<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Dear all,<div class="">a follow-up: if I select events with the CD-track having an hit in both CTOF and CND-1, trigger efficiency is as follows:</div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="1F072766-C7A2-45CE-8022-A7A1EF4C9C55" src="cid:8428F1AC-C578-47A1-8ACE-C5E96ADEC6FA" class=""></div><div class=""><br class=""></div><div class="">(same color scheme as before). </div><div class=""><br class=""></div><div class="">This demonstrates trigger system is working properly: if a track as a hit in CTOF, the trigger bit 26 will see it. If a track as a hit in CTOF and in CND-1, trigger bit 26,27,28 will see it.</div><div class=""><br class=""></div><div class="">Andreas<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Dec 13, 2018, at 10:43, Andrea Celentano <<a href="mailto:andrea.celentano@ge.infn.it" class="">andrea.celentano@ge.infn.it</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Dear all,<div class="">the following is a first result concerning the CLAS12-CD trigger efficiency.</div><div class=""><ul class=""><li class="">Run was 5781, only trigger source enabled was FT in the energy range(300-8500) MeV</li><li class="">I selected events with tracks in CLAS12-CD by looking at REC::Particle bank and selecting those with status>4000 and charge !=0</li><ul class=""><li class="">I selected events with one and one only track in CLAS12-CD</li><li class="">I kept only events with the track being associated to a CTOF hit (according to the event builder association).</li></ul><li class="">For these events, I look if the trigger bit n. 25 / 26 / 27 are set or not</li><ul class=""><li class="">Trg bit 26 is CTOF only</li><li class="">Trg bit 27 is CND only (layer 1)</li><li class="">Trb bit 28 is CTOF*CND</li></ul></ul><div class="">I expect trg bit 26 efficiency to be ~ 100% since the events I am using have the track hitting the CTOF, while trg bit 27 and 28 may have lower efficiency if the track doesn’t reach the CND (layer1)</div><div class=""><br class=""></div><div class="">Attached plot show efficiency as a function of momentum - trg bit 26 is red, trg bit 27 is green, trg bit 27 is blue.</div><div class=""><br class=""></div><div class="">As you see, Trg bit 26 efficiency is > 99% in full momentum range.</div><div class=""><br class=""></div><div class="">I also attach a plot of theta vs phi for all tracks: there are holes in phi, is this normal?</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">Andrea</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><span id="cid:D8842DE8-2609-4093-9C08-3755191944D7"><PastedGraphic-2.png></span></div><div class=""><br class=""></div><div class="">ZOOM:</div><div class=""><br class=""></div><div class=""><span id="cid:B7EB744E-11D1-4E7F-B832-4917C75879F5"><PastedGraphic-3.png></span></div><div class=""><br class=""></div><div class=""><span id="cid:6180D50E-53DA-4FD7-8124-2065B33D331E"><PastedGraphic-4.png></span></div><div class=""><br class=""></div><div class=""><br class=""><blockquote type="cite" class=""><div class="">On Dec 13, 2018, at 05:04, Viktor Mokeev <<a href="mailto:mokeev@jlab.org" class="">mokeev@jlab.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div id="divtagdefaultwrapper" dir="ltr" style="caret-color: rgb(0, 0, 0); font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-size: 12pt; font-family: Calibri, Helvetica, sans-serif;" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class="">Dear FX,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Anyway, I checked examples with the numerical results you mentioned in your e-mail. The check outcome is attached. My and your results coincide. So, we are on the same page. I just don't know how to read your nomogram. I was unable to get points from them in your examples...</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> Best Regards,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> Victor <span class="Apple-converted-space"> </span><br class=""></div></div><hr tabindex="-1" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline-block; width: 851.609375px;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class=""></span><div id="divRplyFwdMsg" dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">From:</b><span class="Apple-converted-space"> </span>clas12_rgk <<a href="mailto:clas12_rgk-bounces@jlab.org" class="">clas12_rgk-bounces@jlab.org</a>> on behalf of Viktor Mokeev <<a href="mailto:mokeev@jlab.org" class="">mokeev@jlab.org</a>><br class=""><b class="">Sent:</b><span class="Apple-converted-space"> </span>Wednesday, December 12, 2018 10:20:34 PM<br class=""><b class="">To:</b><span class="Apple-converted-space"> </span>Francois-Xavier Girod-Gard<br class=""><b class="">Cc:</b><span class="Apple-converted-space"> </span>Rafayel Paremuzyan; clas12 rgk; clas12 first exp<br class=""><b class="">Subject:</b><span class="Apple-converted-space"> </span>Re: [clas12_rgk] trigger efficiency vs ECal treshold</font><div class=""> </div></div><div dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><div id="x_divtagdefaultwrapper" dir="ltr" style="font-size: 12pt; font-family: Calibri, Helvetica, sans-serif;" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class="">Dear FX,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> I am not sure I understand your plots. We need to speak. I can do this tomorrow afternoon.