Difference between revisions of "Run Planning Meeting Notes, January 19 - January 25, 2023"
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= Friday January 20 = | = Friday January 20 = | ||
=== Past 24 hours === | === Past 24 hours === | ||
− | * Ran on amorphous radiator (250 nA) until 10am. Then, beam was taken away for [https://logbooks.jlab.org/entry/4113138 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 [https://logbooks.jlab.org/entry/4113378 ran on various amorphous radiators during the night] and [https://logbooks.jlab.org/entry/4113552 early morning]. ABU= | + | * Ran on amorphous radiator (250 nA) until 10am. Then, beam was taken away for [https://logbooks.jlab.org/entry/4113138 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 [https://logbooks.jlab.org/entry/4113378 ran on various amorphous radiators during the night] and [https://logbooks.jlab.org/entry/4113552 early morning]. ABU= 11.5h for the day |
* Several accesses done during the day: | * Several accesses done during the day: | ||
** Sasha (FADC replacement for TOF) | ** Sasha (FADC replacement for TOF) | ||
Line 20: | Line 20: | ||
* [https://logbooks.jlab.org/entry/4113047 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. | * [https://logbooks.jlab.org/entry/4113047 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. | ||
*[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) | ||
* 30% increase in transmission compared to Summer 2020 run. | * 30% increase in transmission compared to Summer 2020 run. | ||
**[https://logbooks.jlab.org/entry/4111933 Original finding by A. Somov] | **[https://logbooks.jlab.org/entry/4111933 Original finding by A. Somov] |
Revision as of 08:21, 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 transmission compared to Summer 2020 run.
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