17.32 Power and detector bias cycle

      DSSSD bias & leakage current OK - attachment 1

      FEE64 temperatures OK - attachment 2
       *except* aida02 ASIC temp u/s

      ASIC settings 2024Mar27-11.25.32
       slow comparator p+n FEE64s 0xa (100keV), n+n FEE64s 0xf (150keV)

      BNC PB-5 pulser
      amplitude 10.0V
      attenuation x10
      frequency 25Hz
      polarity -
      tau_d 1ms
      tail pulse

      test - distributed by daisy chain to n+n FEE64s - chain terminated by 50 Ohm - currently connected to pulser

      test + distributed by daisy chain to p+n FEE64s - chain terminated by 50 Ohm - currently disconnected from pulser

      All system wide checks OK *except* aida02 & aida03 WR decoder status errors - attachment 10

      WR timestamps OK - attachment 11

      ADC data item stats - attachment 3
       12 of 16 < 20k, all < 100k

      per FEE64 Rate spectra - attachment 4

      per n+n FEE64 1.8.L spectra - attachment 5

      1.8.W spectra - 20us FSR - attachments 6-9
       preamplifier output noise generally very good

*Current ground configuration*

CAEN N1419ET LK fitted (non floating outputs)

ground cable from aida04-aida12-aida02-aida09-aida01-aida05
HV#0 aida12-aida03-aida15

ground cable from aida08-aida16-aida06-aida10-aida14-aida13
HV#1 aida16-aida07-aida11

LK3 fitted aida03, aida07

LK1 fitted aida02, aida04, aid06, aida08

test - distributed by daisy chain to n+n FEE64s - chain terminated by 50 Ohm - currently connected to pulser

test + distributed by daisy chain to p+n FEE64s - chain terminated by 50 Ohm - currently disconnected from pulser

all DSSSD ribbon cable drain wires grounded to their resepctive AIDA adaptor PCBs

JB observed open circuit between AIDA Al snout and AIDA support frame ( as expected )

AIDA PSU cabling as reported https://elog.ph.ed.ac.uk/DESPEC/560

Snout configuration:

- all bPlast cables are disconnected and floating. 
- CC taped up all the cables and exit points in snout.
- CC, JB covered the exit of the snout with two additional layers of aluminium foil which were also taped shut.


To Do:

- repower detector, see if similar conditions persist.
- disconnect test - pulser, again see if conditions persist.

- aida04 asic#1 investigate noise
- aida14 asic #1 & asic #2 u/s? replace ASIC mezzanine?