ELOG CARME

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

CARME

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Entry time:

Sat Feb 12 19:48:38 2022

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&gt; Initial grounding see final grounding from elog 187. ASIC settings for all - LEC slow comparator 0x64. Note on 11/02/22 1.8*L widths with same settings were aida1-4: 300,240,250,260

ADC data items &lt;10k

Good events fluctuate 10k-20k

1.8*L pulser widths aida1-4: 433,400,375,375(double peak)

Attachments 1-4

&gt; New grounding implemented. 3mm grounding cable connect fee body to adaptor board. Each adaptor board is then connected directly to the cryring ground. Attachements 10-11

ADC data items &lt;10k

Good events fluctuate 10k-20k

1.8*L pulser widths aida1-4: 340,288,288,295 (reduced double peak)

Noise in the system also seems to have decreaed in zoomed out 1.8*L plots (not attached). Aida1 still shows large noise peak channel 32000 on 1.8*L. 1.8*W no significant&nbsp;change, perhaps slightly reduced.

Attachements 5-9

Screencaps for following movement tests not taken as 1.8*L and 1.8*W spectra appeared the very similar&nbsp;as 5-9 except for slightly different&nbsp;widths.&nbsp;&nbsp;

&gt; Detectors moved&nbsp;in and out (pneumatic). Leakage current dropped by ~0.2 uA, torque now reads +2.8 previously was ~0.&nbsp;

no change to ADC data items or good events. During movement aida3 saw momentary increase in good events to ~40k before returning to normal range. Rest of fees good events stats unaffected by movement.

1.8*L pulser widths aida1-4: 413,313,295,306

&gt; servo motor (only) moved, torque reduced back to ~0

no change in good events stats for any fees during servo movement.&nbsp;

1.8*L pulser widths aida1-4: 425,335,316,288

&gt; Detector moved to IN position (pnuematic and servo). 19.3mm to 81.8mm on potentiometer.&nbsp;

No change to good events. During movements aida3 saw momentary increase in good events to ~41k, all other fees unaffected.&nbsp;

1.8*L pulser widths aida1-4: 302,221,305,293&nbsp;

Noise peak at channel ~32000 on aida 1 (1.8*L) significantly reduced. little noise on other fees&nbsp;

&gt;Detector moved to fully OUT position (pneumatic and servo).&nbsp;

no change in good events, during movement aida3 saw momentary increase to ~35k

1.8*L pulser widths aida1-4: 450,350,316,290

Noise peak at chn 32000 on aida 1 has increased to previous size. little noise on other fees.&nbsp;

&gt; Bias increased to 120V. Leakage current stable however slightly higher ~0.1&nbsp;uA

no change in good events.&nbsp;

1.8*L pulser widths aida1-4: 447,345,189,301

&gt; Bias increased to 140V, increase in leakage current ~0.2 uA, appears stable. Increase to 150V, fluctuate in leakage current of +/-0.5uA then huge increase to &gt;20uA trip.&nbsp;

&gt; Fee power cycle. Bias 100V, leakage current 9.9 uA ~0.1-0.2 uA higher than previous but stable.&nbsp;

no change to good events

1.8*L pulser widths aida1-4: 468, 350,311, 296

&gt; Some decrease seen with new grounding, however main source of noise still apparent and any decrease seems insignificant compared to changes due to position movement.&nbsp;

&gt; Water pipes have been zipped tied so they no loger touch motors, no change in pulser widths or noise levels however.&nbsp;&nbsp;

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