Difference between revisions of "Run Planning Meeting Notes, Nov 29-Dec 4, 2018"

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(→‎Monday, Dec 4 at 8:45)
(→‎Tuesday, Dec 4 at 8:45)
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==Tuesday, Dec 4 at 8:45 ==
 
==Tuesday, Dec 4 at 8:45 ==
 +
# Comp Cal Status
 +
#* LED signal can be seen by all but one channel.
 +
#* Empty target run overnight, snake pattern voltage check (now is on the third row)
 +
#* Sasha's log entry: https://logbooks.jlab.org/entry/3634609
 +
 +
# Target installation Plan for next Monday: 70 hours
 +
 +
#*    Hall opens at 8am Monday;
 +
#*    With Radcon support, Hall D techs remove beamline and retract target cryostat;
 +
#*    Hall D techs uncable and remove start counter from cryostat;
 +
#*    Target Group secures H2 gas, inerts the target piping, and bleeds vacuum chamber to atmospheric pressure;
 +
#*    With Radcon support, Target Group removes foam portion of cryostat;
 +
#*    With Radcon support, TG removes superinsulation around target cell;
 +
#*    With Radcon support, TG removes LH2 target cell;
 +
#*    TG mounts beryllium sample in place of LH2 cell;
 +
#*    Location of Be sample fiducialized against outside markers on cryostat;
 +
#*    Foam portion of cryostat is put back in place, vacuum pumps on;
 +
#*    Start counter put back in place, cables attached;
 +
#*    Target inserted into solenoid
 +
#*    Survey adjusts position in solenoid
 +
#*    Beamline assembled and pumped
 +
  
−
# Target installation Plan
 
 
# TAGM trigger issue (Richard): https://logbooks.jlab.org/entry/3633836
 
# TAGM trigger issue (Richard): https://logbooks.jlab.org/entry/3633836
 +
 +
# TAGH HV/signal cabling check (requested by Sean).
 +
#* A hardware expert is required to go with Stuart.
 +
 +
# MCC promised to looked into the low current monitor at 5C11B

Revision as of 09:33, 4 December 2018

Friday, Nov 30 at 8:45

  1. Comp Cal installation
    • Completed at 6pm yesterday
  2. First sight of beam (by Comp Cal): https://logbooks.jlab.org/entry/3633247
  3. Swing and Overnight Running
    • 15 nA on Al V-wire (full running condition).
    • Lost beam around 2am (due to radiation damaged valve position sensor).
  4. FCAL is down:
  5. Run Plan:
  6. Cryo


Monday, Dec 3 at 8:45

  1. Comp Cal Status
    • Friday: cell-by-cell calibration
    • Friday overnight: successful TAC run
    • Saturday: completed cell-by-cell calibration
    • Saturday overnight: no beam / TAC rate issue (due to beam characteristic change).
    • Sunday: completed voltage matching
    • Sunday overnight: voltage crosscheck data taken
    • Data ready?
  2. Target
    • Be target installation (tentative date is Thursday)
    • LH2 Cooling and when?
      • Empty target data during the target colling process?
  3. Accelerator
    • Beam study 9am-2pm
    • Energy change next Monday
  4. Planned hall access:
    • Alex: hall tour at 1:30
    • Sean/Stuart: checking the cable for the tagger hodoscope (not scheduled)
    • Hall tour tomorrow?
  5. Other idea of using the low current beam
    • Ken: The coherent peak test near the tagger hodoscope low energy boundary (preferably after the energy change) with ~2nA current


Tuesday, Dec 4 at 8:45

  1. Comp Cal Status
  1. Target installation Plan for next Monday: 70 hours
    • Hall opens at 8am Monday;
    • With Radcon support, Hall D techs remove beamline and retract target cryostat;
    • Hall D techs uncable and remove start counter from cryostat;
    • Target Group secures H2 gas, inerts the target piping, and bleeds vacuum chamber to atmospheric pressure;
    • With Radcon support, Target Group removes foam portion of cryostat;
    • With Radcon support, TG removes superinsulation around target cell;
    • With Radcon support, TG removes LH2 target cell;
    • TG mounts beryllium sample in place of LH2 cell;
    • Location of Be sample fiducialized against outside markers on cryostat;
    • Foam portion of cryostat is put back in place, vacuum pumps on;
    • Start counter put back in place, cables attached;
    • Target inserted into solenoid
    • Survey adjusts position in solenoid
    • Beamline assembled and pumped


  1. TAGM trigger issue (Richard): https://logbooks.jlab.org/entry/3633836
  1. TAGH HV/signal cabling check (requested by Sean).
    • A hardware expert is required to go with Stuart.
  1. MCC promised to looked into the low current monitor at 5C11B
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