Started after beam current was reduced by a factor of 2
plunger run # 116
Earlier: CUP#6 100 enA
Now: CUP#6 50eNA
Beam dump 1.8 enA
Collimator 0.8 enA
The operator is asked to keep the beam dump current not larger than the present value.
Supposed Distance = 10 um
position of the target = 10 um
micrometer = 11.7 um
Voltage = 7.9 V
Plunger off set 60 um
Which means we are running 60 um + 10 um (read from position window of plunger) = 70 um.
Observed that detectors at theta 143 degrees count most. Is this because they see beam dump? |