AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
BRIKEN
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Entry time:
Mon Mar 31 13:14:19 2025
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> > 18/10/16 START: 16:56 > 18/10/17 STOP: 9:51 > > ROOT file: 181017_0951_BkgOverNight.root > > Comment: > Tube 121 is noisier than the others (see fig). > > Issue: > all the channels connected to PA3 and PA4 > have twice the number of counts than the remaining channels (!?). > Actually the pulser counts. > > Solution: > This channels are from UPC tubes and are connected to pulser PB-5. > We found that the threshold of external trigger was set to 1V > instead to 1.8V as before and this was producing a double pulse (see photo) > like triggering on the fall and rise of the trigger pulse. > This happen whenever the threshold as below 1.6V. > We do not understand this: the signal has +2.2V and no apparent ripple (!????). > We set threshold to 1.8V and now is OK
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