User name Ole Hansen
Log entry time 07:55:49 on June 5,2002
Entry number 85273
keyword=Owl Shift Summary
0:00 Beam is off. MCC investigating why they cannot deliver stable 100uA to us. Problem is with injector.
0:36 Beam returns. 100uA. Start run 1172. Sieve in Left, no collimator in Right.
1:00 MCC reduces current to 80uA to stabilize beam delivery and to investigate injector problems. Many trips, quite inefficient data taking.
1:10 Beam goes away for more injector work.
1:25 Beam returns, 80uA, a bit better than before. Still many trips.
1:50 Trip frequency increasing. MCC lowers current, still doesn't seem to help much.
2:08 Beam gone again. MCC investigates why it is so terrible.
2:27 Beam comes back, 80uA. More stable now.
2:52 Beam deteriorates again.
3:00 Stop data taking. Move in 15cm LH2 target.
3:02 Target in place. Asking for beam.
3:20 Asking for 50uA instead of 80uA in hopes of more stable beam.
3:55 Changing left arm collimator from sieve to open.
4:02 Collimator in place. Asking for 15uA.
4:08 Start data taking, LH2 15cm, collimators on both arms open.
4:23 Moving in 6msr collimator on left arm.
4:28 Start data taking
4:32 End run. MCC reports that North Linac dropped to Restricted Access, and many magnets have tripped. No beam for a while.
6:30 MCC says "at least another 2 hours until beam". Oh well.