ELOG DESPEC

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

DESPEC

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Entry time:

Thu Oct 12 14:01:43 2023

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DSSSD MSL type BB18 24cm x 8cm 3208-3/3208-21/3208-22

FEE64 configuration see https://elog.ph.ed.ac.uk/AIDA/872 attachment 2

Bias -150V -6.590uA ambient temperature +24.7 deg C d.p. +13.7 deg C RH 50.3%

BNC PB-5
amplitude 10.0V
attenuation x10
decay time 1ms
tail pulse
frequency 25Hz

PB-5 output direct to p+n junction side FEE64 aida01 or aida12, or n+n Ohmic side FEE64 aida02

aida01 1.8.L pulser peak width  61 ch FWHM ~  46keV FWHM => 5s threshold 98keV 
aida12 1.8.L pulser peak width  56 ch FWHM ~  42keV FWHM => 5s threshold 89keV
aida02 1.8.L pulser peak width 102 ch FWHM ~  77keV FWHM => 5s threshold 163keV

slow comparator  0xa 100keV ( all p+n junction FEE64s ) 
                 0xf 150keV ( all n+n Ohmic FEE64s )

per FEE64 Rate spectra - attachment 1
 p+n FEE64s ( aida010, aida01, aida09, aida12, aida03, aida11 ) rates dominated by hot channels, other channels typically <1Hz ( 25Hz pulser to aida12 )
 n+n FEE64s ( aida02, aida04 ) rates ~ 10-20Hz/channel
 Note aida06 and aida08 are not connected to anything and should be ignored

ADC data item stats - attachment 2

For further information see https://elog.ph.ed.ac.uk/AIDA/906 and https://elog.ph.ed.ac.uk/AIDA/907

To Do

- repair/replace Honeywell HSS-DPS dew point sensor
   USB-controlled ac mains relay interlock currently overrriden
   do NOT operate AIDA unattended

- aida04 asic #1 u/s - replace ASIC mezzanine

- electrically isolated test signal distribution box req'd

- aida10 asic #4
   v. high rates observed and large signal transients 
   cause unclear ... ASIC/adaptor PCB/cabling/Si wafer ?

- extended background alpha run to check all DSSSD bond wires
   pulser OFF
   slow comparator 0x64

- bPlas + 2x triple DSSSD + bPlas stack assembly and test

- all up, in beam test

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Attachment 1:

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Attachment 2:

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Attachment 3:

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ELOG V3.1.4-unknown