Difference between revisions of "Run Planning Meeting Notes, Sep 28-Oct 3, 2018"

Revision as of 13:22, 30 September 2018

Notes from the previous 72 hours:
- Friday day + swing shifts MCC tuned Hall D beamline, improved convergence & reduced spot size
- Friday late swing Hovanes aligned the diamond for 45/135
- Saturday owl Collected 600M triggers of production data before one of the machine quads tripped at 5am. 3h down while it was replaced.
- Saturday day Beam returned long enough for Richard to collect data for TagM thresholds; then a RF module died & was replaced. Beam restored at ~ 1pm. Richard set TagM thresholds. Amo run.
- Saturday swing Collected 400M triggers para (0), 5M long mode para, 64M perp (90). 2h without beam as MCC found an issue with the ion chamber calibration, then another 2h for HC BLM trips.
  - Sasha says the PS coinc rate has gone from 3.5 kHz last spring with the thicker diamond to 5.4 kHz at 530nA. Overall trigger rate is now 60 kHz & the DAQ livetime is 96%. So our luminosity is ~ 1.5 x the spring rate.
- Sunday owl No beam - injector problems
- Sunday day MCC say the beam is not physics quality (energy spread is too wide), will work on this with the hope of restoring beam towards the end of the day shift, in fact it returns at around noon.
CEBAF:
Action Items:
Issues:
Reports:
- Monitoring
Run Plan: Run plan
- Coordinate with C for TAC run - on or after Wed (otherwise need access) - plan to install Pb converter on Tuesday & then calibrate A.C. high gain setting
- Acc whiteboard
- Counting house whiteboard
AOB

Notes from the previous 24 hours:
- Beam position erratic throughout the day & first half of swing day swing
- Energy drift pathlength corrected
- Sergey completed first set of DAQ tests
- Stabilized mid-swing enough to attempt alignment but spot is huge 1.2 x 1.5mm
- Aligned 0/90, still need to do 45/135
- Collected 'production' data overnight, concerned about quality cobrems gui
- Whiteboard camera improved
- BOR records are back
CEBAF:
- Expect 2h downtime from 9am for HA to go to 2 pass; MCC will work on our optics during that time
Action Items:
- Update reference plots (CDC's new ref colz scale is off)
Issues:
- Beam
- Network problems
- Rootspy is often unable to find histos & make log entry, loses processes, need to start & stop monitoring w hdmongui.
  - Try start first. Open out the gui and count the # respawned processes, send info to David.
- Plot browser fix in progress
Reports:
- Monitoring Run 50698 (para)
Run Plan: Run plan
- Beam off at 9 for pass change
- Sasha PS (Sat, 1h) and Richard TAGM threshold not done yet
- Coordinate with C for TAC run - on or after Wed (otherwise need access), plan to install converter on Tuesday
- Acc whiteboard
- Counting house whiteboard
AOB

@@ Line 16: / Line 16: @@
 #**[https://logbooks.jlab.org/entry/3600922 Sasha says the PS coinc rate has gone from 3.5 kHz last spring with the thicker diamond to 5.4 kHz at 530nA. Overall trigger rate is now 60 kHz & the DAQ livetime is 96%.  So our luminosity is ~ 1.5 x the spring rate.]
 #*Sunday owl [https://logbooks.jlab.org/entry/3601137 No beam - injector problems]
-#*Sunday day MCC say the beam is not physics quality (energy spread is too wide), will work on this with the hope of restoring beam towards the end of the day shift, they are aiming to get 40uA to Hall C (not the desired 65uA), hope for all halls to run through swing & owl & maybe work on injector/beamline again on Monday.
+#*Sunday day MCC say the beam is not physics quality (energy spread is too wide), will work on this with the hope of restoring beam towards the end of the day shift, in fact it returns at around noon.
 #CEBAF:
 #Action Items: