ELOG DESPEC

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

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Entry time:	Sat Mar 29 11:24:06 2025
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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 Encoding: HTML ELCode plain Suppress Email notification

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