Difference between revisions of "Run Planning Meeting Notes, April 3-April 10, 2016"

Revision as of 07:31, 5 April 2016

Tuesday, April 5

1. Accelerator Status
   1. No beam since 9am Monday due to re-tune
   2. hot spot found in accelerator downstream of 5th pass separator
   3. Hall-A will go to 2-pass beam then 4-pass beam (Hall-D is only capable of taking 5-pass beam)
2. Hall-D/GlueX items
   1. Short access yesterday for walktrhough and FCAL maintainence
   2. Target warmed to >80K for at least 90 minutes to melt any potential Nitrogen ice
   3. Beam intensity fluctuations ...
   4. other systems?
3. Run Plan
   1. Re-establish good photon beam
   2. FCAL test run short (Adesh)
   3. PS magnet current studies ~1hr (Alex S.)
   4. TRD run ~1hr (Lubomir, Sergey)
   5. DAQ Studies ~1hr (Sergey, David)
   6. Microscope alignment short (Alex B.)
   7. Production running
4. Offline analysis?
5. AOB?

Monday, April 4

1. Accelerator Status
   1. No beam or poorly positioned beam until ~3:30am Sunday April 3
   2. Bleedthrough from Hall-A
   3. Accelerator experts convening this morning to form plan for fixing issues with beam. May be disruptive today or tomorrow morning as they implement plan
   4. Hall A gets priority Today
2. Hall-D/GlueX items
   1. Completed empty target run with amorphous radiator
   2. Difficulty getting consistent PARA and PERP at same location on JD70-118. Switch to JD70-119.
   3. CDC HV trips frequently. Current trip levels had inadvertently been reduced to 2uA (fixed)
   4. beam intensity fluctuations
      • Hovanes suggests regular harp scans, including two ACC harps in D beamline, MCC must do those
      • Request accelerator formalize scan procedure for 5C11 and 5C11B. Todd will write something up
   5. other systems?
3. Run Plan
   1. empty target run
   2. Satellite peak study (move beam)
   3. PS magnet current studies
   4. TRD run
   5. DAQ Studies
   6. Microscope alignment (Alex B.)
   7. Production running
4. Offline analysis?
5. AOB?

Sunday, April 3

1. Accelerator Status
   1. Beam was gone until ~2am Saturday April 2
   2. Frequent RF trips, poor profile scans, poor enhancement
   3. Spotty or unacceptably poor beam from 13:00 Saturday to 3:30 Sunday (Issues with bleedthrough from other halls (?))
   4. Improved beam profile
   5. Hall A gets priority Monday
2. Hall-D/GlueX items
   1. Completed empty target run with both PARA and PERP orientations
   2. Difficulty getting consistent PARA and PERP at same location on JD70-118. Switch to JD70-119.
   3. CDC HV trips frequently
   4. beam intensity fluctuations
   5. tagger harp scan shows sigma_x = 0.9 mm, sigma_y = 1.1 mm, possibly better focusing on collimator
      • Hovanes suggests regular harp scans, including two ACC harps in D beamline, MCC must do those
   6. Shift-takers run comments: Discussion deferred
   7. other systems?
3. Run Plan
   1. empty target run
   2. PS magnet current studies
   3. TRD run
   4. Satellite peak study (move beam)
   5. Microscope alignment (Alex B.)
   6. production running
4. Offline analysis?
5. AOB?