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AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
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AIDA |
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Message ID: 939
Entry time: Mon Dec 11 23:56:36 2023
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Author: |
TD |
Subject: |
Tuesday 12 December |
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00.55 Observe high frequency noise in aida02 & aida04 ( n+n FEE64s ) - attachments 1-5
and aida05 ( p+n FEE64 )
frequency c. 5MHz
Oscillation unchanged by
HV cycle
ASIC control load
FEE64 power cycle
BNC PB-5 pulser OFF
BNC PB-5 pulser output disconnected from test + cable ( and remains disconnected )
BB7 HV and preamp power OFF - oscillation disappears
Note - BB7 HV and power have been on all day and AIDA was running OK until at least 22.18 11.12.23 - go figure!
01.42 file DEC23/R7
02.00 checks
DSSSD bias -150V leakage current -5.980uA - attachment 5
FEE64 teperatures OK - attachment 6
ADC data item stats OK - attachment 7
Merger & TapeServer screens - attcahments 8 & 9
per FGEE64 Rate spectra - attachment 10
1.8.W spectra - 20us FSR - attachments 11 & 12
02.18 ASIC check load x2
02.20 file DEC23/R8
Final FRS setting - fragments SE 238U, PID uncertain online
02.22 zero all spectra & stats
03.23 degrader changed to 4350mg
file DEC23/R9
03.25 zero all spectra & stats
06.00 beam stopped
file R9 closed
06.18 pulser walkthrough test -
BNC PB-5
amplitude 9.0-1.0 @ 1.0V step
attenuation x10
polarity -
tail pulse
1ms decay time
file DEC23/R11
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