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User name N Toro
Log entry time 23:54:48 on July 4,2010
Entry number 330105
keyword=Shift summary (swing)
Shift summary, July 4 swing
SL: Natalia Toro/Philip Schuster (trading off)
TO: David Anez
3rd: Jason Bono
Beam up at about 20:30
Scanned BPM x and y positions between +/- 6 with 5uA pulse beam on BeO, monitoring scaler rates. Rates rise from few kHz on target to about 20 kHz on frame.
Our previous runs at A=(0,0) and B=(0,0) seem to have been well-centered
Runs 1695, 1696: looking at scaler rates at 1uA, with 10x5 MCC raster, T1 and T5 seem consistent with rates in run 1347
Increased raster to 12x8 MCC
Run 1698: coincidence data at about 1 uA.
Run 1701: coincidence data at about 2 uA.
22:10 request escorted access
22:39 requested beam permit
Bogdan has added a 100 ns delay to the T1 signal -- should remove coincidence peak.
Started run 1702 with 1uA beam, to verify absence of coincidence peaks
(500K events, T6 plus prescaled T1,3,4)
Run 1703. 1704: same, but at 3uA (500K evts)
13:02 HV on HRS-R have been changed
Run 1705: 0.5 uA checkout run for HRS-R, T3 only, 500K
1706, 1707, 1708, 1709: 100K evts each with slightly different HRS-R high voltages
approx. 23:40 -- controlled access (reset Q1, Bogdan is removing delay from coincidence trigger)
23:50 Q1 back up