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<span style="margin: 0px; font-family: Calibri, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">Dear Collaborators,</span><br>
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There was good progress with the tune of the beam during the holidays. Beam has been sent to the Hall D dumplet just before the tagger Hall. However, today<span style="caret-color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important"><span> </span>(Monday,
Dec. 2nd)</span> due various hiccups, <span style="caret-color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">MCC will not</span> do the planned tests (spin dance and RD
stress tests). Those are postponed to a date not determined yet. Instead, MCC will finalize its tuning to the Halls. Consequently, we have to be ready for physics beam by 4pm today and <span style="caret-color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">the
Hall will close <span style="caret-color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">
at noon today </span>(PSS status to <span style="caret-color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">beam permit</span>) in order to allow for final beam tuning to
Hall D.</span></div>
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One issue affecting us <span style="caret-color: rgb(0, 0, 0); font-family: Calibri, Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255); display: inline !important">
currently </span>is that the 5th pass RF separator is not operational. This means beam cannot be sent to both Hall B (5 passes ) and D (5.5 passes) at the same time. The separator experts are working on fixing this problem today. (The tuning to Halls B and
D will be done in alternance.)</div>
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Please let me know if you have any question.</div>
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Thank you,</div>
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Alexandre Deur, </div>
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Hall D run coordinator (757) 383 5542</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Alexandre Deur <deurpam@jlab.org><br>
<b>Sent:</b> Wednesday, November 27, 2019 11:36 AM<br>
<b>To:</b> GlueX Collaboration <gluex-collaboration@jlab.org>; halld@jlab.org <halld@jlab.org><br>
<b>Subject:</b> Run update. Shifts Monday/Tuesday owl on standby</font>
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<span style="margin:0px; font-family:Calibri,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline!important">Dear Collaborators,</span><br>
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The plan, as shown at the weekly MCC meeting today, is to start physics beam delivery to Hall D at <span style="margin:0px; background-color:rgb(255,255,255); display:inline!important">8am </span>on Tuesday Dec. 3rd. Consequently, shifts are now on<span> </span><span style="margin:0px">standby </span>up
to <span style="font-family:Calibri,Arial,Helvetica,sans-serif; background-color:rgb(255,255,255); display:inline!important">
Tuesday </span>8am.</div>
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This 24h delay is only due to the usual difficulties of establishing the beam. Otherwise, most of the accelerator work is going well and is more or less on track.</div>
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The nominal beam energy for Hall D is now decided and is 11.41 GeV. We will run at this energy providing that it is sustainable. The previous runs were at 11.6 GeV. </div>
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The Hall is ready for beam. It is going now to Control Access and will remain so until we need to close it (presumably Monday evening) for beam delivery. </div>
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Please let me know if you have any question.</div>
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Thank you,</div>
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Alexandre Deur, </div>
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Hall D run coordinator (757) 383 5542</div>
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