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 May 2 02:04:50 2015

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0055: Degrader changed. 1mm removed.
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1.4mm total
0537: R38 ends nnaida11 slow comparator 0x20 -&gt; 0x40 LEC fast comparator -&gt; 0xff
0530: R39 10.00 AIDA status screenshots
1159: R39 ends HEC fast comparator 0x2 -&gt; 0xf (all FEE64s)
1202: R40 nnaida8 no SYNCS see attachments 19-22
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; VFEP toggled merge pause state check merge activity spinner accelerates nnaida8 GO Electronics (from select required function menu of Run Control) nnaida8 started OK toggled merge pause state
1500: Attachments 23-28 show waveforms, low E and high E spectra for nnaida6+11.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Increasing fast comp threshold to 0xf shifts position of energy cut off away from zero point, as expected, but does not remove low E peak around ch 32500.
1530: Increase bias to +150V on det 1 (ch 1). Attachments 29-34 show waveforms, low E and high E spectra with increased bias voltage. Diode link threshold at 0x23
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; V high E events in .L spectra show reduction over those before bias increase.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; In .H spectra from both nnaida6+11, increased bias reduced threshold. Finite threshold still seen on n-side however (greater than on p-side).
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; All references/comparisons in this ELog entry re. nnaida11 are w.r.t. to spectra/waveforms seen at this 'standard' setting.
1544: Changed diode link thresh on nnaida11 to 0x11. Attachments 35-37.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Saved run R42.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; High energy spectra saw threshold increase of ~700ch, but no other changed were observed.
1555: Change nnaida11 diode link thresh to 0x29. Saved run R43. Attachments 38-40.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Saw reduction in high E threshold by ~700 ch but no other obvious changes.
1610: Changed diode link thresh on nnaida11 to 0x14 and preAmp reference to 0x20. Saved run R44. Attachments 41-44.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Waveforms look much worse, more flatlining that previously seen.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; High E spectra show marginally higher threshold. No significant change in low E spectra.
1630: Changed nnaida11 preAmp ref to 0x40 and diode link thresh to 0x38. Saved run R45. Attachments 45-47
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Waveforms look similar to original setting. High E spectra show no significant change.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Low E spectra have small peak near 32k and v. wide stretching to top of FSR.
1643: Changed nnaida11 preAmp ref to 0x60 and diode link thresh to 0x58. Saved run R46. Attachments 48-50.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Waveforms settled on ~7500 much more frequently, with most signals beginning and returning to ~7500.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; High E spectra thresh at ~33500 as it was with 'standard' setting.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Low E spectra show vast reduction in high E rubbish, looking more like an exponential decay compared to previous wide 'mound'.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Big improvement over previous settings. Will try all n-side FEE with these settings later.
1700: Changed nnaida11 diode link thresh to 0x5a. Saved run R47 (~2hr run during tea break and other work).
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0x60 HEC fast comparator threshold (all FEE64s except nnaida30) 0x02.
19.04 R47 ends Change BigRIPS setting from 110Zr to 88Ge
19.15 R48 Pulser walkthough BNC PB-4 amplitude 90,000-10,000 @ 10,000 step, freq 25Hz.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; nnaida7 showed no SYNCS.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Used procedure described above (1202) - nnaida7 recovered OK
19.28 Started run R48 - pulser walkthrough.
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; R48 ends OK..
1944: Changed fast comparator threshold on LEC for...
<ul>
 <li>nnaida 1: 0xb -&gt; 0x30</li>
 <li>nnaida2: 0x18 -&gt; 0x30</li>
 <li>nnaida6: 0x10 -&gt; 0x30</li>
 <li>nnaida10: 0x10 -&gt; 0x30</li>
 <li>nnaida13: 0x12 -&gt; 0x30</li>
 <li>nnaida14: 0x14 -&gt; 0x30</li>
</ul>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Change, for all n-side FEE64s, preAmp reference from previous value to 0x60 and diode link thresh to 0x5a.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Saved settings to /MIDAS/DB/EXPERIMENTS/AIDA/2015Apr30-diode-mod3
&nbsp;(around) 20:30 pm: started data taking for 88Ge setting. First runs are with empty H target at MINOS/DALI for transmission measurement.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Degrader also changed during run R50. Initially: 0.6mm + 0.4mm + (0.3 mm?) + 1mm. The 1mm degrader was removed after ~ 1hr of run.
&nbsp;
2300: NNAIDA#11: changed Fast Comparator of Low Energy channels to 0x40. It was set at 0xFF, and no discriminator data being produced. Rate of ~12 kHz for discriminator events in NNAIDA#11 for this setting (comparable to other FEE64s).
&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; RUN: R51_* started after adjusting the NNAIDA11 setting

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