AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Entry time:
Wed Dec 2 18:39:44 2015
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<p>Powered on system ok.</p> <p>Electrical connection between crate and mezzanines still persists, but only to the top cool plate (no connection to the bottom or sides), eith resistance ~5-10 ohms</p> <p>Seems to have no effect on performance though as without the kaptons connected, still see pulser widths of ~14ch at t_shape = 8us.</p> <p>Connecting cables reinstates double peaking in n-side.</p> <p>Without HV or detector connected, nnaida13+14 gibe single Gaussian peaks of width ~45ch, with almost perfect waveforms.</p> <p> - Patrick saw this too, I'm not going crazy, but on zeroing histograms (didn't change a single other thing) it went back to having double peaks again.</p> <p>Replaced nnaida13 shielded kapton with unshielded one to see if that is causing this effect</p> <p> - still see double peaking but width of tallest peak is down by ~25% (likely just due to capacitance)</p> <p>With shielding on, do see much noisier waveforms however.</p> <p> - note: attachments 1 and 2 were taken using exactly the same threshold of 512. When shielded, bumping this up to 1000 still made little difference and 'actual' traces were only caught ~25% of the time</p> <p>Changed firmware to V8.</p> <p>No difference in performance.</p> <p> </p>
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Attachment 1:
nnaida14_wav_noHVnoDetNoShielding.png
Original size: 1445x1029
Attachment 2:
nnaida14_wav_noHVnoDetWithShielding.png
Original size: 1445x1029
Attachment 3:
all1.8.L_noDetShaping2us.png
Original size: 1920x1080
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