Difference between revisions of "Run Planning Meeting Notes, June 16 - June 22, 2022"
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− | = | + | =Tuesday June 21= |
#Last 24h: | #Last 24h: | ||
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#*[https://logbooks.jlab.org/entry/4005074 CTOF readout threshold changed in horrible cludge.][https://logbooks.jlab.org/entry/4005306 Worked!] | #*[https://logbooks.jlab.org/entry/4005074 CTOF readout threshold changed in horrible cludge.][https://logbooks.jlab.org/entry/4005306 Worked!] | ||
#*[https://logbooks.jlab.org/entry/4005118 Worked on AC position lock][https://logbooks.jlab.org/entry/4005119 Mysterious behaviour] | #*[https://logbooks.jlab.org/entry/4005118 Worked on AC position lock][https://logbooks.jlab.org/entry/4005119 Mysterious behaviour] | ||
+ | #*TAC setup was begun. Progress made but the TAC run was postponed until today. | ||
#*[https://logbooks.jlab.org/entry/4005201 Could not run in PERP] Getting ion chamber trips. [https://logbooks.jlab.org/entry/4005263][https://logbooks.jlab.org/entry/4005271] | #*[https://logbooks.jlab.org/entry/4005201 Could not run in PERP] Getting ion chamber trips. [https://logbooks.jlab.org/entry/4005263][https://logbooks.jlab.org/entry/4005271] | ||
#Reports | #Reports |
Revision as of 08:43, 21 June 2022
↑ Back to Run Coordination Meetings:Summer2022
Meeting are via ZoomGov: connect (Meeting ID: 160 199 0060 / Passcode 8394)
Hall D counting room white board
Contents
Tuesday June 21
- Last 24h:
- Relatively good beam.
- DIRC barbox alarmDP fluctuation.
- CTOF readout threshold changed in horrible cludge.Worked!
- Worked on AC position lockMysterious behaviour
- TAC setup was begun. Progress made but the TAC run was postponed until today.
- Could not run in PERP Getting ion chamber trips. [1][2]
- Reports
- Issues
- CTOF FP trigger timing change in wrong direction
- 24 tagger channels off. Tagger access tuesday to look at this.
- Plans
- RF recovery Tuesday and machine tuning for Hall C high current.
- Change F1TDCs in Tagger that may be causing live time issues.
- Install helicity fibers in Tagger
- Change HV crate in tagger that is causing issues.
- Accelerator maintenance day Thursday
- RF recovery Tuesday and machine tuning for Hall C high current.
- Commissioning steps temporarily postponed:
- Flux optimization/Act .Col. calibration
- PS and TAGH HV scans
- Bleed-through test: measure bleed-through with A slit as usual and A slit completely closed to see whether using B slit would help.
Monday June 20
- Last 24h:
- CTOF trigger time adjusted
- TOF signal size. To compare with 400 threshold.
- Changes to AC locks. Need to evaluate the impact. [3]
- TAC setup work was done but ran out of time for actual TAC run. That could be done today on Swing.
- Beam returned at 8:30 pm. Smooth production since then.
- Reports
- Issues
- Beam position is unstable
- DAQ live time fluctuations. [4] Tagger access tuesday to look at this.
- 24 tagger channels off. Tagger access tuesday to look at this.
- Plans
- RF recovery Tuesday and machine tuning for Hall C high current.
- Change F1TDCs in Tagger that may be causing live time issues.
- Install helicity fibers in Tagger
- Change HV crate in tagger that is causing issues.
- Accelerator maintenance day Thursday
- RF recovery Tuesday and machine tuning for Hall C high current.
- Commissioning steps temporarily postponed:
- Flux optimization/Act .Col. calibration
- PS and TAGH HV scans
- Bleed-through test: measure bleed-through with A slit as usual and A slit completely closed to see whether using B slit would help.
