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Valery,
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<div class="">As we discussed at the meeting, the idea is not to go higher in current. The point is to reduce amount of data that never will be used. By the way, we have now 10.41 GeV. </div>
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<div class="">Regards, Stepan<br class="">
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<div class="">On Dec 7, 2019, at 8:08 PM, Valery Kubarovsky <<a href="mailto:vpk@jlab.org" class="">vpk@jlab.org</a>> wrote:</div>
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<span style="font-size: 14pt;" class="">Hi Stepan,<o:p class=""></o:p></span></div>
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<span style="font-size: 14pt;" class="">Personally, I have no objections to go from 250 to 300 MeV in the PCAL+ECAL sum.<o:p class=""></o:p></span></div>
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<span style="font-size: 14pt;" class="">It is true that RG-A used 300 MeV most of the time. However, when the energy of the machine went down to 10.2 GeV this parameter was set to 250 or even 200 MeV. See attached table. But I want to ask: do we want to go
to 45 or 50 nA? Until this decision we still have time to discuss.<o:p class=""></o:p></span></div>
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<span style="font-size: 14pt;" class="">Best,<o:p class=""></o:p></span></div>
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<span style="font-size: 14pt;" class="">Valery<o:p class=""></o:p></span></div>
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<span style="font-size: 14pt;" class=""><o:p class=""> </o:p></span></div>
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<b class=""><span style="font-size: 12pt;" class="">From:<span class="Apple-converted-space"> </span></span></b><span style="font-size: 12pt;" class="">Clas12_rgb <<a href="mailto:clas12_rgb-bounces@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">clas12_rgb-bounces@jlab.org</a>>
on behalf of Stepan Stepanyan <<a href="mailto:stepanya@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">stepanya@jlab.org</a>><br class="">
<b class="">Date:<span class="Apple-converted-space"> </span></b>Saturday, December 7, 2019 at 7:56 PM<br class="">
<b class="">To:<span class="Apple-converted-space"> </span></b>Daria Sokhan <<a href="mailto:daria@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">daria@jlab.org</a>>, "<a href="mailto:clas12_rgb@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">clas12_rgb@jlab.org</a>"
<<a href="mailto:clas12_rgb@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">clas12_rgb@jlab.org</a>>, Sergey Boyarinov <<a href="mailto:boiarino@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">boiarino@jlab.org</a>>,
Nathan Baltzell <<a href="mailto:baltzell@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">baltzell@jlab.org</a>><br class="">
<b class="">Subject:<span class="Apple-converted-space"> </span></b>Re: [Clas12_rgb] [EXTERNAL] Electron trigger thresholds<o:p class=""></o:p></span></div>
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<o:p class=""> </o:p></div>
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<span style="font-size: 12pt;" class="">Dear all,<o:p class=""></o:p></span></div>
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<span style="font-size: 12pt;" class=""><o:p class=""> </o:p></span></div>
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<div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class="">
<span style="font-size: 12pt;" class="">As it was pointed out, 250 MeV corresponds to ~1.5 GeV/c electron momentum. RG-A used 300 MeV - ~1.8 GeV/c. It seems sensible to go to 300 MeV threshold, unless someone has a strong argument for analysis with scattered
electrons < 2 GeV/c momenta. No need to collect data that will not be used and use computing resources for it. <o:p class=""></o:p></span></div>
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<span style="font-size: 12pt;" class=""><o:p class=""> </o:p></span></div>
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<span style="font-size: 12pt;" class="">Regards, Stepan<o:p class=""></o:p></span></div>
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<b class=""><span style="" class="">From:</span></b><span style="" class=""><span class="Apple-converted-space"> </span>Clas12_rgb <<a href="mailto:clas12_rgb-bounces@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">clas12_rgb-bounces@jlab.org</a>>
on behalf of Daria Sokhan <<a href="mailto:daria@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">daria@jlab.org</a>><br class="">
<b class="">Sent:</b><span class="Apple-converted-space"> </span>Saturday, December 7, 2019 3:52 PM<br class="">
<b class="">To:</b><span class="Apple-converted-space"> </span><a href="mailto:clas12_rgb@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">clas12_rgb@jlab.org</a><span class="Apple-converted-space"> </span><<a href="mailto:clas12_rgb@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">clas12_rgb@jlab.org</a>>;
Sergey Boyarinov <<a href="mailto:boiarino@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">boiarino@jlab.org</a>>; Nathan Baltzell <<a href="mailto:baltzell@jlab.org" style="color: rgb(149, 79, 114); text-decoration: underline;" class="">baltzell@jlab.org</a>><br class="">
<b class="">Subject:</b><span class="Apple-converted-space"> </span>[Clas12_rgb] [EXTERNAL] Electron trigger thresholds</span><o:p class=""></o:p></div>
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<span style="font-family: Verdana, sans-serif;" class="">Dear all, <o:p class=""></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class=""><o:p class=""> </o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class="">Our current physics production is at 40nA and we have:<o:p class=""></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class=""><o:p class=""> </o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class="">* total trigger rate of 22kHz <o:p class=""></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class="">* electron rate of 16kHz.<o:p class=""></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class="">* muon rate comparable with spring running.<o:p class=""></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class=""><o:p class=""> </o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class="">Electron rate is very high -- the purity of the electron trigger will be checked as soon as the first production data files are cooked, but in the meantime we should revisit the trigger thresholds. The
electron trigger is currently as follows:<o:p class=""></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class=""><o:p class=""> </o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class="">* HTCC nphe > 2<o:p class=""></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class="">* PCAL Emin > 60 MeV<o:p class=""></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class="">* PCAL + ECAL Esum > 250 MeV<o:p class=""></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class=""><o:p class=""> </o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class="">The 250 MeV limit was brought up for discussion -- should be keep this, or raise it to 300 MeV? Please weigh in if you have any comments!<o:p class=""></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class=""><o:p class=""> </o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class="">Many thanks,<o:p class=""></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class="">Daria<o:p class=""></o:p></span></div>
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<span style="font-family: Verdana, sans-serif;" class=""><o:p class=""> </o:p></span></div>
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