Hi Matt,
There is rate-dependent effect that is significant for channels close to the beamline:
https://mailman.jlab.org/pipermail/hps-ecal/2015-January/000113.html
I've not measured how quickly it changes, but the easiest way to deal with it is probably
going to be mode-7 pedestals.
-Nathan
On Jan 11, 2015, at 8:05 PM, "Graham, Mathew Thomas" <[log in to unmask]> wrote:
> Hi Nathan,
>
> Do you have an idea of how much & how quickly does the pedestal change?
>
> On Jan 11, 2015, at 4:59 PM, Nathan Baltzell <[log in to unmask]> wrote:
>
>> Hi Everyone,
>>
>> I wrote a preliminary running pedestal average for mode-7 data. For the moment I just added it
>> to EcalRawConverter for testing in my local build because that's where the pedestal subtraction
>> is done and I saw direct access to the raw data, but maybe it should go somewhere else. For
>> example, we want to be able to plot the time-dependence of this running pedestal in the
>> monitoring-app too. And maybe also persisted in LCIO? From a design standpoint, should it
>> instead be in the ecal-conditions class (although that looks like all static stuff from the db now),
>> or its own new class, or else? I'm still getting familiar with this framework ….
>>
>> -Nathan
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