<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Hi All,<div><br></div><div> Last Thursday we held an organizational meeting for the L3 trigger. Minutes of the meeting are</div><div>at the following link and copied below. For those who are interested, we will be meeting regularly,</div><div>every other Friday at 11:00am (JLab time) opposite the DIRC meetings. Next meeting is this</div><div>Friday. I’m sending this out to the general <a href="mailto:halld@jlab.org">halld@jlab.org</a> mailing list this time just to let people know</div><div>about it. Future announcements will be made only on the <a href="mailto:halld-trigger@jlab.org">halld-trigger@jlab.org</a> mailing list.</div><div><br></div><div><a href="https://halldweb.jlab.org/wiki/index.php/GlueX_Level-3_Trigger_Meeting,_May_19,_2016">https://halldweb.jlab.org/wiki/index.php/GlueX_Level-3_Trigger_Meeting,_May_19,_2016</a></div><div><br></div><div>Regards,</div><div>-David</div><div><br></div><div><h1 style="font-weight: normal; margin: 0px 0px 0.6em; overflow: hidden; padding-top: 0.5em; padding-bottom: 0.17em; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(170, 170, 170); font-size: 23.876px; font-family: sans-serif; line-height: 19.05px; widows: 1; background-image: none; background-color: rgb(255, 255, 255); background-position: initial initial; background-repeat: initial initial;"><span class="mw-headline" id="Minutes">Minutes</span><span class="mw-editsection" style="-webkit-user-select: none; font-size: small; margin-left: 1em; vertical-align: baseline; line-height: 1em; display: inline-block;"><span class="mw-editsection-bracket">[</span><a href="https://halldweb.jlab.org/wiki/index.php?title=GlueX_Level-3_Trigger_Meeting,_May_19,_2016&action=edit§ion=5" title="Edit section: Minutes" style="text-decoration: none; color: rgb(90, 54, 150); background: none;">edit</a><span class="mw-editsection-bracket">]</span></span></h1><div style="margin: 0.4em 0px 0.5em; line-height: 19.05px; font-family: sans-serif; font-size: 12.7px; widows: 1; background-color: rgb(255, 255, 255);">Attendees: David L., Adesh S., Justin S., Mike W., Cristiano F.</div><h2 style="font-weight: normal; margin: 0px 0px 0.6em; overflow: hidden; padding-top: 0.5em; padding-bottom: 0.17em; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(170, 170, 170); font-size: 19.05px; font-family: sans-serif; line-height: 19.05px; widows: 1; background-image: none; background-color: rgb(255, 255, 255); background-position: initial initial; background-repeat: initial initial;"><span class="mw-headline" id="Schedule">Schedule</span><span class="mw-editsection" style="-webkit-user-select: none; font-size: small; margin-left: 1em; vertical-align: baseline; line-height: 1em; display: inline-block;"><span class="mw-editsection-bracket">[</span><a href="https://halldweb.jlab.org/wiki/index.php?title=GlueX_Level-3_Trigger_Meeting,_May_19,_2016&action=edit§ion=6" title="Edit section: Schedule" style="text-decoration: none; color: rgb(90, 54, 150); background: none;">edit</a><span class="mw-editsection-bracket">]</span></span></h2><ul style="line-height: 19.05px; list-style-type: square; margin: 0.3em 0px 0px 1.6em; padding: 0px; list-style-image: url(data:image/gif;base64,R0lGODlhBQANAIAAAGOMnP///yH5BAEAAAEALAAAAAAFAA0AAAIJjI+pu+APo4SpADs=); font-family: sans-serif; font-size: 12.7px; widows: 1; background-color: rgb(255, 255, 255);"><li style="margin-bottom: 0.1em;">L3 is not a requirement for the Fall 2016 and Spring 2017 runs. We will schedule some commissioning time during these runs</li><li style="margin-bottom: 0.1em;">Current schedule has no Hall-D running in Fall 2017</li><li style="margin-bottom: 0.1em;">Expect to have fully deployed L3 system in use for Fall 2018 run</li></ul><h2 style="font-weight: normal; margin: 0px 0px 0.6em; overflow: hidden; padding-top: 0.5em; padding-bottom: 