Revision as of 09:25, 2 October 2021

Saturday, October 1, 10:00 am

In last 24 hours:
Issues:
- Bleedthrough .. more likely get worse when Hall A comes on line on Wed.
Plan:
- After 50 nA production, we will turn off chamber HVs, and move on to 100/200 nA runs.
- 100 nA CDC & FDC turn off (2 shifts)
- 200 nA CDC & FDC turn off (8.4 shifts)
- Remove Be target to take empty target (will take 8h. on Monday?)
- For shift workers: FCAL scaler should be checked frequently.

In last 24 hours:
- Beam came back around 17:40. After 2h long downtime and DAQ trouble, production runs started at 2:42 am.
  - Radiation Level: OK
  - Harp scan: OK
- Early Riser summary
- Owl summary
- Swing summary
- Day summary
- Main trigger normalized rate is 25% lower with CDC/FDC turned on (Alexandre)
Issues:
- FCAL Trigger issue (Sasha)
- FCAL FADC scalers disconnected
- Bleedthrough
Plan:
- 50 nA with CDC & FDC turn on (2 shifts), Lubomir must be around
- 100 nA CDC & FDC turn off (2 shifts)
- 200 nA CDC & FDC turn off (8.4 shifts)
- Remove Be target to take empty target (will take 8h. on Monday?)
- For shift workers: FCAL scaler should be checked frequently.

In last 24 hours:
- Machine maintenance ended around 21:20, but we don't have a beam as of 8:30 (injector non-colinearity, 5E03 BLM trips, ...).
- Early Riser summary
- Owl summary
- Swing summary
- Day summary
- During downtime for maintenance:
  - BCAL pedestal calibration (Sergey)
  - FCAL base replacement Communication issue resolved(Rebecca/Mark/Malte)
  - FCAL HV scan (Igal)
- Timing calibration update (Sean)
- Beni started Special Run 81291 for SC dark rate at 8:30 remotely. (will take ~0.5h)
Issues:
- Strange behavior in FCAL base (Rebecca/Mark/Malte)
- 5 FCAL bases don't reach 1800V (Mark/Malte)
- Bleedthrough
Plan:
- Before taking data: check radiation level and beam quality (HARP scan)
- 50 nA with CDC & FDC turn on (2 shifts), Lubomir must be around
- 100 nA CDC & FDC turn off (2 shifts)
- 200 nA CDC & FDC turn off (8.4 shifts)
- Remove Be target to take empty target (will take 8h. on Monday?)

@@ Line 7: / Line 7: @@
 #* [https://logbooks.jlab.org/entry/3915892 Day summary]
 #Issues:
-#* Bleedthrough
+#* Bleedthrough .. more likely get worse when Hall A comes on line on Wed.
 #[https://halldweb.jlab.org/primexd/run_plan/Run_Plan_Fall_2021.pdf Plan:]
-#* 50 nA with CDC & FDC turn on (2 shifts), Lubomir must be around
+#* After 50 nA production, we will turn off chamber HVs, and move on to 100/200 nA runs.
 #* 100 nA CDC & FDC turn off (2 shifts)
 #* 200 nA CDC & FDC turn off (8.4 shifts)