<html><body><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000"><div>Dear Maxime,</div><div><br data-mce-bogus="1"></div><div>1. Actually it is not new trigger. This is old FT*FD*CTOF trigger N24 that we had all the time. It is heavily prescaled and does not affect <strong>total</strong> <strong>trigger rate, data rate or dead time. </strong>I just adjusted the CTOF trigger parameters. The main physical triggers <strong>stay the same</strong>. <span data-mce-style="caret-color: #000000; color: #000000; font-family: arial, helvetica, sans-serif; font-size: 16px; 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; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;" style="caret-color: #000000; color: #000000; font-family: arial, helvetica, sans-serif; font-size: 16px; 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; background-color: #ffffff; text-decoration: none; display: inline !important; float: none;">So there is nothing to worry about. In the old version we had incorrect CTOF gains and CTOF trigger parameters. </span>We discussed these changes during todays early morning meeting with people who is interesting on the photoproduction experiments.</div><div><br data-mce-bogus="1"></div><div>2. Again, we discussed today the change in the beam current. The off line analysis shows that the electron purity is about 70% in all 6 sectors. The DC occupancy is also lower then in the inbending runs. We will find out the track reconstruction</div><div>efficiency and electron purity after cook will be done. </div><div><br data-mce-bogus="1"></div><div>Best regards,</div><div>Valery</div><div><br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;" data-mce-style="border-left: 2px solid #1010FF; margin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><b>From: </b>"mdefurne" <mdefurne@jlab.org><br><b>To: </b>"clas12 first exp" <clas12_first_exp@jlab.org><br><b>Sent: </b>Thursday, November 15, 2018 1:03:15 PM<br><b>Subject: </b>Re: [Clas12_first_exp] Data taking status<br></blockquote></div><div data-marker="__QUOTED_TEXT__"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;" data-mce-style="border-left: 2px solid #1010FF; margin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><p>Hi Valery,</p><p>What is this new trigger? Which difference with previous one?<br> Moreover when was it discussed? As previous Run Coordinator barely 23hours ago, nobody started any discussion about a new trigger version. What was wrong with the previous one?<br></p><p>Considering the increase in beam current, how did the DC occupancies change? Are tracks as clear as it was in ced plots? (If you start not being able to disentangle a track from noise with your eye, it might get tricky from a tracking point of view to do the same.)</p><p>From my point of view, both decisions should have been discussed during a RC meeting. (I agree that it might not have been easy with the CLAS collaboration meeting to have such meeting but I would have come to this meeting to ask all questions above).</p><p>The more trigger we have, the trickiest/the most painful the analysis will be.</p><p>Kind regards,</p><p>Maxime<br></p><div class="moz-cite-prefix">On 15/11/2018 17:48, Valery Kubarovsky wrote:<br></div><blockquote cite="mid:179381257.35541313.1542300526666.JavaMail.zimbra@jlab.org"><div style="font-family: arial,helvetica,sans-serif; font-size:
12pt; color: #000000" data-mce-style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000;"><div>Hi All:</div><div>Please see the details in <a class="moz-txt-link-freetext" href="https://logbooks.jlab.org/entry/3626619" target="_blank" data-mce-href="https://logbooks.jlab.org/entry/3626619">https://logbooks.jlab.org/entry/3626619</a></div><div>Best,</div><div>Valery</div></div><br><fieldset class="mimeAttachmentHeader"></fieldset><pre class="moz-quote-pre">_______________________________________________
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