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exploring FGT response
Those are random plots, recording progress on understanding of FGT response
Feb 8 , examples of pules passed by simple filter (Attachement A), latency=87, HV=3600V
The pulses you see in PDF were found with this simple algo:
-ped from DB (thanks Renee) are subtracted from 7 ADCs , next
-applied this 4 cuts:
if(minAdc>100) continue;
if(maxAdc<200) continue;
if(maxAdc>3000) continue;
if(iMin>1) continue; // require minimum is in time bin 0 or 1
2 observation:
* this is just 4 minB events and the algo above found ~70 pulses. You can easily convert it to # of pulses per strip per hour of data taking - we will have a lot of data per hour of running. Now it is not based on some simulations - this is what we see in the real collision environment.
* count how often a non-physical pulse shape sneaked thrugh: 3 on page 4 and ... that is it. So the signal purity is of 95% - no shape fitting applied yet. This is really nice. (if you know what timing to use)
Feb 9, maching of amplitudes for R*P clusters, 3 random events, oct=3AS, attachement B
Feb 11 , inclusive spectra of highest strip in event as function of HV 3600, 3400
pulse-shape filter: minAdc<100, maxADC>200, minBin=0,1,or 2
Attachemnts C,D,E show spectra for 1A+B, 3A+B, 6A+B
Feb 12, fitted slope to a section of inclusive spectra
Attachemnt F - HV changed 300,3200,3400,3600, disc 1 fit range 500,1200,
Attachement G - gains vs. HV. proposed target gain=200
Feb 22, att. H, pulses selected with pulseSeedFinderA
Feb 22, Att,: I,J Pulse yield for 2 quadrants, missing voltage on one section is visible.
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