[Halld-cal] [New Logentry] BCAL pedestals monitored overnight

[Chris Cuevas]

Interesting.

The readout crates each have 6 temperature probes available and I wonder 
if the slow 3 hour wiggle correlates to the hall temperature 
fluctuation.  I saw the other BCAL mail regarding the voltage and 
temperature stability, but the time scale was not close to 22 hours.

-Chris
~~~~~~~~~~~~~~~~~~~
On 5/6/2014 12:20 PM, dalton at jlab.org wrote:
>
>
>   BCAL pedestals monitored overnight
>   <https://logbooks.jlab.org/entry/3285334>
>
> Lognumber 3285334 <https://logbooks.jlab.org/entry/3285334>. Submitted 
> by dalton <https://logbooks.jlab.org/user/dalton> on Tue, 05/06/2014 - 
> 12:15.
>
> Logbooks: 	HDBCAL <https://logbooks.jlab.org/book/hdbcal> HDLOG 
> <https://logbooks.jlab.org/book/hdlog>
> Tags: 	Detector <https://logbooks.jlab.org/tag/detector>
> Entry Makers: 	dalton
>
> A pedestal run was taken overnight to monitor the BCAL pedestals. The 
> data was taken at a rate of 0.756 Hz for a total of 22 hours leading 
> to ~60000 events. The plots show the pedestals as a function of event 
> from about 1:20 pm on 5 May. Each page is for the 16 channels on a 
> single ADC. They were chose beecause they contained a channel with a 
> notable feature but on the whole this is a representative sample. 
> There is a clear wiggle with a period of 3 hours and a couple minutes 
> until about 4 am when the behavior flattens out and becomes less 
> regular. At the most severe, the excursion is more than 6 channels 
> peak-to-peak although there are also a few channels with negligible 
> drift. There is in addition, 1 channel which appears to have a 
> discontiuity in it.
>
>
>
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