGH calibrations of Compton runs added
 +
|}
 +
*Calibration check spreadsheets:
 +
**[https://docs.google.com/spreadsheets/d/1M3v9vpBmoHbHk0gjJHNsgAjq5bQL2UxcaRrUPeM4EaQ/edit#gid=1665922131 Ver 03 to 05]
 +
**[https://docs.google.com/spreadsheets/d/1xLmNGh-CiAD_ETUqL8kRnG2ZTuaKGLvymY2JdJ47w0Y/edit#gid=1665922131 Ver 06 to 07]
 +
*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/
 +
**Plot browser: https://halldweb.jlab.org/data_monitoring/Plot_Browser.html
 +
 
 +
==Data quality issues==
 +
*Some hardware or software issues can not be fixed by calibrations. Attention is needed during the data analysis
 +
{| class="wikitable"
 +
! Subdetector !! Issue  !! Runs affected !! Actions needed
 
|-  
 
|-  
−
| '''ST''' || timing || Mark Ito || Bo
+
| CDC || dE/dx of proton is smaller than normal || 90469-90475 || TBD
 
|-  
 
|-  
−
| '''ST''' || resolution || Mark Ito || Bo
+
| FDC || some strips in plane 5, 12 and 16 are down || all runs || TBD
 
|-  
 
|-  
−
| '''TAGH''' || timing || Alex Somov|| Bhesha Devkota
+
| BCAL || module 12-16 is down || 90512-90513 || TBD
 
|-  
 
|-  
−
| '''TAGM''' || timing || Alex Somov || Bo Yu
+
| TAGH || channel 1-16 has two peaks in TDC-ADC plots || all runs || TBD
 
|-  
 
|-  
−
| '''TOF''' || timing/gains || Beni Zihlmann || Jackson
+
| TAGH || channel 104 has two peaks in TDC-ADC plots || 90117-90453 || TBD
 +
|-
 +
| TAGH || channel 179-185 behaves abnormal due to bad FADC || 90428-90453 || TBD
 +
|-
 +
| TAGH || one channel has abnormal pedestal || 90177-90427 || TBD
 +
|-
 +
| TAGH || one FADC is bad || 90001-90079 || TBD
 +
|-
 +
| TAGM || channel 100 has very low occupancy || all runs || TBD
 +
|-
 +
| TPOL || not included || 90001-90058 || TBD
 
|}
 
|}
−
*ver 01
 
−
*ver 02
 
−
*ver 03
 
−
*ver 04
 
−
*ver 05
 
−
*ver 06
 
−
*ver 07
 
−
 
−
=Data quality issues=
 
−
*Some hardware or software issues can not be fixed by calibrations. Attention is needed during the data analysis
 
−
*CDC
 
−
*TAGH
 
−
*FDC
 
−
 
−
 
−
* '''CDC'''
 
−
** Wire gains (per-channel)
 
−
** Overall gain factors (can skip if online is good enough)
 
−
** Final dE/dx calibrations
 
−
** Time-to-distance
 
−
** Plots 11/02: [https://halldweb.jlab.org/wiki/index.php/File:CDC_calibrationupdate.pdf]
 
−
* '''FDC'''
 
−
** Wire plane calibrations
 
−
** Pedestals
 
−
** "Automated" gain/energy non-linearities
 
−
** Timing
 
−
* '''PS/PSC'''
 
−
** PS timing
 
−
** PSC timing offsets + timewalk
 
−
 
−
* '''TAGH'''
 
−
** timing offsets + timewalk
 
−
* '''TAGM'''
 
−
** timing offsets + timewalk
 
−
* '''TOF'''
 
−
** timing offsets
 
−
** timewalks
 
−
** attenuation corrections
 
−
** gain corrections
 
−
* '''Start Counter'''
 
−
** timing
 
−
** [https://halldweb.jlab.org/wiki/images/b/b7/SC.pdf SC overview]
 

Latest revision as of 13:54, 22 March 2023

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/
    • Plot browser: https://halldweb.jlab.org/data_monitoring/Plot_Browser.html

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 needed
CDC dE/dx of proton is smaller than normal 90469-90475 TBD
FDC some strips in plane 5, 12 and 16 are down all runs TBD
BCAL module 12-16 is down 90512-90513 TBD
TAGH channel 1-16 has two peaks in TDC-ADC plots all runs TBD
TAGH channel 104 has two peaks in TDC-ADC plots 90117-90453 TBD
TAGH channel 179-185 behaves abnormal due to bad FADC 90428-90453 TBD
TAGH one channel has abnormal pedestal 90177-90427 TBD
TAGH one FADC is bad 90001-90079 TBD
TAGM channel 100 has very low occupancy all runs TBD
TPOL not included 90001-90058 TBD
Retrieved from "https://halldweb1.jlab.org/wiki/index.php?title=SRC/CT_Detector_Calibration&oldid=120411"