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</style><article id="node-440253" class="node node-logentry article ia-n clearfix" role="article"><header class="node-header"><h1 class="node-title">
<a href="https://logbooks.jlab.org/entry/3367450" rel="bookmark">PS trigger studies</a>
</h1>
</header><div class="date-vitals">
<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/3367450" class="lognumber" data-lognumber="3367450">3367450</a>. Submitted by <a href="https://logbooks.jlab.org/user/somov">somov</a> on <time datetime="2015-12-15T03:55:21-0500" pubdate="pubdate">Tue, 12/15/2015 - 03:55</time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hdlog">HDLOG</a> <a href="https://logbooks.jlab.org/book/hdtrigger">HDTRIGGER</a></td></tr><tr><th>Entry Makers: </th><td>somov</td></tr></table></div>
<div class="logentry node-content">
<p>The PS trigger was set up and operated relatively<br />
well during the evening/night shift. We collected<br />
several million events at a relatively small<br />
trigger rate of 600 Hz for the TAGM/TAGH and PS<br />
calibration and efficiency studies (we have a problem<br />
presumably with a fadc, which caused a DMA readout<br />
error at high rate - to be checked during<br />
access to the Hall). Most data were taken in<br />
the readout mode 7.</p>
<p>Production run was set for the night shift with the PS, TAGH/TAGM and TRD</p>
<p>Run conditions:<br />
PS converter 10^-3, radiator 2x10-5 - 10^-4,<br />
very stable runnning conditions.<br />
GTP trigger rate - 2 kHz (600 Hz accepted rate)</p>
<p>run 4167<br />
--------<br />
PS and PSC only, rate 300 Hz, 2x10^-5 radiator<br />
260 k events</p>
<p>run 4168<br />
--------<br />
the same conditions, ~700 k events</p>
<p>TAGH HV scan done with Nathan</p>
<p>run 4172<br />
--------<br />
TAGH voltage -100 V</p>
<p>630k events</p>
<p>run 4173<br />
--------<br />
TAGH voltahe -50 V</p>
<p>Change TAGM fadc readout threshold from 30 to 20<br />
Change TAGH readout threshold from 200 to 70</p>
<p>500 k events</p>
<p>run 4174<br />
---------<br />
TAGH voltage - 150 V<br />
570 k events</p>
<p>run 4175<br />
--------<br />
TAGH voltage +50 V<br />
650 k events</p>
<p>run 4177<br />
--------<br />
TAGH voltage +100 V<br />
Change TAGH readout voltage to 200<br />
300 k events</p>
<p>run 4178<br />
--------<br />
TAGH voltage +150 V<br />
430 k events</p>
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