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LED events use for noisy channels detection

Try on HCAL LED stability run 24432, 10K events

2SB

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

<p>±10

σp

<l>±10σle

d0 32 bigsmallneg

Store warnings and (problematic/all ?) histograms in log-file

3SB

(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%.

Approximation “zero” constants

4SB

Good channel example

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Warning : <ped> = 1.1 sigma = 2.1

Pedestal warning

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Warning : <ped> = 1.2 sigma = 2.1

Pedestal warning

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Warning : Fit failure

Warning : Fit failure

C-side, wrong settings

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Warning : LED chi2

C-side, wrong settings

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Warning : LED : sigma/<led>

C-side, wrong settings

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X-talk ?

Warning : “small” noise

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X-ta

lk ?

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... Checking Pedestal mean and sigma values ...board=386, channel=31, pedChi2=148, pedMean=1.030888, pedSigma=2.185785board=399, channel=24, pedChi2=163, pedMean=1.204062, pedSigma=2.036628board=411, channel=28, pedChi2=1037

... Checking Led sigma/mean values ...Problem LED chi2 : board=388, channel=24, LedChi2=1100Problem LED chi2 : board=388, channel=26, LedChi2=1166Problem 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=10.780000Negatives rate (per cent) : board=406, channel=16, Nneg=12.500000Negatives rate (per cent) : board=406, channel=17, Nneg=12.500000Negatives rate (per cent) : board=406, channel=18, Nneg=12.500000Negatives rate (per cent) : board=406, channel=19, Nneg=12.…

Log.dat : example

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Log.dat : example

Negatives rate (per cent) : board=413, channel=22, Nneg=12.500000Negatives rate (per cent) : board=413, channel=23, Nneg=12.500000

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

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