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User name Meziani
Log entry time 00:02:29 on February19,2011
Entry number 347546
Start of shift
SL: Meziani, TO:Chao Gu, 3rd: B. Norum
4:00 pm Moller measurement underway
4:50 pm Beam charge asymmetry test
6:05 pm Moller measurement completed
7:00 MCC is sending CW into the Hall.
8:20 Beam in the Hall at 5 uA in nominal position and raster size.
Taking a run to check raster size: run 1528 on empty target
8:40 pm Move target to BeO and check raster size
8:47 pm Moving target to LD2 4cm (deuterium)
Rates checked and OK for 20uA.
9:00 pm MCC needs 15 minutes for ion chamber calibration.
9:30 ion Chambers calibration completed.
Start taking data
run # 1531 20 uA
Noticed quench of Q2 right arm around 10:00 pm
Learned that the Quench happened in the previous shift before the Moller measurement. No one seems to have noticed and no information was passed on. The alarm handler was turn off too.
run# 1531 was taken with Q2 down and Q3 with the wrong value of current 1176A
10:20 Accessing the Hall to reset Q2 right arm.
11:10 All set to take data at 20 uA.
run # 1533 171K
run # 1534 600K
run # 1535
12:00 pm shift Ends during run 1535