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LED events use for noisy channels detection

LED events use for noisy channels detection. Try on HCAL LED stability run 24432, 10K events. Idea : use LED containing events to check Pedestals : <>, sigma LED : sigma/<> Errors, e.g. -256 ; -999 entries etc

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LED events use for noisy channels detection

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  1. LED events use for noisy channels detection Try on HCAL LED stability run 24432, 10K events

  2. Idea : use LED containing events to check • Pedestals : <>, sigma • LED : sigma/<> • Errors, e.g. -256 ; -999 entries etc • Noise classified, positive or negative, big (i.e. direct danger to L0) or small (under certain conditions could degrade L0 rate, resolutions etc) amplitude : rate Logic for each channel : • Fit pedestal and LED, extract <>, sigma for each of them • Classify and count everything which outside <ped> \pm 10 x sigma_ped && outside <led> \pm 10 x sigma_led • NB1 : fit failure could signify a problem • NB2 : to escape Xtalk, remove event from Pedestal treatment, if one of three channels, coupled to the same ADC, shows big signal <l>±10σled <p>±10σp big neg 0 small 32 • Store warnings and (problematic/all ?) histograms in log-file

  3. Approximation “zero” constants (Close to) Ideal world :  impossible to study noise rate, if pedestal and/or led cannot be fit properly, i.e. not more than one problem at a time  we assume routine running on the debugged hcal 1. Error values : -256 ; -999 ; etc. 2. Pedestal warning if : meanped > 1.  or meanped  < 0. or σped > 2. 3. Led warning if : multiple peaks or σped/meanped  >  5% 4. Exclude from noise rate counting regions meanped ± 10 x σped and meanled ± 10 x σled 5. “Big” (L0 dangerous) noise starts from 32 ADC channel 6. Dangerous rate for “big” amplitude noise : 1% , “small” noise : 10%.

  4. Good channel example

  5. Pedestal warning Warning : <ped> = 1.1 sigma = 2.1

  6. Pedestal warning Warning : <ped> = 1.2 sigma = 2.1

  7. C-side, wrong settings Warning : Fit failure Warning : Fit failure

  8. C-side, wrong settings Warning : LED chi2

  9. C-side, wrong settings Warning : LED : sigma/<led>

  10. X-talk ? Warning : “small” noise

  11. X-talk ?

  12. Log.dat : example ... Checking Pedestal mean and sigma values ... board=386, channel=31, pedChi2=148, pedMean=1.030888, pedSigma=2.185785 board=399, channel=24, pedChi2=163, pedMean=1.204062, pedSigma=2.036628 board=411, channel=28, pedChi2=1037 ... Checking Led sigma/mean values ... Problem LED chi2 : board=388, channel=24, LedChi2=1100 Problem LED chi2 : board=388, channel=26, LedChi2=1166 Problem LED chi2 : board=389, channel=19, LedChi2=1068 ... Checking for -999 ... ... Checking for -256 ... ... Checking for negatives ... Negatives rate (per cent) : board=403, channel=16, Nneg=10.780000 Negatives rate (per cent) : board=406, channel=16, Nneg=12.500000 Negatives rate (per cent) : board=406, channel=17, Nneg=12.500000 Negatives rate (per cent) : board=406, channel=18, Nneg=12.500000 Negatives rate (per cent) : board=406, channel=19, Nneg=12. …

  13. Log.dat : example Negatives rate (per cent) : board=413, channel=22, Nneg=12.500000 Negatives rate (per cent) : board=413, channel=23, Nneg=12.500000 ... Checking for small positives ... Small positives rate (per cent) : board=411, channel=5, Nsmall=12.470000 Small positives rate (per cent) : board=411, channel=6, Nsmall=12.500000 Small positives rate (per cent) : board=412, channel=6, Nsmall=11.910000 Small positives rate (per cent) : board=412, channel=7, Nsmall=12.490000 ... Checking for big positives ... Big positives rate (per cent) : board=388, channel=17, Nbig=11.590000 Big positives rate (per cent) : board=388, channel=18, Nbig=10.910000 Big positives rate (per cent) : board=388, channel=24, Nbig=8.970000 Big positives rate (per cent) : board=388, channel=25, Nbig=11.690000 Big positives rate (per cent) : board=388, channel=26, Nbig=11.760000 Big positives rate (per cent) : board=388, channel=27, Nbig=8.280000 Big positives rate (per cent) : board=388, channel=29, Nbig=6.210000 Big positives rate (per cent) : board=389, channel=2, Nbig=11.150000 Big positives rate (per cent) : board=389, channel=3, Nbig=11.510000 Big positives rate (per cent) : board=389, channel=10, Nbig=11.310000 Big positives rate (per cent) : board=389, channel=19, Nbig=11.570000 Big positives rate (per cent) : board=389, channel=20, Nbig=9.520000 Big positives rate (per cent) : board=389, channel=29, Nbig=9.360000 Big positives rate (per cent) : board=390, channel=0, Nbig=8.400000 Big positives rate (per cent) : board=390, channel=1, Nbig=11.050000 Big positives rate (per cent) : board=390, channel=2, Nbig=11.990000 Big positives rate (per cent) : board=390, channel=8, Nbig=5.190000 Big positives rate (per cent) : board=390, channel=11, Nbig=11.710000

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