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User name LeRose
Log entry time 16:00:50 on June18,2001
Entry number 63695
keyword=Shift Summary
08:00 shift starts
runs 1639/20639 in progress (HV problems and VDC discriminator problems solved by the previous shift)
12:27 beam trips start to increase dramaticaly
12:39 MCC says they're taking beam to investigate the problem (estimate 15 minutes)
12:57 MCC (Mike Spata) says they have found the problem (something to do with control of vertical steering, power supply not regulating at 3E-03 level, should be much much better) Cannot run until it's fixed. No estimate at this time on how long it will take.
13:30 MCC says we will be down until at least 15:00.
Requested Access for target coil work. (Adding turns to the transverse coil)
At shift end work continues on the target coil and there is no word from MCC re when the beam will be back.
Experimental conditions:
Left arm: po=1.455 45.007 deg
Right arm: p0=1.455 45.000 deg
Beam half wave plate is IN
Target half wave plate is IN
Target polarization 180 deg
run/run...........start/stop........
1639/20639....7:57/9:02........Target polarization in start run file is incorrect (should be 180 see: halog 63663)
1640/20640....9:05/10:00
1641/20641...10:58/12:01
1642/20642...12:03/12:38......ended due to lack of beam