Difference between revisions of "Run Planning Meeting Notes, July 27-August 5, 2020"
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*[https://logbooks.jlab.org/entry/3820171 TagM fixed after 1:30pm-4:4-pm access]. Sergey and Lubomir worked opportunistically in the Hall on TRD during Tagger access. | *[https://logbooks.jlab.org/entry/3820171 TagM fixed after 1:30pm-4:4-pm access]. Sergey and Lubomir worked opportunistically in the Hall on TRD during Tagger access. | ||
*TagM HV scan. | *TagM HV scan. | ||
| + | *[http://zeus.phys.uconn.edu/halld/cobrems/harptool.cgi?harp5C11_xsigma=0.9297&harp5C11_xsigma_err=0.03&harp5C11_ysigma=0.3724&harp5C11_ysigma_err=0.03&harp5C11B_xsigma=0.9896&harp5C11B_xsigma_err=0.15&harp5C11B_ysigma=0.3234&harp5C11B_ysigma_err=0.15&radHarp_xsigma=0.8386&radHarp_xsigma_err=0.02&radHarp_ysigma=0.2405&radHarp_ysigma_err=0.02&harp5C11_spos=102.97&harp5C11B_spos=115.11&emittance_x=0.0038&radHarp_spos=119.7&emittance_y=0.0021&collimator_spos=194.92&fit=fit+and+plot Harp scan] | ||
| + | *Short empty target run (cut short by CEBAF shutting down because of tornado alarm): run 72616, 56M events. | ||
Tasks to be done: | Tasks to be done: | ||
Revision as of 07:46, 4 August 2020
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July 27th-Aug. 2nd
- Beni ramped up the solenoid on Aug. 1st. However, due to a problem with the PXI readout, it was ramped down. The solenoid was ramp-up again (Aug. 2nd) to its nominal 1350A, this time without problem.
- Target was cooled (C. Keith) and latter filled without problem (Aug. 1st)
- Shift Started on Aug. 1st, 8am.
August 1st-2nd : investigating and attempting to fix a problem with the front-end of the TagM. Did two long accesses to tagger, but the problem remains. Due to this, the runplan for August 3-4 has been reorganized
- CW beam arrived around 3am on Aug. 2nd, followed by beam quality checks.
- Radiation levels are good.
- Beam convergence is good
- Beam position optimized (?), however transmission doesn't appear to be optimal
- trigger checked out
- Radiation level study done.
- 15 min calibration runs (in long and production mode) done
- CDC HV scan ongoing.
Issues:
- TagM
- We often get less beam current than requested
- DAQ start run issue: reminder of DIRC mis-communication solution
- Difficulty in setting CDC HV for CDV HV scan, see also Keigo's entry. It was fixed by rebooting the IOC.
Upcoming days:
- Hurricane/tropical storm Isaias
- TagM communication issue
- Week 1 time chart
- Richard plan for Act. Col. test
- Thursday: 1->5 pass change for Hall B. Hall A on-line.
- Tuesday 11th: Maintenance day?
Aug. 3rd
Tasks completed:
- Took 1h "production" (with TagM down) amorphous run.
- Hovanes finalized the optimization of the transmission. Optimal transmission is obtained for:
- Profiler: X = - 1.8 Y = - 2.1
- AC: X = 0.8 Y = -0.4
- TagM fixed after 1:30pm-4:4-pm access. Sergey and Lubomir worked opportunistically in the Hall on TRD during Tagger access.
- TagM HV scan.
- Harp scan
- Short empty target run (cut short by CEBAF shutting down because of tornado alarm): run 72616, 56M events.
Tasks to be done:
- Hovanes to check JD70-105 diamond alignement
- Sacha finalized the trigger check out
- One production cycle at 150nA
- Start regular production.
Issues:
- Instable beam current (since the start of the run)
- Monitoring discrepancy: Hovanes observation, Naomi and Justin replies
- missing evio files
Reports:
Upcoming days:
- Hurricane/tropical storm Isaias
- TagM communication issue
- Week 1 time chart
- Richard plan for Act. Col. test
- Thursday: 1->5 pass change for Hall B. Hall A on-line.
- Tuesday 11th: Maintenance day?
