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Folks,<br>
<br>
Please find the minutes below and at<br>
<br>
<a class="moz-txt-link-freetext" href="https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_December_2,_2014#Minutes">https://halldweb1.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_December_2,_2014#Minutes</a><br>
<br>
-- Mark<br>
______________________________________________<br>
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GlueX TOF Meeting, December 2, 2014<br>
<div id="bodyContent"><span class="mw-headline" id="Minutes">Minutes</span><br>
<br>
Present:
<br>
<ul>
<li> <b>FSU</b>: Hussein Al Ghoul, Paul Eugenio, Sasha
Ostrovidov, Aristeidis Tsaris
</li>
<li> <b>JLab</b>: Mark Ito (chair), Beni Zihlmann
</li>
<li> <b>NU</b>: Sean Dobbs
</li>
</ul>
<br>
<span class="mw-headline" id="Announcements">Announcements</span><br>
<ul>
<li> Mark encouraged us to start looking at the offline
monitoring histograms for the TOF. They are linked on
the right side of the main wiki page.
</li>
<li> Mark announced that we think we have a solution for
syncing the TOF CAEN TDCs to the other detector timing
systems. Beni made a plot demonstrating perfect
correlation between the time difference between FADC and
TDC time measurements and the TI timestamp. This
correlation can be used to break the 4 ns ambiguity in
the event time origin. Mark will post the plot in the <a
href="https://logbooks.jlab.org/entry/3310913"
class="external text" rel="nofollow">log book</a>.
<ul>
<li> Paul pointed out that we should use the TOF
logbook to communication progress.
</li>
</ul>
</li>
<li> Mark reported that at today's morning run
coordination meeting we started putting together a run
plan. If there is special running needed for the TOF, it
should be communicated soon.
</li>
</ul>
<br>
<span class="mw-headline" id="Calibration_Progress">Calibration
Progress</span><br>
<br>
Sasha has written code to emulation mode 7 data. His code
give distributions agree with the mode 7 data we have taken,
but differ from the results from mode 8 data where an
offline routine was used to derive summary information about
pulses. He is using this new code to proceed with
calibrations.
<br>
With beam data, Sasha is looking at the time offsets of the
x and y plane. He the mean time in both planes and looks at
their difference. He does not see the sharp structure he
expects presently. He also sees inconsistencies between
different "intersection regions" (the 6 x 6 cm regions where
the x and y counters cross). He is using field off, mode 8
data.
<br>
<br>
<span class="mw-headline" id="CCDB_Table_Review">CCDB Table
Review</span><br>
<br>
Beni proposed that we expand the information in the
calibration tables so that channel labeling information
(plane, counter, end) appears explicitly in the tables
rather than their current presentation as a one-dimensional
array of floating point numbers. He will make a proposal to
the group on how we might change things.
<br>
<br>
<span class="mw-headline" id="Low-Level_TOF_Status">Low-Level
TOF Status</span><br>
<br>
Sasha agreed to give the talk next week summarizing the
status of TOF pedestals, rates, etc., at the morning run
coordination meeting.
<br>
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<pre class="moz-signature" cols="72">--
Mark M. Ito, Jefferson Lab, <a class="moz-txt-link-abbreviated" href="mailto:marki@jlab.org">marki@jlab.org</a>, (757)269-5295</pre>
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