[Halld-cal] fall beam tests

[Elton Smith]

Hi Zisis,

I have added your comments to the wiki page to start guiding discussion.

Thanks, Elton.

Elton Smith
Jefferson Lab MS 12H5
12000 Jefferson Ave
Suite #16
Newport News, VA 23606
(757) 269-7625
(757) 269-6331 fax


On 8/4/11 12:25 PM, Zisis Papandreou wrote:
> Hello Matt&  Elton&  everyone else:
>
> we have had several discussions during our video conference meetings on the beam tests that we hope to carry out in the fall.  Most of the work until now has been done by IU, in scoping out the tagger area and planning for the FCAL tests.  I wanted to get the ball rolling on the BCAL side as well.
>
> 1. I propose that we start a Wiki area for the tests.  As a matter of history, the Sept 2006 BCAL beam tests in Hall B were the first heavy use of the newly born JLab Wiki (April/May 2006).  I found the mini-site there very useful in terms of putting plans, hardware, software, and calculations.  I took the liberty to establish a placeholder:
> http://www.jlab.org/Hall-D/software/wiki/index.php/GlueX_BeamTests (and it is linked off the main page for easy access).
>
> 2. The main objectives of the BCAL beam test would be:
> - test the SiPMs with light guides, and in all their readout, mechanical and cooling glory in a beam environment, with Flash ADCs and the JLab DAQ system.  The goal here is to see how everything behaves, work out kinks, the usual.  A very short, but otherwise full thickness and width, BCAL mini module should be used.  Maybe 20-30cm long, to fit in the tight space next to the FCAL setup and to be 'light enough' to handle by hand, just long enough to extract time difference from the ends.
> - use the data to learn/validate the MC and help us further our reconstruction effort.
>
> Questions: (just a few of the many here)
> - how many SiPM layers (I understand that we will have more than enough units by August/Sept to fully instrument a module, ie 80 units)?  That would depend on the beam energy (instrumenting from the inner towards the outer), preamp number,&  mech/cooling system, as well as electronics channels in an ADC.  Instrumenting 4-6 inner layers on both sides should be a goal in my opinion, so as to contain most of the shower (depends logarithmically on beam energy).
> - Can we get all parts in place by November? (mechanical, preamp boards, cooling, and Chile light guides)?
> - I assume DAQ will be ready since we will use it for FCAL.  Which trigger to accommodate both setups? Etc Etc.
>
> We should deal with this topic next Tuesday so that we can get going.  If we proceed, we can build such a mini module, but we need some notice, and of course everyone else needs time to get the parts together.  If the answer is yes, then we can write a paragraph for the one-page Executive Summary that Eugene needs for Volker.
>
> Cheers, Zisis...
>
> ---
> Prof. Zisis Papandreou, Ph.D., P.Phys.
> Department of Physics   |  tel.: 	(306) 585-5379
> University of Regina	    |  fax.: 	(306) 585-5659
> Regina, SK  S4S 0A2	    |  email:  zisis at uregina.ca
> Web:  http://web.me.com/zisis/professional/
>
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