</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> Best Regards,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> Victor<br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div></div><hr tabindex="-1" style="display: inline-block; width: 851.609375px;" class=""><div id="x_divRplyFwdMsg" dir="ltr" class=""><font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">From:</b><span class="Apple-converted-space"> </span>Francois-Xavier Girod <<a href="mailto:fxgirod@jlab.org" class="">fxgirod@jlab.org</a>><br class=""><b class="">Sent:</b><span class="Apple-converted-space"> </span>Wednesday, December 12, 2018 9:54:55 PM<br class=""><b class="">To:</b><span class="Apple-converted-space"> </span>Viktor Mokeev<br class=""><b class="">Cc:</b><span class="Apple-converted-space"> </span>clas12 rgk; clas12 first exp; Rafayel Paremuzyan<br class=""><b class="">Subject:</b><span class="Apple-converted-space"> </span>Re: [clas12_rgk] trigger efficiency vs ECal treshold</font><div class=""> </div></div><div class=""><div dir="ltr" class="">Dear Viktor<div class=""><br class=""></div><div class="">I have those series of over-informative plots as attached in case they can help the discussion</div><div class="">They show the kinematic coverage for a given beam energy</div><div class=""><br class=""></div><div class="">Units are GeV and degrees. For instance, the points</div><div class="">( Q^2 = 2 , W = 3 ) corresponds to approximately ( mom = 1.1 , theta = 30 )</div><div class="">( Q^2 = 5 , W = 2.5 ) corresponds to approximately ( mom = 1 , theta = 53 ) (this point is off scale on the plots)<br class=""></div><div class="">The 35 degree angle at W = 2.5 occurs around Q^2 = 3.8 and mom = 1.6</div><div class=""><br class=""></div><div class="">Best regards</div><div class="">FX</div></div><br class=""><div class="x_x_gmail_quote"><div dir="ltr" class="">On Wed, Dec 12, 2018 at 6:26 PM Viktor Mokeev <<a href="mailto:mokeev@jlab.org" class="">mokeev@jlab.org</a>> wrote:<br class=""></div><blockquote class="x_x_gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class=""><div id="x_x_gmail-m_-59478190252913499divtagdefaultwrapper" dir="ltr" style="font-size: 12pt; font-family: Calibri, Helvetica, sans-serif;" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class="">Dear All,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> From FX trigger efficiency plot, I see efficiency problems at the lab. energies of the scattered electron <2.0 GeV or for \nu value above 5.5 GeV for the electron beam energy 7.5 GeV. It corresponds to the following W ranges where we have the problem with trigger efficiency:</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Q^2=2.0 GeV^2 W>3.0 GeV</div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Q^2=5.0 GeV^2 W>2.5 GeV</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">For hybrid baryon search, we have no any problem with the trigger efficiency at Q^2<2.0 GeV^2 since the lightest hybrids are expected in the mass range <2.5 GeV. Furthermore, the initial search for hybrid baryons will be carried out at Q^2<2.0 GeV^2.</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> Best Regards,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> Victor<br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div></div><hr style="display: inline-block; width: 839.578125px;" class=""><div id="x_x_gmail-m_-59478190252913499divRplyFwdMsg" dir="ltr" class=""><font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">From:</b><span class="Apple-converted-space"> </span>Francois-Xavier Girod <<a href="mailto:fxgirod@jlab.org" target="_blank" class="">fxgirod@jlab.org</a>><br class=""><b class="">Sent:</b><span class="Apple-converted-space"> </span>Wednesday, December 12, 2018 6:09:53 PM<br class=""><b class="">To:</b><span class="Apple-converted-space"> </span>Viktor Mokeev<br class=""><b class="">Cc:</b><span class="Apple-converted-space"> </span>clas12 rgk; clas12 first exp; Rafayel Paremuzyan<br class=""><b class="">Subject:</b><span class="Apple-converted-space"> </span>Re: [clas12_rgk] trigger efficiency vs ECal treshold</font><div class=""> </div></div><div class=""><div dir="ltr" class="">Dear Viktor<div class=""><br class=""></div><div class="">Rafo can confirmed as he produced the plot, my understanding is that the electron momentum is measured by the drift chambers</div><div class=""><br class=""></div><div class="">Best regards</div><div class="">FX</div></div><br class=""><div class="x_x_gmail-m_-59478190252913499x_gmail_quote"><div dir="ltr" class="">On Wed, Dec 12, 2018 at 6:08 PM Viktor Mokeev <<a href="mailto:mokeev@jlab.org" target="_blank" class="">mokeev@jlab.org</a>> wrote:<br class=""></div><blockquote class="x_x_gmail-m_-59478190252913499x_gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class=""><div id="x_x_gmail-m_-59478190252913499x_gmail-m_1622187504078827668divtagdefaultwrapper" dir="ltr" style="font-size: 12pt; font-family: Calibri, Helvetica, sans-serif;" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class="">Dear FX,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> Just to make sure, whether P on your plots is the energy=momentum of the scattered electron?