Sunday June 19
- Last 24h:
- TOF trigger included in data stream. Total rate 60kHz, 400 Mpbs, ~97% live time. CTOF prescale factor 5
- Beam profiler was inserted to study position with redundant monitors. Beam position is unstable
- Smooth running overnight. Coherent peak shape and energy looks good.
- Reports
- From PD-RC 8:45 meeting.
- Jay will look into our beam stability issues.
- Trigger timing
- New diamond spot analysis tool available
- From PD-RC 8:45 meeting.
- Issues
- Beam position is unstable
- DAQ live time dropped twice. [5][6]
- 24 tagger channels off.
- Plans
- Flux optimization/Act .Col. calibration
- RF recovery Tuesday
- Accelerator maintenance day Thursday
- Commissioning steps temporarily postponed:
- PS and TAGH HV scans
- Bleed-through test: measure bleed-through with A slit as usual and A slit completely closed to see whether using B slit would help.
Saturday June 18
- Last 24h:
- Live time now being written to epics archiver.
- Downstream beam pipe was moved. Opportunistic.
- Tagger NMR lost lock
- Sasha addeed TOF to triggerRates were very high. Pre-scale by 2 and thresholds raised but timing not complete yet.
- Hovanes attempted AC scan but beam was not locking
- Ran quasi production for NPP and maybe CPP.
- Reports
- From PD-RC 8:45 meeting.
- Generally everyone is somewhat unhappy. :-(
- CPP dEdx issues. CDC is likely fine. Its gain and hit efficiency (hits found/hits measured) are normal. But tracking is missing the start counter, & the target isn't in the usual spot.
- From PD-RC 8:45 meeting.
- Issues
- 24 tagger channels off.
- Plans
- Flux optimization/Act .Col. calibration
- Trigger development for TOF trigger
- RF recovery Tuesday
- Accelerator maintenance day Thursday
- Commissioning steps temporarily postponed:
- PS and TAGH HV scans
- Bleed-through test: measure bleed-through with A slit as usual and A slit completely closed to see whether using B slit would help.
Friday June 17
- Last 24h:
- Tagger voltage alarms
- Nick changed card and slot again. Same issue. He set the max voltage to 1100 V so an overvoltage is less serious. The next step is to change the crate which would take a shift and need 2 people.
- Hovanes turned counters off
- Beam returned at 11 pm.
- Harp scans performed [7][8][9]
- Beam envelope looks good Accelerator have asked us to put these projections in the elog in future.
- No CH edge observed. Hovanes helped to get diamond aligned overnight. [10]
- Ran quasi production for NPP. Pressure change CDC alarm twice.
- Tagger voltage alarms
- Reports
- From PD-RC 7:45 meeting.
- Hall C not getting high current, more work is needed
- Hall B will need a spin dance
- Low rates in TOF [11] and low current in CDC [12]
- Spreadsheet with list of runs
- From PD-RC 7:45 meeting.
- Issues
- 24 tagger channels off
- Plans
- Flux optimization/Act .Col. calibration
- Trigger development for TOF trigger
- RF recovery Tuesday
- Accelerator maintenance day Thursday
- Commissioning steps temporarily postponed:
- PS and TAGH HV scans
- Bleed-through test: measure bleed-through with A slit as usual and A slit completely closed to see whether using B slit would help.
Thursday June 16
- Last 24h:
- No beam since last meeting
- Still getting tagger voltage alarms (should we just turn those counters off?)
- Reports
- From PD-RC 7:45 meeting.
- Beam will be gone until Swing Shift at least
- Spreadsheet with list of runs
- From PD-RC 7:45 meeting.
- Issues
- High trigger rate in CTOF
- MWPC #6 window cover removed. If successful, great. Otherwise, attempt to move helium bag downstream.
- High trigger rate in CTOF
- Plans:
- Upcoming Items:
- PS and TAGH HV scans
- Bleed-through test: measure bleed-through with A slit as usual and A slit completely closed to see whether using B slit would help.
- Tagger Access:
- Change HV crate (Nick, Chris)
- Install helicity fibers and connect to DAQ