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:

Sun Apr 7 12:02:23 2024

Author*:

Subject*:

13.00 Cooling water temperature and flow OK - attachment 1

Test of AIDA 2x MSL type BB18(DS)-1000 24cm x 8cm DSSSDs 'as is' ( to be defined later in this Elog )

DSSSD bias & leakage current OK - attachment 2
      Ambient temp 24.7 deg C, d.p. 7.1 deg C, RH 32.4%
      Leakage current c. 6.6uA => 4nA/cm2/100um ( very good )

FEE64 temps OK - attachment 3
      *except* aida02 ASIC temp which is known to be u/s

All system wide checks OK *except* aida02 and aida04 WR decoder status - attachment 4

WR timestamps OK - attachment 5

WR (info code 4 & 5), correlation scaler, PAUSE, RESUME, DISC, ADC data item stats - attachments 6-12

per FEE64 Rate spectra - attachments 13-15

per 1.8.W spectra - 20us FSR - attachments 16-1710129

14.45 FEE64 config check - per https://elog.ph.ed.ac.uk/DESPEC/562

FEE64 # PSU cable #           MAC
1       1                     ?
2       2                     ?
3       3                     ?
4       4                     41 ee 71
5       5                     ?
6       6                     ?
7       7                     f6 5a
8       8                     41 d7 cd
9       ?                     ?
10      10                    41 d0 0e
11      11                    41 ee 0f
12      ?                     ?
13      13                    ?
14      ?                     0d 15
15      15                    ?
16      16                    f6 ed

? = no line of sight

- AIDA FEE64 PSU cabling - see attachment 18

Currently

PSU #1 1-3, 2-4, 9-5, 15-12
PSU #2 14-7, 6-8, 10-13, 11-16

Should be changed to

PSU #1 1-3, 2-4, 9-15, 5-12
PSU #2 14-7, 6-8, 10-11, 13-16

- AIDA snout mount to support frame - attachments 19 & 21
LHS ( looking downstream ) incorrect, RHS OK

- LKs
LK1 fitted aida02, aida04, aida06, aida08
LK3 fitted aida03, aida07, aida01, aida14

Significant gaps in snout ( i.e. possible light leaks ) where bPlas cabling exits snout - attachments 20 & 22

bPlas driver PCBs removed 
bPlas ribbon cables, drain wires and Lemo 00.250 cabling disconnected - some cabling/drain wires touching snout etc

15.15 Adjust bPlas ribbon cables/drain wires/Lemo cables to ensure that none are touching snout or AIDA support frame - significant improvement

DSSSD bias & leakage current OK - attachment 23

FEE64 temps OK - attachment 24

ADC data item stats - attachments 25

per FEE64 Rate spectra - attachments 26
       6x FEE64s < 20k. all FEE64s < 120k ( cf. 4x FEE64s < 20k, 5x FEE64s > 100k, 1x FEE64 320k earlier - attachment 12 )

per 1.8.W spectra - 20us FSR - attachments 27-28

17.15

LHS top hat washers
LK1, LK3
PSU power cables
tighten gnd screws
attachments 29-34

Note that some of the newly installed FEE64s have the incorrect rails fitted - FEE64s may ground to AIDA support stand

17.55 CAEN N1419ET LK removed -> floating outputs

18.15 +LK1 restored
attachments 35-40

18.40 +pwwer cycle
attachments 41-46

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ELOG V3.1.4-unknown