AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Entry time:
Sun Mar 30 09:18:14 2025
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<p>0055: Degrader changed. 1mm removed.</p> <p> 1.4mm total</p> <p>0537: R38 ends nnaida11 slow comparator 0x20 -> 0x40 LEC fast comparator -> 0xff</p> <p>0530: R39 10.00 AIDA status screenshots</p> <p>1159: R39 ends HEC fast comparator 0x2 -> 0xf (all FEE64s)</p> <p>1202: R40 nnaida8 no SYNCS see attachments 19-22</p> <p> 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</p> <p>1500: Attachments 23-28 show waveforms, low E and high E spectra for nnaida6+11.</p> <p> 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.</p> <p>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</p> <p> V high E events in .L spectra show reduction over those before bias increase.</p> <p> In .H spectra from both nnaida6+11, increased bias reduced threshold. Finite threshold still seen on n-side however (greater than on p-side).</p> <p> All references/comparisons in this ELog entry re. nnaida11 are w.r.t. to spectra/waveforms seen at this 'standard' setting.</p> <p>1544: Changed diode link thresh on nnaida11 to 0x11. Attachments 35-37.</p> <p> Saved run R42.</p> <p> High energy spectra saw threshold increase of ~700ch, but no other changed were observed.</p> <p>1555: Change nnaida11 diode link thresh to 0x29. Saved run R43. Attachments 38-40.</p> <p> Saw reduction in high E threshold by ~700 ch but no other obvious changes.</p> <p>1610: Changed diode link thresh on nnaida11 to 0x14 and preAmp reference to 0x20. Saved run R44. Attachments 41-44.</p> <p> Waveforms look much worse, more flatlining that previously seen.</p> <p> High E spectra show marginally higher threshold. No significant change in low E spectra.</p> <p>1630: Changed nnaida11 preAmp ref to 0x40 and diode link thresh to 0x38. Saved run R45. Attachments 45-47</p> <p> Waveforms look similar to original setting. High E spectra show no significant change.</p> <p> Low E spectra have small peak near 32k and v. wide stretching to top of FSR.</p> <p>1643: Changed nnaida11 preAmp ref to 0x60 and diode link thresh to 0x58. Saved run R46. Attachments 48-50.</p> <p> Waveforms settled on ~7500 much more frequently, with most signals beginning and returning to ~7500.</p> <p> High E spectra thresh at ~33500 as it was with 'standard' setting.</p> <p> Low E spectra show vast reduction in high E rubbish, looking more like an exponential decay compared to previous wide 'mound'.</p> <p> Big improvement over previous settings. Will try all n-side FEE with these settings later.</p> <p>1700: Changed nnaida11 diode link thresh to 0x5a. Saved run R47 (~2hr run during tea break and other work).</p> <p> 0x60 HEC fast comparator threshold (all FEE64s except nnaida30) 0x02.</p> <p>19.04 R47 ends Change BigRIPS setting from 110Zr to 88Ge</p> <p>19.15 R48 Pulser walkthough BNC PB-4 amplitude 90,000-10,000 @ 10,000 step, freq 25Hz.</p> <p> nnaida7 showed no SYNCS.</p> <p> Used procedure described above (1202) - nnaida7 recovered OK</p> <p>19.28 Started run R48 - pulser walkthrough.</p> <p> R48 ends OK..</p> <p>1944: Changed fast comparator threshold on LEC for...</p> <ul> <li>nnaida 1: 0xb -> 0x30</li> <li>nnaida2: 0x18 -> 0x30</li> <li>nnaida6: 0x10 -> 0x30</li> <li>nnaida10: 0x10 -> 0x30</li> <li>nnaida13: 0x12 -> 0x30</li> <li>nnaida14: 0x14 -> 0x30</li> </ul> <p> Change, for all n-side FEE64s, preAmp reference from previous value to 0x60 and diode link thresh to 0x5a.</p> <p> Saved settings to /MIDAS/DB/EXPERIMENTS/AIDA/2015Apr30-diode-mod3</p> <p> (around) 20:30 pm: started data taking for 88Ge setting. First runs are with empty H target at MINOS/DALI for transmission measurement.</p> <p> Degrader also changed during run R50. Initially: 0.6mm + 0.4mm + (0.3 mm?) + 1mm. The 1mm degrader was removed after ~ 1hr of run.</p> <p> </p> <p>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).</p> <p> </p> <p> RUN: R51_* started after adjusting the NNAIDA11 setting</p>
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