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User name Fatiha
Log entry time 16:03:13 on December21,2008
Entry number 254298
keyword=Shift Summary
Shift crew: F. Benmokhtar, M. Osipenko and P. Bradshaw
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- 8:00... Started shift without beam.
- 8:15... MCC says the technicien is on his way,
No time estimate.
- 8:25... Problem solved, MCC is asking if we want
the beam. We of course accpeted. No time
to page Ramesh, we are following the beam
recovery procedure: from empty target to
target to Beo, run with 2 uA. chek bpms, etc...
- 8:40 MCC took beam, one of their magnet tripped.
- 9:05 Back to production running.
- So many beam trips: 19 trips in one hour.
- HAPPEX DAQ crashed twice during the shift: roc26,
then roc23 faults.
- 3:50 MCC called, they think that the trips are half of the time
do at the level of the ep ion chamber. They moved it upstream with 0.5mm, and will see if this helps. The bmp A and B positions didn't change and will not change during this process.
- 4:55 Beam is stable for the last 20 minutes, MCC called, everyone
in Happy! But no one knows how it is fixed.
Run list:
---------
4656... BeO target, bpm positons and spot++ check.
Prodution on 3He target:
------------------------
HAPPEX run:
Run Charge
4658 ... 0.04209
4659 ... 0.03113
4660 ... 0.04204
4661 ... 0.04185
4662 ... 0.04199
4663 ... 0.04164
4664 ... Goes to next shift
Total... 0.24074 C