AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40
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Entry  Sun May 29 14:06:31 2016, TD, AE & CG, Sunday 29 May 2016 62.png63.png64.pngcaen_addr0_290616_2244.pngcaen_addr1_290616_2244.png
    Reply  Sun May 29 20:06:15 2016, TD, AE & CG - reply PJCS, Sunday 29 May 2016 
       Reply  Sun May 29 22:35:25 2016, TD, AE & CG - reply PJCS, Sunday 29 May 2016 70.png71.png72.png
          Reply  Sun May 29 23:28:56 2016, TD, AE & CG - reply PJCS, Sunday 29 May 2016 
             Reply  Sun May 29 23:55:15 2016, TD, AE & CG - reply PJCS, Sunday 29 May 2016 80.png81.png82.png83.png84.png
                Reply  Mon May 30 00:01:23 2016, TD, AE & CG - reply PJCS, Sunday 29 May 2016 90.png91.png92.png93.png94.png
                   Reply  Mon May 30 00:07:56 2016, TD, AE & CG - reply PJCS, Sunday 29 May 2016 
Message ID: 247     Entry time: Sun May 29 14:06:31 2016     Reply to this: 248
Author: TD, AE & CG 
Subject: Sunday 29 May 2016 
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
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