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PSI System Controls and Diagnostics
High proportion of rejected
pulses.
D100 User Manual
Excessive photomultiplier
temperature variation.
Pile up time too long.
Photomultiplier gain
suppression by high rate.
D100_UM_081027
suitable probe. Try another
supply.
Monitor temperature with
D100 probe.
Loss reduced if gain
increased.
Page 41 of 46
Insulate or isolate the
photomultiplier.
Reduce pile up time,
consistent with sufficient
energy resolution.
Run at higher multiplier gain.
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