DIRC Operations Weekly Report
Period: Saturday 2006/07/15 - Friday 2006/07/21
Oncall: Jerome Bequilleux
Fast Monitoring: Bradley Wogsland, Jerome Bequilleux
File location: $BFROOT/www/Detector/DIRC/WeeklyReports/report_20060715.html
Plot directory: $BFROOT/www/Detector/DIRC/WeeklyReports/Plots/report_20060715 (empty)
PEP peak lumi: 11.2*1033
(previous week: 10.2*1033)
BaBar integrated lumi: 3.13 fb-1
(previous week: 3.98 fb-1)
Run 5b PEP delivery: 62.49 fb-1
Run 5 total delivery: 132.63 fb-1 Run 5 total BaBar recorded: 127.93 fb-1 including 9.82 fb-1 off-peak data
PEP activities this week:
All the week, PEPII tried to find the reason of HER aborts
(appeared in April but became significant in the middle of May).
-tried to change the bunch pattern (keep aborts at
1200mA; vacuum activity) -> back to normal bunch pattern
-tried to raise HER current with increasing SVT
RAD threshold (BABAR ramped down).
-change of vacuum cooling system
-studied correlations between belows' temperature
Thursday 13th: Leak of compressed air outside the gas shack
Friday 14th: UPS alarms -> an expert will come to have a look
and hopelly fix the problem.
PEP activities planned next week :
Foreseen work opportunities (PEP down periods):
BaBar activities/issues this week:
logbook for details
Degasing pump (following)
Jerry checked the situation with the
degassing pump (we had glitches 5 times over the week-end). We will
continue like that, knowing that the 52V
readouts for the degassing pump in ambient is not a hardware problem
of the degassing pump. As we keep a lower alarm for this variable, we will
still know if the degassing pump is having troubles.
talking with Philippe(Grenier) about the DIRC
analogic chips, for data acquisition, we found out that corresponding
thresholds need to be set when changing a DFB. Apparently, no
documentation exists about it...
- Friday 14th: -Matt moved the degasing pump back to the
UPS system (was put on normal power when there were problems on the
UPS) at 8am. Maybe it will partially fix the glitches problem with the
readout of the degassing pump variable. However, as ths UPS is having
trouble again, and will need some work tomorrow, Matts switch back to
normal power at 3 pm.
Fan Monitoring (following):
- Friday 14th:
Nicolas changed daily fan monitoring plots. We keep the usual scale, but there will be arrows for values that go above or under this scale (see Fans
Monitoring Plots ).
Background summary plot
- Emmanuele is unavalable till July 18th