[Halld-pid] pmt response

[Alexander Ostrovidov]

Beni,

I have looked at the raw data from Run 3079 - i.e., straight from evio files.
I don't have any track selection  - just all the hits which are TDC and ADC
registered at both ends of a module. I also plot ADC Vmax instead of
an integral. Anyway, there are  no obvious double structure in ADC vs 
position plots. as can be seen from the attached picture. In the raw data, 
the PMTs which you have listed, do not look differently from their neighbors 
or from the PMT at the opposite end. I can only concur with you that the 
effect you have found originates due to some software processing or
selection cuts down the line.

Sasha

On Monday, October 12, 2015, Beni Zihlmann wrote:
> Dear TOFers,
> 
> I would like to show you some weird behavior of some of the TOF PMT 
> responses.
> See: https://halldweb.jlab.org/wiki/index.php/TOF_Response
> the last three plots of the page.
> It looks like some of the PMT responses have a double peak. I do not 
> think this is
> real. More likely it is some bug somewhere when the paddle number and 
> end number
> is assigned to the hit. Even more so because it affects the same paddle 
> number and
> end number in both planes.
> 
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