</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">Best Regards,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> Victor<br class=""></div></div><hr style="display: inline-block; width: 827.546875px;" class=""><div id="x_x_gmail-m_-59478190252913499x_gmail-m_1622187504078827668divRplyFwdMsg" dir="ltr" class=""><font face="Calibri, sans-serif" style="font-size: 11pt;" class=""><b class="">From:</b><span class="Apple-converted-space"> </span>clas12_rgk <<a href="mailto:clas12_rgk-bounces@jlab.org" target="_blank" class="">clas12_rgk-bounces@jlab.org</a>> on behalf of Francois-Xavier Girod <<a href="mailto:fxgirod@jlab.org" target="_blank" class="">fxgirod@jlab.org</a>><br class=""><b class="">Sent:</b><span class="Apple-converted-space"> </span>Wednesday, December 12, 2018 5:58:01 PM<br class=""><b class="">To:</b><span class="Apple-converted-space"> </span>clas12 rgk;<span class="Apple-converted-space"> </span><a href="mailto:clas12_first_exp@jlab.org" target="_blank" class="">clas12_first_exp@jlab.org</a><br class=""><b class="">Cc:</b><span class="Apple-converted-space"> </span>Rafayel Paremuzyan<br class=""><b class="">Subject:</b><span class="Apple-converted-space"> </span>[clas12_rgk] trigger efficiency vs ECal treshold</font><div class=""> </div></div><div class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class="">Dear all<div class=""><br class=""></div><div class="">During today's meeting I attempted to have a discussion on the trigger efficiency as function of ECal threshold. Contradicting statements were made during the meeting, so I want this discussion to be on record here.</div><div class=""><br class=""></div><div class="">Please see the plot</div><div class=""><br class=""></div><div class=""><a href="https://www.jlab.org/Hall-B/secure/clas12/rec_mon/P_Good_emWithEC_5786.png" target="_blank" class="">https://www.jlab.org/Hall-B/secure/clas12/rec_mon/P_Good_emWithEC_5786.png</a><br class=""></div><div class=""><br class=""></div><div class="">from Rafo's study of the trigger efficiency. He analyzed run 5786 which was taken with the random trigger. </div><div class=""><br class=""></div><div class="">- in blue all "good electrons" with Nphe>2, E_PCal > 60 MeV, sampling fraction > 0.2 and fiducial cuts</div><div class=""><br class=""></div><div class="">- in orange, the electrons satisfy in addition E_ECal > 300 MeV</div><div class=""><br class=""></div><div class="">- in red, the events for which the orange set was missing the electron trigger bit</div><div class=""><br class=""></div><div class="">The trigger efficiency is defined as (orange - red) / orange</div><div class=""><br class=""></div><div class=""><a href="https://www.jlab.org/Hall-B/secure/clas12/rec_mon/Eff_All_Good_em_trg_threshold_5786.png" target="_blank" class="">https://www.jlab.org/Hall-B/secure/clas12/rec_mon/Eff_All_Good_em_trg_threshold_5786.png</a><br class=""></div><div class=""><br class=""></div><div class="">The trigger efficiency below 2 GeV drops rapidly, and measuring a cross section in this region is challenging</div><div class=""><br class=""></div><div class="">My question during the meeting was: do we already have data to show the trigger efficiency when the threshold is 150 MeV. My understanding is that we do not have this data and that to answer this question we need to take another random trigger run with the lower threshold.</div><div class=""><br class=""></div><div class="">What I have in mind is the following: I agree that the bulk of the RG-K data taking can take place at 300 MeV ECal trigger threshold and highest possible luminosity, but I would like to consider the possibility to take a few days at a lower trigger threshold to extend the cross section measurement to higher W. Again my purpose is to minimize the final systematic uncertainties.</div><div class=""><br class=""></div><div class="">Best regards</div><div class="">FX</div></div></div></div></div></div></blockquote></div></div></div></blockquote></div></div></div><span id="cid:584BD86A-1E3B-4550-9D53-96DADC32ABA2@ge.infn.it" class=""><FX_VM_check.pdf></span><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Clas12_first_exp mailing list</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="mailto:Clas12_first_exp@jlab.org" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">Clas12_first_exp@jlab.org</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="https://mailman.jlab.org/mailman/listinfo/clas12_first_exp" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">https://mailman.jlab.org/mailman/listinfo/clas12_first_exp</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""></div></blockquote></div><br class=""></div></div></div></blockquote></div><br class=""></div></body></html>