Run Planning Meeting Notes, November 30 - December 7, 2022
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Hall D counting room white board
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Contents
Monday Dec. 5th
Last 72h
- Friday, *** and *** were spent mostly with production on full target. *** of ABU (Sat.7am - Monday 7am).
- Hall C re-started running Friday around 8pm. Now Hall A, C and D are running concurrently.
Reports
- Friday:~1h Hall Rapid Access between 11am and 12:10pm to change a dying FCal basis (Malte/Mark Dalton) and check the possibly faulty FDC fADC that had been installed Wednesday. It was eventually not swapped (Lubomir). Also, RadCon surveyed some modules that needed to be taken out of the Hall.
- Friday 18:20: Harp scans (first ones since 11 days). Beam profiles looks good. (Hovanes)
Issues
- FDC timing shift
- Beam locks sometime do not work and the beam transmission drops. (Plot for Saturday,~6am. It also happened Friday around 11:50pm) MCC explains that when Hall C is off or ramping up. (I also saw this instance Friday at 1pm when Hall A was ramping up, although at the time, I wondered if it was just a coincidence). => Watch carefully the beam position.
Short term run plan
- If beam is off, we have opportunistic work:
- Beam off for more than 1h: rapid access for A. Somov, Vlad and Harshak for oportunistic work in the PS test area.
Tentative longer term run plan
- Possible RF recovery Wednesday Dec. 7th.
- TAC run?
- Luminosity study?
Friday Dec. 2nd
Last 24h
- Thursday was spent mostly with production on full target. It was an efficient day, with 17.8h of ABU (7am-7am).
- A. Somov did a low beam current test of the Active Colim. high gain in anticipation of a future TAC run. It looks good.
- Hall C was supposed to get back to running in mid-swing shift, which would be followed by us doing Harp scans (last ones done: Oct. 21st), but it did not happen (Hall C vacuum issue).
Reports
Issues
- The FDC fadc installed Wednesday by Naomi and Lubomir needed baseline calibration. Done during swing shift (Sergei/Lubomir).
- cdc p_diff alarms are becoming rarer: 1 (day shift) + 1 (swing shift) + 0 reported in owl shift + 1 early riser.
Short term run plan
- Hall C is expected to be back to running ??at some point??.
- Harp scan after Hall C beam is tuned (last harps done on Nov. 21st, but Transmission is fine.)
- FDC fadc: 20 min raw mode run with beam. Beni will analyse it and determine if the fadc needs to be replaced
- If beam is off, we have opportunistic work:
- Beam off for more than 1h: rapid access for A. Somov and Vlad for ??
- Beam off for more than 2h: rapid access for Lubomir or Beni IF FDC fadc needs to be changed
- Beam off for more than 2h and RadCon is available, need to survey fadc to removed them from the Hall (Lubomir/Codi)
Tentative longer term run plan
- Possible RF recovery Wednesday Dec. 7th.
- TAC run
- Luminosity study
Thursday Dec. 1st
Last 24h
- Wednesday started with production on empty target. It was an efficient day, with 17.1h of ABU (7am-7am).
- 9:10am-11:30 Rapid access to change fadc for FCal and FDC, and fill the target.
- Filled the target, from 10am-1pm. It took 3h to reach nominal density, and the first production runs are done while it was still filling. Target status indicated that it was full&ready by 11:30am.
- Hall A re-started running at 17:48. A consequence is that the Hall D beam energy was quite instable from 6pm (Wed.) to 1am (Thursd.), with total drift of about 14 MeV.
Reports
- PrimEx Analysis progress (Drew)
Issues
- The new FDC fadc is worst than the one replaced (Naomi/Lubomir). The problem is only for raw mode run.
- Many cdc p_diff alarms (e.g. 0.8 alarm/hour during swing and owl shifts) leading to runs often shorter than 2h (this has already been discussed several time. This is just a report).
Run plan
- Hall C is expected to be back to running during swing shift today.
- 20 min test at low beam current/high Active Colim. gain to see if adjustment are needed (A. Somov)?
- Last harp scan was done on Nov. 21st. Should we do a new one? (Transmission is fine.)
- Luminosity study?