[Halld-cal] Calorimetry Meeting Minutes 2015-01-29

[Elton Smith]

Hi Tegan,

Thanks for generating all the pedestal plots. They are very nice and 
cover each channel individually. The next step is to summarize the 
information into a a couple of summary plots. For example, it would be 
good to plot the means of all the channels in one histogram to see the 
total width distribution. This gives an upper bound on the variation of 
pedestal drifts throughout the entire run period. One can also plot the 
rms for all channels. This allows one to quickly see how many outliers 
there are in either distribution.

It would also be good to remove the mean values of each channel from the 
histogram. That is, let m^j_i be the mean of channel j for run i. Then 
the mean for the entire run period for channel j, mbar^j, would be 
sum(j<N) m^j_i / N, where N is the number of runs used for pedestal 
determination. Then histogram m^j_i - mbar^j. This shows the deviation 
of each channel from its own mean.

Thanks, Elton.

Elton Smith
Jefferson Lab MS 12H3
12000 Jefferson Ave STE 4
Newport News, VA 23606
(757) 269-7625
(757) 269-6331 fax

On 1/30/15 12:45 PM, Zisis Papandreou wrote:
> Hello everyone:
>
> yesterday's minutes are now available: 
> https://halldweb1.jlab.org/wiki/index.php/Jan_29,_2015_Calorimetry
>
> Please correct/add as you see fit.
>
> Best regards, Zisis...
>
> Dr. Zisis Papandreou
> Professor of Physics, Ph.D., P.Phys.
> ---------------------------------------------------------
> Department of Physics
> University of Regina
> 3737 Wascana Parkway
> Regina, SK  S4S 0A2 CANADA
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> <http://kronos.phys.uregina.ca/%7Ezisis/professional/>
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