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 11:35:47 2025
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> Throughout day: > DSSD2 (3058-25) would not bias, either short circuit or suspiciously low leakage current. > Carried out some test in situ which were inconclusive. > Removed snout and took DSSD2 out. > Measuring the resistance across the two pins providing the n+n bias yielded 20 Ohms. > For the p+n the same measurement saw an open circuit => at least one of the bond wires broken. > > DSSD1 (3131-9) was moved into the DSSD2 position and DSSD1 is now BB18-1000 3058-4. > > All detectors were biased downstairs and all looked fine - leakage currents of 3.1 - 3.8 uA. > > First detector sits 54.5cm from Al base plate and 10cm from the upstream end of the snout. > 9mm between each of the DSSDs. > > Stack now: > \| 3058-4 > b \| 3131-9 > e \| 2998-23 > a \| 3058-5 > m \| 3058-6 > V 3058-7 > > 207Bi source installed at end of snout. > > Snout moved upstairs and mounted. > DSSD2 would not bias. This was due to the HV cable providing bias for this DSSD having a short to ground. > Replaced with HV cable 7 and biased successfully. > All DSSDs now bias. Screenshots of leakage currents attached (attachments 4+5) at room temp 25.3oC. > Caen module Addr 00 provides bias to DSSDs 1, 2, 3 and 4 via channels 0, 1, 2 and 3 respectively. > Module Addr 01 provides bias to DSSDs 5 and 6 on channels 0 and 1, respectively. > > Snout pushed in to EURICA. > > 22.05 nnaida17 ASIC parameters not loading > power cycle & reboot > > nnaida5 (master) clock not locked - status 0x6 - see attachments 1-3 I suggest you check the hdmi hasn't been disturbed in the Macb or the FEE64.. Since the others are ok. I suggest it is the cable from the Macb to the FEE64 #5. If this fails to correct then please send a screen shot of the Local Controls status for nnaida5. Encoding: HTML ELCode plain Suppress Email notification

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