AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Entry time:
Thu Jan 22 13:50:33 2015
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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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