Difference between revisions of "Run Planning Meeting Notes, Jan 25-Jan 31, 2018"

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#* Both [https://logbooks.jlab.org/entry/3521188 CDC] and [https://logbooks.jlab.org/entry/3521209 FDC] were not tripping HV at 300nA. Currents in both chambers scaled well with the beam current but only FDC current scaled with 2 different AMO radiators.
 
#* Both [https://logbooks.jlab.org/entry/3521188 CDC] and [https://logbooks.jlab.org/entry/3521209 FDC] were not tripping HV at 300nA. Currents in both chambers scaled well with the beam current but only FDC current scaled with 2 different AMO radiators.
 
#* TOF rate was reaching 2.2 MHz. Impact on signal magnitude is yet to be studied.
 
#* TOF rate was reaching 2.2 MHz. Impact on signal magnitude is yet to be studied.
#* TPOL access for 4 hours. Apparently, the noise issue has been [https://logbooks.jlab.org/entry/3521577 fixed]
+
#* TPOL access for 4 hours. Apparently, the noise issue has been [https://logbooks.jlab.org/entry/3521577 fixed]. fADC baselines were recalibrated.
 
#* Fixed TAGM cabling for channels 19 and 21. Translation table was updated [https://logbooks.jlab.org/entry/3521424]
 
#* Fixed TAGM cabling for channels 19 and 21. Translation table was updated [https://logbooks.jlab.org/entry/3521424]
https://logbooks.jlab.org/entry/3521188
+
# Issues:
 +
#* TPOL dead channel [https://logbooks.jlab.org/entry/3521643]
 +
#* TAGM ch.19 is back but ch. 21 is still empty in the latest histos.
 +
#* An epic fight with TAGM scalers and CBREM gui overnight [https://logbooks.jlab.org/entry/3522133], [https://logbooks.jlab.org/entry/3522230], [https://logbooks.jlab.org/entry/3522232], [https://logbooks.jlab.org/entry/3522249], [https://logbooks.jlab.org/entry/3522255], [https://logbooks.jlab.org/entry/3522276]
 +
#* gluonraid3/gluonraid4 switching [https://logbooks.jlab.org/entry/3521972], [https://logbooks.jlab.org/entry/3522110]
 +
#* BTA is still unreliable. Hovanes has [https://logbooks.jlab.org/entry/3521484 fixed a bug]. However, occasionally, BNA is still counted as BANU [https://logbooks.jlab.org/entry/3522375].
 +
#* Harp scan was forgotten on Saturday.
 +
# Run plan:
 +
#* Production, production, production
 +
#* Short Hall access for TPOL dead channel and FCAL bases during either Hall C pass change or beam studies.
 +
#* Empty target run: before or after beam studies?
 +
# Reports:
 +
#* Photon spot for different diamond orientations [https://logbooks.jlab.org/entry/3521988]
 +
#* Nice β vs. p plot [https://logbooks.jlab.org/entry/3522131]
 +
 
  
# Issues
 
TPOL dead channel
 
TAGM ch.19 is back but ch. 21 is still empty in the latest histos.
 
BTA is still unreliable. Hovanes has [https://logbooks.jlab.org/entry/3521484 fixed a bug]. However, occasionally, BNA is still counted as BANU
 
Harp scan was forgotten on Saturday.
 
  
 
