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<p>Folks,</p>
<p>Please find the minutes <a moz-do-not-send="true" href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_December_1,_2021#Minutes">here</a>
and below.</p>
<p> -- Mark</p>
<p> _______________________________</p>
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<h2><span class="mw-headline" id="Minutes">Minutes of the</span><span dir="auto"> GlueX TOF Meeting, December 1, 2021</span></h2>
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<p>Present: Mark Ito (chair), Sasha Ostrovidov, Simon
Taylor, Beni Zihlmann
</p>
<p>There is a <a rel="nofollow" class="external text" href="https://bluejeans.com/s/m1YZWUec@zf">recording
of this meeting</a>. Log into the <a rel="nofollow" class="external text" href="https://jlab.bluejeans.com">BlueJeans site</a>
first to gain access (use your JLab credentials).
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<h3><span class="mw-headline" id="Review_of_minutes_from_the_last_meeting">Review of
minutes from the last meeting</span></h3>
<p>We sent over the <a href="https://halldweb.jlab.org/wiki/index.php/GlueX_TOF_Meeting,_November_3,_2021#Minutes" title="GlueX TOF Meeting, November 3, 2021">minutes
from the meeting on November 3rd</a>.
</p>
<h4><span class="mw-headline" id="Occupancy_Plots">Occupancy
Plots</span></h4>
<p>Beni noted that in the occupancy plots shown last time,
the set with the magnetic field on is noticeably
narrower that the one with field off. This is
understandable due to the focusing of the solenoidal
field. The asymmetry observed with the field on is still
a mystery though.
</p>
<h4><span class="mw-headline" id="Calibration">Calibration</span></h4>
<p>Beni has been steadily working on TOF calibrations
throughout the PrimEx run and continuing on into the SRC
run. He has submitted constants for the PrimEx data to
the CCDB. Also he is keeping up with the calibration
jobs for SRC, processing every fifth run.
</p>
<h4><span class="mw-headline" id="TOF_II_Trigger">TOF II
Trigger</span></h4>
<p>There will be a test of the TOF II trigger on the last
day of the now-extended SRC run. Ilya Larin, Sascha
Somov, and Mark will be here to conduct it. Hai Dong
responded to an email thread that he has performed tests
on the new firmware and it is ready to go as far as he
is concerned.
</p>
<h4><span class="mw-headline" id="Beam_Angle_Measurement_during_SRC">Beam Angle
Measurement during SRC</span></h4>
<p>Beni has obtained results for the measurement with the
carbon targets. Simon is working on a measurement as
well. Beni sees a positive slope in the projection of
the beam on the x-z plane and a negative slope for y-z.
The effect is about 2 mR for each, but depends on cuts
applied to χ<sup>2</sup> and the z-position of the
target peaks. These variations are probably due to
statistics.
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