Difference between revisions of "Run Planning Meeting Notes, January 19 - January 25, 2023"
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*[https://logbooks.jlab.org/entry/4113408 Tim W. reminder on acknowledging alarms] | *[https://logbooks.jlab.org/entry/4113408 Tim W. reminder on acknowledging alarms] | ||
* [https://logbooks.jlab.org/entry/4113027 HVB currents look high] and [https://logbooks.jlab.org/entry/4113590 follow-up] (Naomi) | * [https://logbooks.jlab.org/entry/4113027 HVB currents look high] and [https://logbooks.jlab.org/entry/4113590 follow-up] (Naomi) | ||
| − | * 30% increase in | + | * 30% increase in rates compared to Summer 2020 run period. |
**[https://logbooks.jlab.org/entry/4111933 Original finding by A. Somov] | **[https://logbooks.jlab.org/entry/4111933 Original finding by A. Somov] | ||
**[https://logbooks.jlab.org/entry/4113029 Comparison of 2020 and 2023 for TAGH rates (A. Deur)] | **[https://logbooks.jlab.org/entry/4113029 Comparison of 2020 and 2023 for TAGH rates (A. Deur)] | ||
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**[https://logbooks.jlab.org/entry/4113098 rho and pi0 yields (A. Austregesilo)] | **[https://logbooks.jlab.org/entry/4113098 rho and pi0 yields (A. Austregesilo)] | ||
**[https://logbooks.jlab.org/entry/4113253 BCM/FCup calibration suggested by the PD], [https://logbooks.jlab.org/entry/4113276 its results] and [https://logbooks.jlab.org/entry/4113408 follow-up]. | **[https://logbooks.jlab.org/entry/4113253 BCM/FCup calibration suggested by the PD], [https://logbooks.jlab.org/entry/4113276 its results] and [https://logbooks.jlab.org/entry/4113408 follow-up]. | ||
| + | **[https://logbooks.jlab.org/entry/4113656 the rate discrepancy after BCM/FCup calibration has been reduced by half (A. Deur)] | ||
**[https://logbooks.jlab.org/entry/4113580 Ran overnight on different amo radiators] | **[https://logbooks.jlab.org/entry/4113580 Ran overnight on different amo radiators] | ||
Revision as of 08:41, 20 January 2023
Contents
Friday January 20
Past 24 hours
- Ran on amorphous radiator (250 nA) until 10am. Then, beam was taken away for RF work (high current push for Halls A and C) and [repairs]. Beam came back around 5:30pm. We did harp scans, a BCM/FCup calibration, and then ran on various amorphous radiators during the night and early morning. ABU= 11.5h for the day
- Several accesses done during the day:
- Sasha (FADC replacement for TOF)
- Sergey
Shift Reports
Reports
- Harp scans. Sigma_y is too wide=> too wide photon beam spot (magenta). Okay for now (unpolarized beam)?
- TOF calibration (Beni), FADC replacement for TOF (A. Somov)
- Difference in Shape of Reconstructed photon beam energy with different AMO radiators (Churamani Paudel)
Issues
- Beam energy oscillation investigation (M. Tiefenback). Summary: Mike T. suspects the oscilations are not real but he is asking confirmation/advice from the system experts.
- Tim W. reminder on acknowledging alarms
- HVB currents look high and follow-up (Naomi)
- 30% increase in rates compared to Summer 2020 run period.
- Original finding by A. Somov
- Comparison of 2020 and 2023 for TAGH rates (A. Deur)
- Check that TAGH counters scale with (A. Deur)
- rho and pi0 yields (A. Austregesilo)
- BCM/FCup calibration suggested by the PD, its results and follow-up.
- the rate discrepancy after BCM/FCup calibration has been reduced by half (A. Deur)
- Ran overnight on different amo radiators
Plans
- Thursday evening and Friday night:
- Once beam come back, do Harp scans.
- FCup test of our beam dump BCM.
- Run 1h on the amo radiator of the goni (baseline for next runs below). 250 nA
- Run 2h on 0.19E-4 RL amo radiator on radiator ladder (250 nA).
- Run 2h on 1.12E-4 RL amo radiator on radiator ladder (250 nA).
- Run (until the beam is taken away in the morning) on 3.4E-4 RL amo radiator on radiator ladder (250 nA).
- Beam off starting Friday morning around 7:30am to fix vacuum issue in south linac, until 4pm(?).
- Hall access:
- Sergey F.
- Diamond alignment: ?
- Until then production on amorphous.
- Link to runplan
Thursday January 19
Past 24 hours
- Ran on empty target until 7:20am. Then, beam was taken away for beam and RF study and acceptable beam came back only Thursday at 1:10am. ABU= 4h for the day
- refilled the target around 4:15pm.
- Several accesses done during the day:
- Scott
- Sergey
- David Lawrence
- Cody
- Took amorphous data, starting around 1:10am after aborted attempt to check diamond alignment.
Shift Reports
Reports
- Harp scans (just our harp)
- Hovanes attempted to start diamond alignment between 10:50pm-1am. Not able to start due to lack of good beam.
Issues
- TOF rate issues (Beni)
- beam energy oscillation
- 30% increase in transmission compared to Summer 2020 run.
Plans
- Beam off starting around 10am for RF study, nominally until 4pm+/-4h.
- Hall in controlled access?
- Diamond alignment: Friday day ? (Hovanes unavailable today)
- Until Friday day, production on amorphous?
- Link to runplan
