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:	Wed Apr 2 01:41:43 2025
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<p>06/02/15</p> <p> A look at the data rate at which Pause/Resumes start to cause missing data.</p> <p>Pulser settings:</p> <ul> <li>100 Hz</li> <li>0.5V amplitude</li> </ul> <p>Slow comparitor thresholds were altered using the ASIC4 page to artificially increase the data rate in the ASICs.</p> <p>Default settings for all modules, apart from the changing slow comp threshold.</p> <p>nnaida13+14 both functioning well. nnaida11+12 both have one noisy channel contributing to high data rate.</p> <p> </p> <p>Echoing Alfredo's previous post, using the AIDA Good Events and AIDA Data Rate from the stats page as metrics, I found there to be no Pause/Resume items present in the data up to a Good Events rate of ~250-300 kHz and Data Rate of ~1-1.2 MHz.</p> <p>Around this point the data shifts very quickly from containing no Pause/Resume items to having a rate of ~18 Hz, almost as a step function. At this point the Good Events and AIDA data rate sharply reach a maximum rate of 300 kHz and 1.2 MHz respectively. The rate of AIDA SYNC data items drops sharply at this point and decreases slowly with decreasing threshold.</p> <p>Included are some plots showing this for each of the modules and some summary plots.</p> <p>Further to the data rate at which the appearance of Pause/Resume items causes significant data loss, I looked at what happens when you break this threshold and then come back down, i.e. do the Pause/Resume items persist?</p> <p>In short, no. Starting from a threshold of 64 and working down to 1, then taking the slow comparitor threshold back to a level at which no Pause/Resumes were present, the Good Events, AIDA SYNC and AIDA Data rates all went back to their original values within a couple of refreshes of the stats screen (and stayed as such thereafter).</p> Encoding: HTML ELCode plain Suppress Email notification

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