[Halld-cal] Draft of BCAL constants document

[Elton Smith]

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 
> <mailto: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 <mailto:zisis at uregina.ca>
> Website: 
> http://www.uregina.ca/science/physics/faculty-staff/faculty/zisis-papandreou.html 
> <http://kronos.phys.uregina.ca/%7Ezisis/professional/>
>
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