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The following plots show the evolution with time of the pedestal deviation for LEX1,HEX1,LEX8 and HEX8 .I use the root file CALPEDSANALYZER and canvas CalXAdcPedPedMeanDeviation_LEX1_TH1 ( LEX1,HEX1,LEX8 and HEX8).
I put the data into a histogram and fit with a Gaussian (see plot). The reported value is the mean of the gaussian (with 3 parameters, N ,mu, sigma) ( with which give the peak of the distribution) and the errors error bar is the width of the Gaussian sigma
the time range is more or less 30 days
we see a clear trend that could explain the trend is FLE and FHE threshold.
h2 updated plots (10/04/2008)
FLE threshold
FHE threshold
LAC pos threshold
LAC neg threshold
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