ELOG ISOLDE

AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40

ISOLDE

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Entry time:	Sat Dec 6 06:04:40 2025
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> Objective log on perceived issues. (As a benchmark, I enumerated 17 such issues on my previous RIB experiment March 2017.) > > In no particular order... > > 1) Sun PC: > Cannot properly connect to internet, disallowing SSH access > Important for external monitoring > Better to control DAQ from ISOLDE data room in case of ISOLDE issues > Connecting to CERN network screwed with DNS, borking local DNS hence DAQ > Double mouse clicking often skipped run numbers > > 2) Vacuum: > Barely acceptable, and manual gate valve leaked! > Keep in mind, interlock system showed higher than true values > 44Ti requires a gas cell and vacuum load may increase considerably > (Chamber needs gas-feedthrough lines and gas-flow control system) > Cooling lines are known to leak badly > > 3) SSDs: > HI detector leak current increased considerably during the run > Noisy n-n sides > To be discussed > > 4) Scalers > Scalers were made with noisy n-n sides, making interpretation confusing > We lacked LEMO cables to provided summed p-n scalers > > 5) Decay halflife > A simple handheld monitor turned out to be effective for 59Cu > That won't work for 44Ti ... > > 6) Unused aparatus should be minimized > (Time & money) > Photodiodes > ZnS screen / camera > Manual gate valve (see above) > > 7) Shift plan/schedule > No definitive plan -- need pre exp. meeting > Shift schedule became arbitrary, w/ several flip/flops > RP requirements limited access to chamber > > 8) Shift work > Run log was made with short notice > Style may not be ideal for data analyst > Copy/paste errors et al were observed > Deadtime log was suggested to be added > (Other issues might be circumvented w/ SSH access to Sun PC) > > 9) Purpose > Detail & motivation of exp. was not clear to all members > > 10) Faraday Cup > Data taken by TIMBER system, which is better to integrate w/ our DAQ > Strange non-physical fluctuations which we like ISOLDE team to resolve > Timestamp differences of Sun PC and TIMBER PC? > > 11) Silena HV module > Module was found to falsely report applied bias > > 12) Alpha calibration / pulser walkthrough > Lacking prior to experiment owing to manpower and technical difficulties > > 13) Sort codes and simulations > It was common to discuss received vs. expected data w/o fast clear answer Encoding: HTML ELCode plain Suppress Email notification

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