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 13:09:16 2025
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> We investigate the effect on the noise in ORNL tubes of using a differential PA. > > We connect the tubes in current PA10 (126-140) to one of the new diff PA > and connect the output to converter card #4 which is connected to ADC3 (and ADC4). > > First a short run with 252Cf for setting the right parameters and the calibration > file: 161007_1743_252Cf_ORNL_diffPreamp.root > > Then we make a background run > file: 161007_1743_bck_ORNL_diffPreamp.root > > As can be seen in the figure the effect of the differential preamp is to > compress the noise down to 100keV, becoming more similar to > the situation of the RIKEN tubes. > > Thus it will be beneficial to use Diff PA. However as we can only setup one > because we have only one spare Diff-Unip converter card, we decided not to > use it as the impact will be very low and implies a lot of changes. > However one must remember that since we are always going to require coincidence > with betas during the measurement this noise should have no effet.
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