AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Entry time:
Fri Mar 28 20:47:03 2025
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> Jan 20, 2015 > > Test settings: DSSD biased at 100V, with 3.5 uA leakage current. Pulser at 0.5 V, split and inverted for both > positive and negative polarity. Frequency at 100 Hz. > > > ++SHAPING TIME++ > > We varied shaping time (Tsh), and adjusted hold time (Th) accordingly. We measured the width of pulser spectra > for two channels using 'integrate' function of spectrum browser. > > Tsh Th nnaida#11-2.6L nnaida#13-2.6L > [usec] [usec] FWHM [ch] FWHM [ch] > 0.5 2 146 109 > 1 2 133 113 > 2 2 131 116 > 4 6 130 126 > 8 8 145 136 > > note: Tsh= ( 0.5*offset9 + 0.5) usec, Th= 2*offset7 usec > > The first two data points where saved to file R44_0.gz, and R45_0.gz. Starting from the Tsh=2usec measurement, > NNAIDA#12 was causing communication issues with the merger/tape server, so we don't have files for last few. > > Due to limited storange in AIDA PC, data was stored to external drive provided by Vic > (/media/data/TapeData/Test100/), and backued up temporarly also in Edinburhg > (/Disk/ds-sopa-personal/aestrade/data/AIDA/). > > > ++THRESHOLDS++ > > Next step was to adjust threshold of the slow comparator, in order to lower them and take data looking for > background alpha radioactivity. > > At this point NNAIDA#13 had stopped producing data (probably similar issue as NNAIDA#12, which could be > recovered with power cycling FEEs), so we used nnaida#14 > > FEE Eth rate/channel integral(pulse peak):integral(noise peak) > nnaida#11 0x40 115 Hz (~only pulser) > nnaida#14 0x40 115 Hz(~only pulser) > > nnaida#14 0x20 ~350 Hz 2:1 > > nnaida#11 0x10 ~150 Hz 1:2 (one channel very noisy @ 15kHz) > nnaida#14 0x10 ~5 kHz (asic 1-3) 80:1 > 0x10 ~3kHz-100 Hz (asic 4) > > > For background run (see next elog entry) threshold values set at: > nnaida#11= 0x16 > nnaida#12= 0x40 > nnaida#13= 0x20 > nnaida#14= 0x16
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