0.17em; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(170, 170, 170); font-size: 19.05px; font-family: sans-serif; line-height: 19.05px; widows: 1; background-image: none; background-color: rgb(255, 255, 255); background-position: initial initial; background-repeat: initial initial;"><span class="mw-headline" id="Discussion">Discussion</span><span class="mw-editsection" style="-webkit-user-select: none; font-size: small; margin-left: 1em; vertical-align: baseline; line-height: 1em; display: inline-block;"><span class="mw-editsection-bracket">[</span><a href="https://halldweb.jlab.org/wiki/index.php?title=GlueX_Level-3_Trigger_Meeting,_May_19,_2016&action=edit§ion=7" title="Edit section: Discussion" style="text-decoration: none; color: rgb(90, 54, 150); background: none;">edit</a><span class="mw-editsection-bracket">]</span></span></h2><ul style="line-height: 19.05px; list-style-type: square; margin: 0.3em 0px 0px 1.6em; padding: 0px; list-style-image: url(data:image/gif;base64,R0lGODlhBQANAIAAAGOMnP///yH5BAEAAAEALAAAAAAFAA0AAAIJjI+pu+APo4SpADs=); font-family: sans-serif; font-size: 12.7px; widows: 1; background-color: rgb(255, 255, 255);"><li style="margin-bottom: 0.1em;">Primary goal of L3 is to reduce/eliminate events with E<sub style="line-height: 1;">γ</sub> < 7GeV</li><li style="margin-bottom: 0.1em;">Justin briefly reviewed his slides from Oct. 2014 GlueX collaboration meeting to remind us what has been done and where we left it</li><li style="margin-bottom: 0.1em;">Plan is to implement MVA (=multivariate analysis) with focus on BDT<ul style="line-height: 1.5em; list-style-type: square; margin: 0.3em 0px 0px 1.6em; padding: 0px; list-style-image: url("data:image/gif;base64,R0lGODlhBQANAIAAAGOMnP///yH5BAEAAAEALAAAAAAFAA0AAAIJjI+pu+APo4SpADs=");"><li style="margin-bottom: 0.1em;">We will start with the <a rel="nofollow" class="external text" href="http://tmva.sourceforge.net/" style="text-decoration: none; color: rgb(102, 51, 102); padding-right: 15px; background: linear-gradient(transparent, transparent) 100% 50% no-repeat, url("data:image/svg+xml;base64,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") 100% 50%;">TMVA</a> package that is integrated into <a rel="nofollow" class="external text" href="https://root.cern.ch/" style="text-decoration: none; color: rgb(102, 51, 102); padding-right: 15px; background: linear-gradient(transparent, transparent) 100% 50% no-repeat, url("data:image/svg+xml;base64,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") 100% 50%;">ROOT</a></li><li style="margin-bottom: 0.1em;">May eventually move to <a rel="nofollow" class="external text" href="http://arxiv.org/abs/1210.6861" style="text-decoration: none; color: rgb(102, 51, 102); padding-right: 15px; background: linear-gradient(transparent, transparent) 100% 50% no-repeat, url("data:image/svg+xml;base64,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") 100% 50%;">other algorithms</a> developed specifically for this type of triggering</li></ul></li><li style="margin-bottom: 0.1em;">Two approaches:<ol style="line-height: 1.5em; margin: 0.3em 0px 0px 3.2em; padding: 0px; list-style-image: none;"><li style="margin-bottom: 0.1em;">Detailed Monte Carlo where all truth information is available</li><li style="margin-bottom: 0.1em;">Real data from Spring 2016 run where events can be flagged as "reconstructable"</li></ol><ul style="line-height: 1.5em; list-style-type: square; margin: 0.3em 0px 0px 1.6em; padding: 0px; list-style-image: url("data:image/gif;base64,R0lGODlhBQANAIAAAGOMnP///yH5BAEAAAEALAAAAAAFAA0AAAIJjI+pu+APo4SpADs=");"><li style="margin-bottom: 0.1em;">Both will be pursued. Simulation will necessarily need to improve to meet physics goals of GlueX and L3 will benefit from that</li></ul></li><li style="margin-bottom: 0.1em;">Simulated data set being generated for GlueX ("sim1") will not be sufficient for