AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Entry time:
Sat Mar 29 12:26:46 2025
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> 11.10 DAQ found stopped. No storage mode so can't tell when, but presumably at 06.30 during LN2 fill cycle. > Unable to regain control of (see errors after merger restart in attachment 1) system so power cycling FEEs. > > 11.15 Bias voltages @ ambient temp 25.5oC before DSSD noise investigation (attachment 2+3). > > 11.40 NB+DK attempting shielding of LN2 solenoid. > Manual fill initiated. DAQ still stopped at 11.41. > Unable to regain control of system. Power cycle FEEs while DK+NB install more shielding. > > 2:55 Made attempts to solve the noise issue that was plaguing DSSD1. > Attempts at checking the cabling, making sure the detectors were light sealed and switching the bias cables > around were unsuccessful. > A blue cable was found to be laying across the snout of AIDA that runs as a temperature probe for one of the > clover detectors. > Moving this cable appears to have solved this issue (Has been locked in position). See pulser spectrum in > attachments 4 and 5 > > 23.15 DSSSD bias & leakage current Ok - see attachments 6-7 > FEE64 temperatures OK - see attachment 8 > > 00.05 DAQ start (R137) > Pulser Walkthrough > BNC PB_4 amplitudes 90,000-10,000 @ 10,000 step > x5 attenuator IN > t_r 50ns tau 50us > Frequency 250Hz range > Polarity -, tail pulse, delay MIN > > ASIC settings 2016Nov07-23.03.06 > > 00.21 DAQ start (R138) > Amplitude 14,000-2,000 @ 2,000 step > > 00.42 Background run R139 started. Pulser set to external trigger. > > 01.01 Run R139 closed successfully. > > 01.04 Started R140 on no storage mode to run overnight. > Leakage currents @ 01.06 shown in 9+10. > R140 still running ok @ 01.40.
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