Difference between revisions of "Run Planning Meeting Notes, Nov 29-Dec 4, 2018"
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(→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 | # Comp Cal Status | ||
| − | #* LED signal can be seen by all but one channel. | + | #* LED signal can be seen by all but one channel . |
#* Empty target run overnight, snake pattern voltage check (now is on the third row) | #* Empty target run overnight, snake pattern voltage check (now is on the third row) | ||
#* Sasha's log entry: https://logbooks.jlab.org/entry/3634609 | #* Sasha's log entry: https://logbooks.jlab.org/entry/3634609 | ||
Revision as of 09:44, 4 December 2018
Friday, Nov 30 at 8:45
- Comp Cal installation
- Completed at 6pm yesterday
- First sight of beam (by Comp Cal): https://logbooks.jlab.org/entry/3633247
- Swing and Overnight Running
- 15 nA on Al V-wire (full running condition).
- Lost beam around 2am (due to radiation damaged valve position sensor).
- FCAL is down:
- Monitoring current draw on CAN bus [Matt]
- Rapid access is arrange between 10am - noon.
- Run Plan:
- https://halldweb.jlab.org/primexd/run_plan/Run_Plan_Fall_2018-v5.pdf
- Beam requested today: 2nA on the foil.
- Cryo
- solenoid helium fill test this morning: https://logbooks.jlab.org/entry/3633314
Monday, Dec 3 at 8:45
- 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?
- Target
- Be target installation (tentative date is Thursday)
- LH2 Cooling and when?
- Empty target data during the target colling process?
- Accelerator
- Beam study 9am-2pm
- Energy change next Monday
- Planned hall access:
- Alex: hall tour at 1:30
- Sean/Stuart: checking the cable for the tagger hodoscope (not scheduled)
- Hall tour tomorrow?
- 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
- 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 (Planed by Chris, modified by Tim and Alexandre)
- 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 pumpe
- 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
