<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hi Elton:<div><br></div><div>Sounds good. We'll connect to the regular Calorimeter Bluejeans number.<div><br></div><div>Cheers, Zisis...<br><div><br><div><div>On Dec 11, 2014, at 2:48 PM, Elton Smith <<a href="mailto:elton@jlab.org">elton@jlab.org</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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<div class="moz-cite-prefix">Hi Zisis,<br>
<br>
Ok. I suggest we meet tomorrow afternoon at 2 pm and review the
calibration document. <br>
<br>
Thanks, Elton.<br>
<pre class="moz-signature" cols="72">Elton Smith
Jefferson Lab MS 12H3
12000 Jefferson Ave STE 4
Newport News, VA 23606
(757) 269-7625
(757) 269-6331 fax </pre>
On 12/11/14 12:41 PM, Zisis Papandreou wrote:<br>
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Hi Elton:
<div><br>
</div>
<div>I am available on Friday only between 2-4pm EST. Monday is
wide open though.</div>
<div><br>
</div>
<div>Cheers, Zisis...</div>
<div><br>
<div>
<div>On Dec 10, 2014, at 1:39 PM, Elton Smith <<a moz-do-not-send="true" href="mailto:elton@jlab.org">elton@jlab.org</a>>
wrote:</div>
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<blockquote type="cite">Dear colleagues,<br>
<br>
I have uploaded a draft document (GlueX-doc-2618) with
definitions for <br>
the low-level calibration constants for the BCAL. This is a
document for <br>
discussion and feedback is welcome. The goal, after we have
hashed it <br>
out, is to have precise definitions of all constants that
are placed in <br>
the calibrations data base. In particular, it is necessary
to choose <br>
some conventions, which need to be clear to avoid errors in
<br>
reconstruction. We need to agree on what those conventions
are. We <br>
should also make sure that there are no factors of 2
missing.<br>
<br>
The document proposes that the gains be specified at the
center of the <br>
module. If I understand correctly, this is different than
Andrei's <br>
convention that uses the end of the module.<br>
Therefore, there is a factor of e^{-L/2*lambda} between the
two that <br>
needs to be sorted out. There may also be other definitions
or <br>
conventions that need consensus.<br>
<br>
We should probably find a dedicated time to go over this. As
we are in <br>
the process of entering constants into db now, I would hope
to have a <br>
discussion soon. Is Friday a possibility?<br>
<br>
Thanks, Elton.<br>
<br>
<br>
-- <br>
Elton Smith<br>
Jefferson Lab MS 12H3<br>
12000 Jefferson Ave STE 4<br>
Newport News, VA 23606<br>
(757) 269-7625<br>
(757) 269-6331 fax<br>
<br>
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