<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Folks,<br>
<br>
Find the minutes below and at<br>
<br>
<a class="moz-txt-link-freetext" href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_July_28,_2015">https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_July_28,_2015</a><br>
<br>
-- Mark<br>
___________________________________________________<br>
<br>
<div id="globalWrapper">
<div id="column-content">
<div id="content" class="mw-body" role="main"> <br>
<span dir="auto">GlueX TOF Meeting, July 28, 2015</span><span
class="mw-headline" id="Minutes">, Minutes</span><br>
<div id="bodyContent" class="mw-body-content">
<div id="mw-content-text" dir="ltr" class="mw-content-ltr"
lang="en">
<br>
Present:
<br>
<ul>
<li> <b>FSU</b>: Hussein Al Ghoul, Paul Eugenio, Sasha
Ostrovidov, Aristeidis Tsaris</li>
<li> <b>JLab</b>: Brad Cannon, Mark Ito (chair), Beni
Zihlmann</li>
</ul>
<br>
<span class="mw-headline"
id="Review_of_minutes_from_July_14">Review of minutes
from July 14</span><br>
<br>
We looked at the <a
href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_July_14,_2015#Minutes"
title="GlueX TOF Meeting, July 14, 2015">minutes</a>.
<br>
<br>
No movement on the CAEN TDC bin calibration yet. Beni will
talk to Sergey Furletov about installing Bryan Moffit
library into the online system.
<br>
<br>
<span class="mw-headline" id="Calibration_Status_FSU">Calibration
Status FSU</span><br>
<ol>
<li> Sasha trying to use reflections to get at time-walk
corrections. He tried looking at pulses with two
samples, but usually there are not TDC hits for the
small reflections.</li>
<li> Tried taking cosmic data, but the IOC's were down;
he could not turn on the HV. Beni told us you have to
re-start the IOC's from the near-top-level GUI. He
will have a look at the system after the meeting.</li>
<li> There was trouble starting the DAQ from gluon47.
None of the windows came up. We suggested that Sasha
consult with Sergey Furletov before attempting to
start up the DAQ remotely. There may be conditions in
the Hall that prevent doing so.
<br>
</li>
</ol>
<br>
<span class="mw-headline" id="Calibration_Status_JLab">Calibration
Status JLab</span><br>
<br>
Beni led us through <a
href="https://halldweb.jlab.org/wiki/index.php/TOF_Light_Attenuation"
title="TOF Light Attenuation">his wiki page</a> on light
attenuation measurements from data. Please see the page
for details and figures. In contrast to previous work, he
tried fitting to a single exponential to facilitate
comparison with the FSU bench results which also used a
single exponential. He finds a mean attenuation length of
225 cm with an RMS spread of about 20 cm. This does not
agree very well with the FSU results.
<br>
<br>
Sasha pointed out that the FSU measurements were made with
a UV laser and were done with un-wrapped scintillator.
Meaningful comparison may be difficult.
<br>
<br>
<span class="mw-headline" id="Calibration_Training">Calibration
Training</span><br>
<br>
Beni met with Brad yesterday. Brad will be at the lab for
the next two weeks. They succeeded in building Beni's code
in Brad's account and running the jobs on run 3180. Brad
is going through the code now to understand the system.
<br>
<br>
He will subscribe to the PID and Calibration mailing lists
and will attend the calibration meetings as well.
<br>
<br>
</div>
<div class="printfooter">
Retrieved from "<a dir="ltr"
href="https://halldweb.jlab.org/wiki/index.php?title=GlueX_TOF_Meeting,_July_28,_2015&oldid=68917">https://halldweb.jlab.org/wiki/index.php?title=GlueX_TOF_Meeting,_July_28,_2015</a>"</div>
</div>
</div>
</div>
</div>
<br>
</body>
</html>