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</style><article id="node-444642" 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/3371837" rel="bookmark">BCAL TS FP LED and physics triggers</a>
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<p class="author-datetime">
Lognumber <a href="https://logbooks.jlab.org/entry/3371837" class="lognumber" data-lognumber="3371837">3371837</a>. Submitted by <a href="https://logbooks.jlab.org/user/somov">somov</a> on <time datetime="2016-01-21T19:47:47-0500" pubdate="pubdate">Thu, 01/21/2016 - 19:47</time>. </p>
<table class="field-vitals"><tr><th>Logbooks: </th><td><a href="https://logbooks.jlab.org/book/hdbcal">HDBCAL</a> <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>2 usec delay was added (by Ben) to the trigger output of CAEN1495 boards, which allows one to run the TS FP LED triggers with the slowest GlueX physics trigger.<br />
NIM output connections were changed on the caen boards for the upstream and downstream LEDs: NIM 1 -> NIM 7, NIM 3 -> NIM 7, respectively.</p>
<p>Run 4692 (readout BCAL only): an example of the run with the cosmic trigger (E_BCAL > 10000) and<br />
two LED (upstream/downstream) triggers distributed through the TS FP.</p>
<p>Triggers can be identified in the reconstruction using "trig_mask" and "fp_trig_mask" bit-patterns in the DL1Trigger bank.<br />
fp_trig_mask & 0x100 - upstream LED<br />
fp_trig_mask & 0x200 - downstream LED<br />
trig_mask & 0x1 - cosmic trigger</p>
<p>Note, when the TS FP LED trigger(s) fires, the corresponding GTP trigger (induced by the LED) is inhibited.</p>
<p>An example of the configuration file is in the official place: </p>
<p>hd_bcal/bcal_phys_led.conf</p>
<p>Final tuning of delays will be needed during commissioning of the global GlueX trigger.</p>
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