Main INDEX
Monthly INDEX
PREV
NEXT
User name Ole Hansen
Log entry time 22:14:45 on May27,2008
Entry number 239972
keyword=Trigger 7 gone wild
Over the course of the shift, we've noticed a large peak near zero in the BB ADC sum histogram. The peak has been growing steadily and is now making up more than 1/3 of the entries. Closer inspection shows that all these events are trigger 7 - which should not trigger at all. Oddly, the trigger 7 scaler does not count anything. We observe that trigger 7 even counts with no beam present - about 900 Hz currently. Bob will come in to investigate. Could be a bad cable.