[Halld-cal] Independent Pulser signals to the FCAL

[leckey at jlab.org]

I agree, I can not see where it would be useful.  Also, with the edges
painted plack, little if any of the light should escape from one plane to
another.

John


>
> Elton,
>
> I can't think of any particular advantage this provides.  We can read out
> only part of the detector at a time, if desired, by only turning on HV to
> a subset of the PMTs.
>
> The only thing I can imagine doing with such a configuration is
> determining, for those cells near the boundary, how much light comes from
> one pane versus another.  Note that the boundary between panes is arranged
> to be on a cell boundary, so there should not be much light from multiple
> panes making it into I single block.
>
> I can't come up with a instance where one would want to know this.
>
> Matt
>
> ---------------------------------------------------------------------
> Matthew Shepherd, Associate Professor
> Department of Physics, Indiana University, Swain West 265
> 727 East Third Street, Bloomington, IN 47405
>
> Office Phone:  +1 812 856 5808
>
> On Nov 19, 2013, at 3:34 PM, Elton Smith <elton at jlab.org> wrote:
>
>> Hi Matt and John,
>>
>> We are about to populate the transition board for the FCAL monitoring
>> system. The plan was to have a single board, which would send each
>> trigger signal to all four quadrants at the same time. It turns out that
>> if we use four boards (we have extras) and populate in a limited way, we
>> could pulse different quadrants separately. This is a little more
>> complicated, but I would like your views on whether it is worth the
>> extra flexibility.
>>
>> Thanks, Elton.
>>
>> --
>> Elton Smith
>> Jefferson Lab MS 12H5
>> 12000 Jefferson Ave STE 16
>> Newport News, VA 23606
>> (757) 269-7625
>> (757) 269-6331 fax
>>
>
>