[Halld-cal] Draft of BCAL constants document

[Elton Smith]

Hi all,

Local JLab: I have booked L207 for both the BCAL reconstruction (11:15) 
meeting and the BCAL calibration constants meeting (2 pm),

I have updated the version of the document on DocDB, mainly correcting 
typos and adding clarifying information and indeed continue to update it 
as I get feedback. If you have any corrections/feedback that do not 
require discussion send them to me and I can update the document 
offline. Before the meeting you may wish to check out the latest version 
for discussion.

Andrei: In order to use your calibration constants correctly, we need to 
know what attenuation length you used to determine the "attenuated 
energy". Could you please send the value.

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 3:48 PM, Elton Smith 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 
>> <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
>>>
>>> _______________________________________________
>>> Halld-cal mailing list
>>> Halld-cal at jlab.org <mailto: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 <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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