ELOG AIDA

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

AIDA

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Entry time:

Sat Oct 21 02:48:17 2017

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10:48 Adapter boards replaced for DSSD 1 &2 (FEEs 1,2,22 and 21)
      Previous boards were Rev D new boards are Rev E

System wide checks ok
      FEE Temperatures ok - Attachment 1

10:54 DSSDs biased up. Note that after new boards installed DSSD 1 and 2 had leakage currents of around 9uA
during ramp up
      Leakage currents appear to have dropped as they reach 100V set point
      T = 23.8 H = 45% D.P = +11.1
      Leakage and Bias ok - Attachment 2

11:11 Waveforms for FEEs 22, 21, 11 and 13 - Attachments 3 - 10
      Statistics - Attachment 11

14:00 System wide checks all ok 
      Leakage and bias ok - Attachment 12
      FEE temperatures ok - Attachment 13

14:26 Spectra comparing the values for nnaida waveforms for different Ibias LF Feedback values
      Values are indicated in image title. If not mentioned value 0x8 - Attachments 14 - 23

14:37 Spectra showing the effect of different slow comparator values on the sawtooth signal in the waveforms
      Spectra are all nnaida22 and slow comparator values in image titles - Attachments 24 - 26

Attachment      FEE     Change
           14          1      default
           15          1      LF 0xf
           16          2      default
           17          2      LF 0xf
           18          2      LF 0xc
           19          21     default
           20          21     default
           21          21     LF 0xf
           22          22     default
           23          22     LF 0xf
           24          22     LF 0xf SC 0xf
           25          22     LF 0xf SC 0xd
           26          22     LF 0xf SC 0xb

15:09 Raised slow comparator threshold to 0x40 ~ 640keV for all FEEs and all ASICs
      Hit pattern in attachment 27
      Statistics - Attachment 28

New adapter boards appear to have improved the amount of white noise at default ASIC settings
      This is shown with the decrease in statistics and also in the waveforms.
      At default settings the saw tooth patterns still appear in the waveforms though attenuated
      with lower frequencies and lower amplitudes.
      Further improvements can be gained in reducing the amplitude and frequency of the saw tooth
      patterns by changing the Ibias LF feedback value though care has to be taken that the pre-amp
      signal is not taken to the rails. Hence FEE 2 has a value of 0xc rather than 0xf like the others.
      Hit pattern checked for the pulser by raising the slow comparator threshold to 640keV. The boards that
      have been changed show a much more believable rate than those that haven't which are still showing
      higher than pulser rates.

16:09 The effect of changing the shaping time on the pulser widths was checked.
      Optimum still appears to be at around 8us

16:50 DAQ started writing to Oct17/R5 @ 8Mb/s
      nnaida 13 SC threshold at 0x20
      System wide checks ok
      Leakage and bias ok - Attachment 29
      FEE Temp ok - Attachment 30
      Statistics - Attachment 31

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Attachment 1:

211017_1050_feetemp.png Original size: 1270x673

Attachment 2:

211017_1056_bias.png Original size: 1009x341

Attachment 3:

211017_1106_22waveform.png Original size: 1271x834

Attachment 4:

211017_1108_wavform20zoom.png Original size: 1268x824

Attachment 5:

211017_1109_waveform22zoom.png Original size: 1265x776

Attachment 6:

211017_1110_waveform11zoom.png Original size: 1270x819

Attachment 7:

211017_1111_waveform13zoom.png Original size: 1267x825

Attachment 8:

211017_1114_waveform13.png Original size: 1267x822

Attachment 9:

211017_1115_waveform11.png Original size: 1265x825

Attachment 10:

211017_1115_waveform20.png Original size: 1269x821

Attachment 11:

211017_1112_stats.png Original size: 1273x507

Attachment 12:

211017_1357_bias.png Original size: 1017x342

Attachment 13:

211017_1358_temp.png Original size: 1268x666

Attachment 14:

211017_1402_waveform1zoom.png Original size: 1276x823

Attachment 15:

211017_1406_waveform1zoomLF0xf.png Original size: 1273x825

Attachment 16:

211017_1410_WAVEFORM2ZOOM.png Original size: 1266x822

Attachment 17:

211017_1413_waveform2zoomLF0xf.png Original size: 1270x830

Attachment 18:

211017_1415_waveformzoomLF0xc.png Original size: 1271x828

Attachment 19:

211017_1421_waveform21.png Original size: 1270x823

Attachment 20:

211017_1421_waveform21zoom.png Original size: 1266x824

Attachment 21:

211017_1422_WAVEFORM21zoomLF0xf.png Original size: 1268x824

Attachment 22:

211017_1424_waveform22zoom.png Original size: 1271x819

Attachment 23:

211017_1425_waveform22zoomLF0xF.png Original size: 1273x824

Attachment 24:

211017_1431_waveform22zoom_slowcomp0xF.png Original size: 1277x825

Attachment 25:

211017_1432_waveform22zoom_slowcomp0xd.png Original size: 1273x826

Attachment 26:

211017_1435_waveform22_slowcomp0xb.png Original size: 1269x832

Attachment 27:

211017_1508_hitpatter_JustPulser_SC640keV.png Original size: 1251x726

Attachment 28:

211017_1509_statsJustPulser_SC640keV.png Original size: 1279x511

Attachment 29:

211017_1651_bias.png Original size: 1008x343

Attachment 30:

211017_1653_feetemp.png Original size: 1276x671

Attachment 31:

211017_1653_stat.png Original size: 1276x513

Attachment 32:

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