[Halld-cal] Draft of BCAL constants document

[Zisis Papandreou]

Hi Elton:

Sounds good. We'll connect to the regular Calorimeter Bluejeans number.

Cheers, Zisis...

On Dec 11, 2014, at 2:48 PM, Elton Smith <elton at jlab.org> wrote:

> Hi Zisis,
> 
> Ok. I suggest we meet tomorrow afternoon at 2 pm and review the calibration document. 
> 
> Thanks, Elton.
> Elton Smith
> Jefferson Lab MS 12H3
> 12000 Jefferson Ave STE 4
> Newport News, VA 23606
> (757) 269-7625
> (757) 269-6331 fax 
> On 12/11/14 12:41 PM, Zisis Papandreou wrote:
>> 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
>>> 
>>> _______________________________________________
>>> Halld-cal mailing list
>>> Halld-cal at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/halld-cal
>> 
>> 
>> 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
>> 
>> 
>> 
>> 
>> 
> 


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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