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User name R. Michaels
Log entry time 03:02:03 on November22,2005
Entry number 161006
Followups:
keyword=rate calibration run 3137
Rate calibration at 4 uA where the BCMs work.
During run 3137 we put HAPPEX detector into datastream.
Put HV to 2100 V.
At event 20K we ask for beam
At event 26K we have 4 uA.
At event 48K we turn off beam.
Here are some rates from scaler analysis at the full current.
hac_bcm_average = 3.97 uA
T1 = 779 kHz .... R-arm S0
T2 = 1.210 MHz .. R-arm Happex det
T3 = 1.46 MHz ... L-arm S0
T4 = 2.07 MHz ... L-arm Happex det
Individual detector segments
L-arm det1 = 42.8 kHz
L-arm det2 = 2.22 MHz
R-arm det3 = 72 kHz
R-arm det4 = 1.22 MHz
These should be adequate to tie into the 0.1 uA running
and calibrate that low current result. But I'll do it later.