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User name Pitt
Log entry time 17:08:59 on January 7,2011
Entry number 212896
keyword=Adjust beam current for ~ 6 uA leakage in Region 2 chambers
After bringing on all Region 2 chambers to F=C=2300 V, I had MCC adjust the beam current upwards to get ~ 6 uA at most leakage in the chambers. Thye changed the chopper slit from 10.6 to 10.8 to achieve this. The region 2 scintillators went from about 40 kHz to 80 kHz.
Attached is a snapshot of the rates for both region 2 scintillators and Hokie Fast ORS.
FIGURE 1
FIGURE 2
