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<p class="MsoNormal">Friday is the 24<sup>th</sup>.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">-Eugene<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt">
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<p class="MsoNormal"><b>From:</b> Stepan Stepanyan <stepanya@jlab.org> <br>
<b>Sent:</b> Wednesday, February 22, 2023 17:09<br>
<b>To:</b> Cole Smith <lcsmith@jlab.org>; Daniel Carman <carman@jlab.org>; Valery Kubarovsky <vpk@jlab.org>; Maurizio Ungaro <ungaro@jlab.org>; Florian Hauenstein <hauenst@jlab.org>; Youri Sharabian <youris@jlab.org>; Raffaella De Vita <devita@jlab.org>; Yuri
Gotra <gotra@jlab.org>; Silvia Niccolai <silvia@jlab.org>; Rafayel Paremuzyan <rafopar@jlab.org>; Eugene Pasyuk <pasyuk@jlab.org>; Sergey Boyarinov <boiarino@jlab.org><br>
<b>Cc:</b> Veronique Ziegler <ziegler@jlab.org>; Gagik Gavalian <gavalian@jlab.org>; Nathan Baltzell <baltzell@jlab.org>; Patrick Achenbach <patricka@jlab.org>; Pierre Chatagnon <pierrec@jlab.org>; hallb <hallb@jlab.org><br>
<b>Subject:</b> Reassessing the detector performance for high luminosity operations<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal"><span style="font-size:10.5pt">Dear all,</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal"><span style="font-size:10.5pt">Our third meeting to discuss CLAS12 subsystem performance at twice the designed luminosity will take place on Friday, February 22 at 1:30 pm EST. At this meeting, we will discuss CVT (SVT and BMT). </span><o:p></o:p></p>
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<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal"><span style="font-size:10.5pt">The meeting is on your calendars, we have F224-225 for in-person attendance.</span><o:p></o:p></p>
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<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt">For those who wants to connect remotely, the zoom info is following (yje same as on Friday):</span><o:p></o:p></p>
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<div>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:#0956B5;letter-spacing:.3pt"><a href="https://jlab-org.zoomgov.com/j/1607174363?pwd=SHAwcXBjYmxwMEEwS04valZ4OHJGQT09">https://jlab-org.zoomgov.com/j/1607174363?pwd=SHAwcXBjYmxwMEEwS04valZ4OHJGQT09</a></span><o:p></o:p></p>
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<p class="MsoNormal">ID: <span style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:#232333;letter-spacing:.3pt;background:white">160 717 4363</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:#232333;letter-spacing:.3pt;background:white">Passcode: 814155</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:#232333;letter-spacing:.3pt;background:white"><br>
<br>
</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt">Regards, Stepan</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt">p.s. Sorry, I just realized that I did not forward my previous calls for the meeting to the hallb mailing list.</span><o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
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<p class="MsoNormal">On Feb 5, 2023, at 10:56 AM, Stepan Stepanyan <<a href="mailto:stepanya@jlab.org">stepanya@jlab.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt">Dear all,</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal"><span style="font-size:10.5pt">After responses from you, here how the agenda for our discussions of subsystem performances at x2 higher luminosity looks like. </span><o:p></o:p></p>
<div>
<ul type="disc">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.5pt">Friday, February 17, 1:30 pm: FT, FTOF/CTOF and CND;</span><o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.5pt">Wednesday, February 22, 2:30 pm: ECal, DAQ, and beamline;</span><o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.5pt">Friday, February 24, 1:30 pm: CVT;</span><o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.5pt">Friday, March 3, 1:30 pm: DC, RICH, LTCC, and HTCC.</span><o:p></o:p></li></ul>
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<div>
<p class="MsoNormal"><span style="font-size:10.5pt">Note, x2 higher means, for example, for RG-A, 150 nA on a 5 cm long hydrogen target. </span><o:p></o:p></p>
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<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt">I will arrange for meeting rooms and also zoom in the coming week. We will aim to keep sessions not longer than an hour and a half. We can have follow-up discussions if needed.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt">Regards, Stepan</span><o:p></o:p></p>
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<p class="MsoNormal"> <br>
<br>
<o:p></o:p></p>
