Difference between revisions of "Run Planning Meeting Notes, October 21 - October 27, 2021"

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(Tuesday 26 October)
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#* Bleedthrough
 
#* Bleedthrough
 
# [https://halldweb.jlab.org/primexd/run_plan/Run_Plan_Fall_2021.pdf Plan:]
 
# [https://halldweb.jlab.org/primexd/run_plan/Run_Plan_Fall_2021.pdf Plan:]
#* Continue production at 200nA, solenoid on
+
#* When the beam is back, call Chris Keith to watch the target fill & then continue production at 200nA after the usual checks (radiation levels & harp scans)
  
 
=Monday 25 October=  
 
=Monday 25 October=  

Revision as of 00:11, 26 October 2021

<-- Summer 2021 RC meetings MCC whiteboard

Tuesday 26 October

  1. Last 24h:
  2. Issues:
    • BCAL noise at 10 o'clock
    • Bleedthrough
  3. Plan:
    • When the beam is back, call Chris Keith to watch the target fill & then continue production at 200nA after the usual checks (radiation levels & harp scans)

Monday 25 October

  1. By 1:30 will know what the magnet repair plan is. There is a spare on site. It would take about 2 weeks to swap.
  2. Happenings since Friday morning:
    • Everyone seemed optimistic at Friday's morning meeting.
    • Started filling the target a little before 9:30, with Chris Keith watching, and the shift crew here.
    • We went into controlled access so that Tim could go in to do something for CPP. Sasha also needs to make an access.
    • This looked promising
    • The problem was isolated to a ground fault in magnet YBBS04.
    • Shifts are cancelled until Monday 10am. Monday 10am+ shifts are on standby. Tuesday shifts remain unaltered.
    • The target has been emptied, the solenoid is still on, and the hall is in power permit.
  3. Work done:
  4. Issues:
    • BCAL noise at 10 o'clock
    • Bleedthrough
  5. Plan:
    • VIP visit (NL & Hall B) + arc 7 magnet tests + pass change.
    • Bill asked about changing DIRC water.
    • When the beam is back, call Chris Keith to watch the target fill & then continue production at 200nA after the usual checks (radiation levels & harp scans)

Friday, October 22

  1. Last 24h: Production runs continued smoothly until 2:51pm when an arc magnet tripped. About 7pm the team looking at the power supply found that there was a short in any one of the 42 magnets downstream, they will resume work in the morning. Shifts were cancelled until 9am.
arc 7 trip
  1. Remaining issues:
    • BCAL noise at 10 o'clock
    • Bleedthrough
  2. Plan:

Thursday, October 21

  1. Last 24h:
  2. Remaining issues:
    • Tagger hodoscope time shifts
    • communication with accel. w.r.t. tagger magnet - Paul Vasilauskis (Ops group leader): "I am putting out to my staff to contact the hall if they do need to touch the magnet and am looking into adding wording to the magnet screens"
    • BCAL noise at 10 o'clock
    • Bleedthrough
  3. Plan:
    • When the beam is back continue production at 200nA after the usual checks (radiation levels & harp scans)
    • Continue running with the solenoid on & target full until Friday or later
    • Pass change for A&B Saturday morning (A->4 pass)
    • Expect downtime Monday morning for VIP tour, start time TBC probably ~7am.
    • Ops will need another maintenance day before the energy change