Difference between revisions of "Run Planning Meeting Notes, November 30 - December 7, 2022"

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(Wednesday Dec. 7th)
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= Wednesday Dec. 7th =
 
= Wednesday Dec. 7th =
 
=== Last 24h ===
 
=== Last 24h ===
*Tuesday was spent running on empty target. with ***h of ABU (7am - 7am).
+
*Tuesday was spent running on empty target. Beam was down between 9:45am to 15:00 due to several accelerator issues. In all, we still got ***h of ABU (7am - 7am).
  
 
=== Reports ===
 
=== Reports ===
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=== Issues ===
 
=== Issues ===
*
+
*Tagger magnetic field:
 +
**Starting at, 3:45am [https://logbooks.jlab.org/entry/4097349 Tagger NMR lost its lock.] Then latter, [https://logbooks.jlab.org/entry/4097656 it lost communication]
 +
**At the same time we lost communication with NMR, we also lost communication with accurate magnet current readout (MTAG5Cdctt), but the coarse one (MTAG5CM) is still alive on EPICS gui, so we are using
 +
this one to monitor the tagger magnet situation. Comparison between energy monitorings after Hall D ramp and after the tagger magnet also shows that the tagger field is fine.
 +
*[https://logbooks.jlab.org/entry/4097374 BCAL bad channels]
  
 
=== Short term run plan ===
 
=== Short term run plan ===

Revision as of 08:15, 7 December 2022

Meetings are via ZoomGov: connect (Meeting ID: 160 199 0060 / Passcode 8394)

MCC whiteboard

Hall D counting room white board

Hall D Logbook

Back to Run Coordination Meetings:Fall2022

Wednesday Dec. 7th

Last 24h

  • Tuesday was spent running on empty target. Beam was down between 9:45am to 15:00 due to several accelerator issues. In all, we still got ***h of ABU (7am - 7am).

Reports

Issues

  • Tagger magnetic field:
    • Starting at, 3:45am Tagger NMR lost its lock. Then latter, it lost communication
    • At the same time we lost communication with NMR, we also lost communication with accurate magnet current readout (MTAG5Cdctt), but the coarse one (MTAG5CM) is still alive on EPICS gui, so we are using

this one to monitor the tagger magnet situation. Comparison between energy monitorings after Hall D ramp and after the tagger magnet also shows that the tagger field is fine.

Short term run plan

  • Work during Today's RF recovery (from 8am to 4pm):
    • Hall (Rapid Access should be sufficient):
      • DIRC checkout (Justin+1, 30min).
      • Mark Dalton, to change one of the BCal fadc (30min).
      • A. Somov, Vlad, Lubomir, Sergei and Arshak: work in the PS test area (~1h).
      • Mark Steven: walkthrough for OPS.
      • Tim and Eugene will check the manlift (30min)
      • Tim and Sacha will check bu how much FCal can be pushed back (for some tentative PrimEx systematic measurements).
    • Tagger:
      • Modules tested by Beni Saturday needs to be screwed back in.
      • Two broken power supplies need to be surveyed and (hopefully) cleared for release by RadCon.

Tentative longer term run plan

  • TAC run?
  • Luminosity study?
  • Fall 2022 run period ends on Dec. 19th, 7am.

Tuesday Dec. 6th

Last 24h

  • Monday was very efficient, with 20h of ABU (7am - 7am), and beamtime spent on production on full target until 16:30 and then run on empty target.

Reports

  • Update on electronic support? (Eugene)

Issues

Short term run plan

  • Work Wednesday during RF recovery (from 8am to 4pm):
    • Hall (Rapid Access should be sufficient):
      • DIRC checkout (Justin+1, 30min).
      • Mark Dalton, to change one of the BCal fadc (30min).
      • A. Somov, Vlad, Lubomir, Sergei and Arshak: work in the PS test area (~1h).
      • Mark Steven: walkthrough for OPS.
      • Tim and Eugene will check the manlift (30min)
      • Tim and Sacha will check bu how much FCal can be pushed back (for some tentative PrimEx systematic measurements).
    • Tagger:
      • Modules tested by Beni Saturday needs to be screwed back in.
      • Two broken power supplies need to be surveyed and (hopefully) cleared for release by RadCon.

Tentative longer term run plan

  • TAC run?
  • Luminosity study?
  • Fall 2022 run period ends on Dec. 19th, 7am.

Monday Dec. 5th

Last 72h

  • Friday, Saturday and Sunday were spent mostly with production on full target. 49 of ABU (Sat.7am - Monday 7am).
  • Biggest ABU loss occurred Saturday due to a dead hodoscope HV crate. Fixing it took a long time because we have no off-work-hours electronic support (see report below).
  • Hall C re-started running Friday around 8pm. Now Hall A, C and D are running concurrently.

Reports

Issues

Short term run plan

  • Empty target run?
  • Wednesday during RF recovery (Control Access should be sufficient):
    • DIRC work.
    • Beam off for more than 1h: rapid access for A. Somov, Vlad, Lubomir, Sergei and Arshak for oportunistic work in the PS test area.

Tentative longer term run plan

  • 8h of RF recovery Wednesday Dec. 7th, from 8am to 4pm.
  • TAC run?
  • Luminosity study?
  • Fall 2022 run period ends on Dec. 19th, 7am.

Friday Dec. 2nd

Last 24h

  • Thursday was spent mostly with production on full target. It was an efficient day, with 17.8h of ABU (7am-7am).
  • A. Somov did a low beam current test of the Active Colim. high gain in anticipation of a future TAC run. It looks good.
  • Hall C was supposed to get back to running in mid-swing shift, which would be followed by us doing Harp scans (last ones done: Oct. 21st), but it did not happen (Hall C vacuum issue).

Reports

Issues

  • The FDC fadc installed Wednesday by Naomi and Lubomir needed baseline calibration. Done during swing shift (Sergei/Lubomir).
  • cdc p_diff alarms are becoming rarer: 1 (day shift) + 1 (swing shift) + 0 reported in owl shift + 1 early riser.

Short term run plan

  • Hall C is expected to be back to running ??at some point??.
  • Harp scan after Hall C beam is tuned (last harps done on Nov. 21st, but Transmission is fine.)
  • FDC fadc: 20 min raw mode run with beam. Beni will analyse it and determine if the fadc needs to be replaced
  • If beam is off, we have opportunistic work:
    • Beam off for more than 1h: rapid access for A. Somov and Vlad for ??
    • Beam off for more than 2h: rapid access for Lubomir or Beni IF FDC fadc needs to be changed
    • Beam off for more than 2h and RadCon is available, need to survey fadc to removed them from the Hall (Lubomir/Codi)

Tentative longer term run plan

  • Possible RF recovery Wednesday Dec. 7th.
  • TAC run
  • Luminosity study

Thursday Dec. 1st

Last 24h

Reports

Issues

  • The new FDC fadc is worst than the one replaced (Naomi/Lubomir). The problem is only for raw mode run.
  • Many cdc p_diff alarms (e.g. 0.8 alarm/hour during swing and owl shifts) leading to runs often shorter than 2h (this has already been discussed several time. This is just a report).

Run plan

  • Hall C is expected to be back to running during swing shift today.
  • 20 min test at low beam current/high Active Colim. gain to see if adjustment are needed (A. Somov)?
  • Last harp scan was done on Nov. 21st. Should we do a new one? (Transmission is fine.)
  • Luminosity study?