DIRC Operations Weekly Report
Period: Saturday 2006/07/01 - Friday 2006/07/07
Oncall: Jerome Bequilleux
Fast Monitoring: Rolf Andreassen, Jerome Bequilleux
File location: $BFROOT/www/Detector/DIRC/WeeklyReports/report_20060708.html
Plot directory: $BFROOT/www/Detector/DIRC/WeeklyReports/Plots/report_20060708
PEP peak lumi: ~11*1033
(previous week: 10.2*1033)
BaBar integrated lumi: 4.483 fb-1
(previous week: 3.98 fb-1)
Run 5b PEP delivery: 62.49 fb-1
Run 5 total delivery: 129.50 fb-1 Run 5 total BaBar recorded: 124.86 fb-1 including 9.82 fb-1 off-peak data
PEP activities this week:
Saturday 1st/Sunday 2nd: Abort kicker timing and vacuum
problem(pump) both fixed. They had a single fill for 22 hours. However
fill difficulties started on Sunday.
Wednesday 5th : -NFTR problem
-lumi ratio set to 0.98;
-UPS work is done and the battery is ok
Thursday 6th :PEP is trying to diagnose the HER aborts.
PEP activities planned next week :
try to find the origin of the HER aborts that occurs arround 1200mA.
Foreseen work opportunities (PEP down periods):
BaBar activities/issues this week:
logbook for details
-July 5th:Jerry disabled the SOB dump valve as there
was maintenance work on the UPS system.
-July 4th: received 3 automatic emails from IR2 to warn that
the degasing pump was off: 3 very close glitches in
the readeout of the degasing pump variables. Nicolas added a new
protection to prevent us from new future single glich alarms (See: single glitch
-July 7th: New alarm "degasing pump off", but not single glitches. Went to
IR2 to see the hardware: everything was fine. Obviously, we have a
readout problem; Nicolas changed the red alarm threshold from 15 to
60, so that we won't have the alarm again, for these conditions.
-July 5th: the run taking while the board #3 of sector 4 (crate in slot 3)
was off have been DQG-ed OK by Eli and by the PID expert (30 Jun06) ->next time, the faulty board
wouldn't need to be replaced immediately. Information
added in the ops. manual.
-July 7th: Nicolas
added long term instruction about the green alarms
DRC:HV:UNDERVOLTAGE, OVERVOLTAGE, TRIP.
Worrying unexplained issue:
-July 6th: During DAY shift, around 11:15am, ROMs
crashes. In fact, all 12 DIRC front-end crates went off at the same time for about 20 seconds, creating the ROMs crash (reason
We don't see very well the front-end crates fans
having a speed going to 0 because of the switch off of front-end
crates the day before-> due to the scale of plots(see Fans
Monitoring Plots ); will be changed.
Investigating the need of changing hv crate in slot #3:
We talked with Paul Stiles about the 3 failing boards we gave him
coming from crate in slot #3. No apparent reasons to blame the crate
-> we'll probably keep it untill the shutdown, unless new problems
appear with it.
Downtime due to the DIRC: 0 minutes.
Background summary plot
- Matt out of town till July 12th
- Emmanuele is unavalable till July 18th