[Halld-cal] Draft of BCAL constants document

[Zisis Papandreou]

Hi Elton:

I am available on Friday only between 2-4pm EST.    Monday is wide open though.

Cheers, Zisis...

On Dec 10, 2014, at 1:39 PM, Elton Smith <elton at jlab.org> wrote:

> Dear colleagues,
> 
> I have uploaded a draft document (GlueX-doc-2618) with definitions for 
> the low-level calibration constants for the BCAL. This is a document for 
> discussion and feedback is welcome. The goal, after we have hashed it 
> out, is to have precise definitions of all constants that are placed in 
> the calibrations data base. In particular, it is necessary to choose 
> some conventions, which need to be clear to avoid errors in 
> reconstruction. We need to agree on what those conventions are. We 
> should also make sure that there are no factors of 2 missing.
> 
> The document proposes that the gains be specified at the center of the 
> module.  If I understand correctly, this is different than Andrei's 
> convention that uses the end of the module.
> Therefore, there is a factor of e^{-L/2*lambda} between the two that 
> needs to be sorted out. There may also be other definitions or 
> conventions that need consensus.
> 
> We should probably find a dedicated time to go over this. As we are in 
> the process of entering constants into db now, I would hope to have a 
> discussion soon. Is Friday a possibility?
> 
> Thanks, Elton.
> 
> 
> -- 
> Elton Smith
> Jefferson Lab MS 12H3
> 12000 Jefferson Ave STE 4
> Newport News, VA 23606
> (757) 269-7625
> (757) 269-6331 fax
> 
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Dr. Zisis Papandreou
Professor of Physics, Ph.D., P.Phys.
---------------------------------------------------------
Department of Physics   
University of Regina	    
3737 Wascana Parkway
Regina, SK  S4S 0A2	 CANADA

Phone: (306) 585-5379
Fax: (306) 585-5659
Email:  zisis at uregina.ca
Website: http://www.uregina.ca/science/physics/faculty-staff/faculty/zisis-papandreou.html





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