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 Mar 29 11:16:03 2025
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> > Upstream, 207Bi source > > DSSSD #1 nnaida 6 & 9 (p+n), nnaida 11 & 16 (n+n) > > DSSSD #2 nnaida 2 & 5 (p+n), nnaida 4 & 7 (n+n) > > DSSSD #3 nnaida 1 & 14 (p+n), nnaida 3 & 8 (n+n) > > N/C nnaida 10 & 13 (p+n), nnaida 12 & 15 (n+n) > > 3x MSL type BB18(DS)-1000 DSSSDs connected via 12x flexible Kapton PCB cables to 8x adaptor PCBs > > > Hit patterns show attachments 1-16 > > > Default ASIC parameters except slow comparator 0x10 -> 0x20 > > Example ASIC configuration attachment 17 > > Example 'Good Events' statistics attachment 18 > > > ASIC #1 waveforms of nnaida 1 - 16 enabled > > Example waveform for p+n and n+n strips of each DSSSD attachments 19-24 > > > Parameters saved to: /MIDAS/DB/EXPERIMENTS/AIDA/2015Apr26-10.56.40 > > > 12.10 Removing bias gnd jumper from p+n adaptor PCBs increases amplitude of ~100kHz RFI/EMI > (attachment 25) > > 15.20 Reduce DSSSD configuration to 1x DSSSD using 4x adaptor PCBs + heavy duty copper braid > DSSSD #2 nnaida 2 & 14 (p+n), nnaida 4 & 7 (n+n) > > attachments 26-33 show example preamp traces and ASIC#1 spectra > > similar stability/performance to previous tests with a single DSSSD, typical pulser > peak widths ~130-200 ch FWHM > > AIDA snout drain wire - no obvious difference if connected, or not (as before) > > 15.40 DSSSD configuration 2x DSSSD using 8x adaptor PCBs > DSSSD #2 nnaida 2 & 14 (p+n), nnaida 4 & 7 (n+n) + heavy duty copper braid > DSSSD #1 nnaida 6 & 10 (p+n), nnaida 11 & 16 (n+n) + black jumper cables from above adaptor PCBs > to these adaptor PCBs > Detector bias from N1419 and N1419B, i.e. separate NIM modules => separate floating grounds > similar or improved performance to 1x DSSSD test, typical pulser peak widths ~115-250 ch FWHM > > 16.15 CG smartphone camera pictures of front end config > > 16.30 data to disk - file /Tapedata/May2015/R3_0.gz (BNC Pb-4 25Hz + 207Bi source) > > 17.30 Detector bias from N1419, i.e. both detector biases from same NIM module => same floating ground > for both DSSSDs > > Similar performance to case above (separate NIM modules) > > 17.46 data to disk - file /Tapedata/May2015/R4_0.gz (BNC Pb-4 25Hz + 207Bi source) Encoding: HTML ELCode plain Suppress Email notification

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