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<p class="MsoNormal">On Feb 1, 2023, at 1:27 PM, Stepan Stepanyan <<a href="mailto:stepanya@jlab.org">stepanya@jlab.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal">Dear all,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal">Thanks for the replies. Based on the availability of subsystem owners, I have the following schedule for discussions (see below). Please, let me know if changes are needed. I know the times for Wednesday’s (2:30 pm EST) and Friday’s (1:30
pm EST) meetings are not ideal for Silvia and Raffaella, so if needed, we can find some morning time for these two subsystems. It will be good to know the discussion time each subsystem will need. We may be able to combine some of these.\<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<ul type="disc">
<ul type="circle">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level2 lfo2;white-space:pre-wrap">
FTOF/CTOF, and CND, February 17<o:p></o:p></li></ul>
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<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo2">
<o:p> </o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo2">
<o:p> </o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo2">
<o:p> </o:p></li></ul>
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<ul type="circle">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level2 lfo2;white-space:pre-wrap">
DAQ and beam line, February 22<o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level2 lfo2;white-space:pre-wrap">
CVT, February 24<o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level2 lfo2;white-space:pre-wrap">
RICH, LTCC, and HTCC, March 1<o:p></o:p></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level2 lfo2;white-space:pre-wrap">
<span style="font-family:"-apple-system-font",serif">ECal and FT, DC (tracking without uRWELL), March 3</span><o:p></o:p></li></ul>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"-apple-system-font",serif">Regards, Stepan</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"-apple-system-font",serif"><br>
<br>
</span><o:p></o:p></p>
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<span style="font-family:"-apple-system-font",serif"><o:p> </o:p></span></li></ul>
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<p class="MsoNormal">On Jan 20, 2023, at 8:33 PM, Stepan Stepanyan <<a href="mailto:stepanya@jlab.org">stepanya@jlab.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Dear all,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal">During the “High luminosity upgrade” TF work about 2 years ago, we assessed the performance of subsystems with x2 higher luminosity operations. Back then, we concluded that the detectors would operate and maintain their performances (resolutions
and efficiencies) with x2 higher than the designed luminosity of CLAS12 (see reports at <a href="https://wiki.jlab.org/physdivwiki/index.php/Task_Forces_2020#tab=High_Luminosity|CLAS12|CLAS12">https://wiki.jlab.org/physdivwiki/index.php/Task_Forces_2020#tab=High_Luminosity%7CCLAS12%7CCLAS12</a>).
There was one caveat though, we were not sure about software performance for some of the subsystems. Now that our software is ready for pass2 and as good as it can be for the future, I believe it is time to return to the performance discussions again. I propose
to use the Hall-B round table, Wednesdays at 2:30 pm, and TF, Fridays at 1:30 pm, meetings in February for such discussions. These discussions should cover (not in any particular order):<o:p></o:p></p>
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<p class="MsoNormal">* FTOF/CTOF<o:p></o:p></p>
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<p class="MsoNormal">* CND<o:p></o:p></p>
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<p class="MsoNormal">* ECal<o:p></o:p></p>
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<div>
<p class="MsoNormal">* HTCC<o:p></o:p></p>
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<div>
<p class="MsoNormal">* RICH<o:p></o:p></p>
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<div>
<p class="MsoNormal">* LTCC<o:p></o:p></p>
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<div>
<p class="MsoNormal">* FT<o:p></o:p></p>
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<p class="MsoNormal">* DAQ<o:p></o:p></p>
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<p class="MsoNormal">* Beamline<o:p></o:p></p>
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<p class="MsoNormal">* CVT <o:p></o:p></p>
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<p class="MsoNormal">* FD tracking (as is, without uRWELL addition)<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Subsystem experts, please let me know your availability and when you will be ready for such discussions. Please reply by the end of next week to be able to start scheduling the meetings in February.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal">Stepan <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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