ELOG CARME

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

CARME

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Entry time:

Sat Jan 13 14:25:05 2024

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Connected all FEEs.

The two top fees corresponding to the bottom right detector are connected to damaged flexi rigid PCBs. The top one is missing an pin that should not be connected to anything, while the bottom one has a slightly cracked connector and is missing the top left pin. Spares should be in Edinburgh.

Found that the flexi rigid PCB connected to the bottom most FEE of the bottom-left detector has a damaged ground lemo connector. Possibly pulled during mounting? The bias cables were off most of the time. Seems to bias fine using the other bias lemo, but not ideal.

Attached, a V-I plot of the four detectors being biased. Note bottom-left was only biased to 120V vs. 150 since it shows relatively high leakage current. Time is wrong - bias was given over ~2 minutes. Unclear why the x-axis is incorrect.

Leakage currents for all detectors, and especially bottom-left and bottom-right drop significantly waiting a sufficently long amount of time, e.g. down to ~5.5 uA after 15 minutes.

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To create this plots in case it is needed.

ssh to CARMEbakingpi

cd Programs/caenlogger

python3 caenlogger.py

This will capture the data and pass it to the server (carme-gsi) in ~/caen_current.dat where they will be APPENDED. Delete / save / move the file from the CARME server if required. Backups are in Programs/caenlogger/bias_logs

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THEN Bias on

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THEN

ssh carme-gsi

cd Programs/caenlogger

gnuplot plot_current.gp

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