Difference between revisions of "Run Planning Meeting Notes, November 11 - November 17, 2021"

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(Monday November 15)
(Monday November 15)
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#* after the [https://logbooks.jlab.org/entry/3941683 colimator scan] (Fri 13:30-16:30) restored old quad settings (10% transmission increase).
 
#* after the [https://logbooks.jlab.org/entry/3941683 colimator scan] (Fri 13:30-16:30) restored old quad settings (10% transmission increase).
 
#* writing on tape stopped Saturday morning (disks can take up to 3 days running)
 
#* writing on tape stopped Saturday morning (disks can take up to 3 days running)
#* higher than normal trip rate Saturday/Sunday
+
#* higher than normal trip rate Saturday/Sunday ([https://logbooks.jlab.org/entry/3942599]) - a cavity can't be re-tuned - access to fix it at 9:00
 +
#* the only big downtime - 3h last night
 +
#* HV trips last night
 
#Issues:
 
#Issues:
 
#* writing on tape
 
#* writing on tape
 
# [https://halldweb.jlab.org/wiki/index.php/SRC/CT_Run_Plan Plan:]  
 
# [https://halldweb.jlab.org/wiki/index.php/SRC/CT_Run_Plan Plan:]  
#* expect no/bad beam day shift (RF working on cavities)
+
#* expect no beam 9-10(:30) (RF working the cavitiy) then possibly some beam during tuning
 
#* BCM calibration for Hall C energy measurements 14:30-15:30
 
#* BCM calibration for Hall C energy measurements 14:30-15:30
 
#* Continue production at 150nA on diamond
 
#* Continue production at 150nA on diamond

Revision as of 09:29, 15 November 2021

Monday November 15

  1. Last 72h:
    • recorded 6.2B triggers on diamond and 140M on AMO (starting 17:30 on Friday)
    • after the colimator scan (Fri 13:30-16:30) restored old quad settings (10% transmission increase).
    • writing on tape stopped Saturday morning (disks can take up to 3 days running)
    • higher than normal trip rate Saturday/Sunday ([1]) - a cavity can't be re-tuned - access to fix it at 9:00
    • the only big downtime - 3h last night
    • HV trips last night
  2. Issues:
    • writing on tape
  3. Plan:
    • expect no beam 9-10(:30) (RF working the cavitiy) then possibly some beam during tuning
    • BCM calibration for Hall C energy measurements 14:30-15:30
    • Continue production at 150nA on diamond
    • plan for target changes
  4. Analysis update

Friday November 12

  1. Last 24h:
    • recorded 2.2B triggers on diamond
    • improved convergence: before and after
    • ... but the transmission went down by ~15% [2], [3]
    • ccdb for 9000+ runs [4]
    • TAGH timing offset changed [5]
    • restoring communications with FCAL bases [6]
  2. Issues:
    • bad f250 in TAGH [7] - no longer an issue (Sasha power-cycled the crate)
    • transmission - Hovanes will do AC scan when the beam is back after 10am - profiler doesn't lock has to be fixed at that time, as well
  3. Plan:
    • Down starting at 10am: for 1+ hours (Hall A changes to 4 passes) - FCAL items will be surveyed
    • Continue production at 150nA on diamond
  4. Analysis update

Thursday November 11

  1. Last 24h:
    • Down till 3:30pm:
      • 10 FCAL bases replaced [8]
      • CDC/FDC? gas mix alarm [9]
    • Harp scan [10]
    • Recorded 800M+ events with diamond/amo (LHe4 target)
    • lock on AC disabled this morning [11]
  2. Issues:
    • bad f250 in TAGH [12]
  3. Plan:
    • Continue production at 150nA on diamond w/o AMO (next AMO run Nov 14)
    • nudge the coherent peak every time when changing 0/90 to 45/125 and PERP to PARA
    • Expect 1+ hours down when Hall A changes to 4 passes - not clear when