L3 study since it has a lower bound of E<sub style="line-height: 1;">γ</sub> = 4GeV. We will need to generate another with energies down to π threshold<ul style="line-height: 1.5em; list-style-type: square; margin: 0.3em 0px 0px 1.6em; padding: 0px; list-style-image: url("data:image/gif;base64,R0lGODlhBQANAIAAAGOMnP///yH5BAEAAAEALAAAAAAFAA0AAAIJjI+pu+APo4SpADs=");"><li style="margin-bottom: 0.1em;">L3 simulated data set will match the conditions of the "first priority" data as determined by Analysis Working Group. Specifically, runs 11347-11555 (see <a rel="nofollow" class="external text" href="https://halldweb.jlab.org/wiki-private/index.php/Spring_2016_Dataset_Summary" style="text-decoration: none; color: rgb(102, 51, 102); padding-right: 15px; background: linear-gradient(transparent, transparent) 100% 50% no-repeat, url("data:image/svg+xml;base64,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") 100% 50%;">here for details</a>)</li><li style="margin-bottom: 0.1em;">Adesh will put together wiki page with simulation specifications and status</li></ul></li><li style="margin-bottom: 0.1em;">Mike noted that another important piece of information will be the CPU cost of various algorithms that may be used as input to the BDT<ul style="line-height: 1.5em; list-style-type: square; margin: 0.3em 0px 0px 1.6em; padding: 0px; list-style-image: url("data:image/gif;base64,R0lGODlhBQANAIAAAGOMnP///yH5BAEAAAEALAAAAAAFAA0AAAIJjI+pu+APo4SpADs=");"><li style="margin-bottom: 0.1em;">Cristiano will start looking at this and documenting it.</li><li style="margin-bottom: 0.1em;">This may prompt some optimizations of code where L3 would benefit so the benchmarking tools developed are expected to be reused multiple times</li><li style="margin-bottom: 0.1em;">Some preliminary work in this area was <a rel="nofollow" class="external text" href="http://argus.phys.uregina.ca/gluex/DocDB/0030/003004/001/20160509_lawrence_online.pdf" style="text-decoration: none; color: rgb(102, 51, 102); padding-right: 15px; background: linear-gradient(transparent, transparent) 100% 50% no-repeat, url("data:image/svg+xml;base64,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") 100% 50%;">shown at the May Collab. Meeting</a></li></ul></li></ul><h2 style="font-weight: normal; margin: 0px 0px 0.6em; overflow: hidden; padding-top: 0.5em; padding-bottom: 0.17em; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(170, 170, 170); font-size: 19.05px; font-family: sans-serif; line-height: 19.05px; widows: 1; background-image: none; background-color: rgb(255, 255, 255); background-position: initial initial; background-repeat: initial initial;"><span class="mw-headline" id="Future_Meetings">Future Meetings</span><span class="mw-editsection" style="-webkit-user-select: none; font-size: small; margin-left: 1em; vertical-align: baseline; line-height: 1em; display: inline-block;"><span class="mw-editsection-bracket">[</span><a href="https://halldweb.jlab.org/wiki/index.php?title=GlueX_Level-3_Trigger_Meeting,_May_19,_2016&action=edit§ion=8" title="Edit section: Future Meetings" style="text-decoration: none; color: rgb(90, 54, 150); background: none;">edit</a><span class="mw-editsection-bracket">]</span></span></h2><ul style="line-height: 19.05px; list-style-type: square; margin: 0.3em 0px 0px 1.6em; padding: 0px; list-style-image: url(data:image/gif;base64,R0lGODlhBQANAIAAAGOMnP///yH5BAEAAAEALAAAAAAFAA0AAAIJjI+pu+APo4SpADs=); font-family: sans-serif; font-size: 12.7px; widows: 1; background-color: rgb(255, 255, 255);"><li style="margin-bottom: 0.1em;">We will have future meetings bi-weekly on Fridays at 11:00am. This is the same time as the bi-weekly DIRC meetings but out of phase by a week to make it convenient for those who attend both meetings</li><li style="margin-bottom: 0.1em;">Next meeting will be Friday May 27</li></ul><div><br></div></div></body></html>