ELOG AIDA

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 12:36:51 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. Encoding: HTML ELCode plain Suppress Email notification

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