== Friday, January  26 ==
 
== Friday, January  26 ==

Revision as of 10:57, 28 January 2018

<- Back to Run Coordination Meetings:Fall2017 Spring2018 Run

Sunday, January 28

  1. Notes from the previous 48 hours:
    • Beam ran smoothly for most of the last 2 days. According to MCC calculations, they delivered 37 hours of actual beam in the last 48 hours. They even proudly posted this: A good hour of beam
    • Friday ABU 12.9, BANU 4.8. Saturday ABU 14.8, BANU 4.0
    • About 3.8 B triggers in the last 2 days. Total: Spreadsheet: number of triggers.
    • 2 hours of 300nA AMO run. Trigger rate >90kHz, event rate 65kHz, L.T. 96% but with DAQ crashes every 10 minutes.
    • Both CDC and FDC were not tripping HV at 300nA. Currents in both chambers scaled well with the beam current but only FDC current scaled with 2 different AMO radiators.
    • TOF rate was reaching 2.2 MHz. Impact on signal magnitude is yet to be studied.
    • TPOL access for 4 hours. Apparently, the noise issue has been fixed. fADC baselines were recalibrated.
    • Fixed TAGM cabling for channels 19 and 21. Translation table was updated [1]
  2. Issues:
    • TPOL dead channel [2]
    • TAGM ch.19 is back but ch. 21 is still empty in the latest histos.
    • An epic fight with TAGM scalers and CBREM gui overnight [3], [4], [5], [6], [7], [8]
    • gluonraid3/gluonraid4 switching [9], [10]
    • BTA is still unreliable. Hovanes has fixed a bug. However, occasionally, BNA is still counted as BANU [11].
    • Harp scan was forgotten on Saturday.
  3. Run plan:
    • Production, production, production
    • Short Hall access for TPOL dead channel and FCAL bases during either Hall C pass change or beam studies.
    • Empty target run: before or after beam studies?
  4. Reports:
    • Photon spot for different diamond orientations [12]
    • Nice β vs. p plot [13]


Friday, January 26

  1. Notes from the previous 24 hours:
    • Beam was mostly up and we were taking production data.
    • From 6pm till 7:30pm, the beam was off to switch Hall B to 5-pass run.
    • At about the same time, 22.5uA were turned on for Hall A.
    • The beam was acceptable but not as good as before [14].
    • Accelerator went down at 5:20am to investigate A -> C bleed-thru. We got beam back at 8am.
    • ABU 15.2 hrs (5.6+5.1+4.5), BANU 3.5 hrs (2.3+0.6+0.6) for the last 3 shifts
    • About 2.4B triggers collected. Total: Spreadsheet: number of triggers.
  2. Issues:
  3. Plan for today:
    • 300nA AMO run together with L1 study from 8am until 10am.
    • Controlled access (with TPOL RADCON sweep) at 10am for:
      • RADCON test
      • TPOL noise
      • TAGM cable connection
    • Return to production after that.
    • Possible Saturday morning access as well.
    • Run plan chart: Week 3
  4. Reports:
  5. Weekend meeting?

Thursday, January 25

  1. Notes from the previous 24 hrs:
    • Beam was off from 9am till 5:20 pm. At the end, Hall A was able to get their 22.5 uA current. Since then, beam was relatively stable.
    • Upon return of the beam, a harp scan was performed: MCC and Our harp. Beam seems to be acceptable.
    • After harp scan, about an hour has been spent on trigger and DAQ studies by Sasha and Sergei.
    • We switched to production running at 7pm and has been taking production data since then.
    • ABU 10.5 hrs (0.7+3.5+6.3), BANU 0.8 hrs (0+0.3+0.5) for the last 3 shifts
    • About 1.2 B triggers collected. Total: Spreadsheet: number of triggers
  2. Issues:
    • A couple of hours of beam time has been lost on fighting with DAQ while starting the next run (java out of memory, rebooting rocks, etc.)
    • Sometime, a histogram or two would disappear in rootspy and reappear after monitoring restart.
    • Once, a coherent edge had to be nudged by more than 50 MeV.
    • BCAL ADC/TDC timing offsets jumped by 32 ns for some modules: [20]
    • TAGM voltages
    • Any other issues?
  3. Short term run plan:
    • TAC run: should we do it today (Halls A and C are down)?
    • 2 hours of AMO 300nA running tomorrow morning.
      • Would it be better to start it at 7am or 8am?
      • Are any configuration changes necessary (HV, etc.)?
      • Who needs to be here for such run?
      • RADCON will follow this run with their Fast access study.
    • Consequent Hall controlled access to fix TPOL noise issue.
    • Simultaneous tagger hall access to fix bad TAGM channels.
    • Possible Saturday morning access as well.
    • Run plan chart: Week 3
  4. Reports: