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FYI, we will get beam today swing. Any work in the hall must be done by 3 pm.
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<span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">From:
</b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">Maurik Holtrop <<a href="mailto:maurik@physics.unh.edu" class="">maurik@physics.unh.edu</a>><br class="">
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<span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">Subject:
</b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class=""><b class="">[EXTERNAL] Shifts for Monday Sept 13, 2021</b><br class="">
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<span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">Date:
</b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">September 13, 2021 at 1:03:24 PM EDT<br class="">
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<span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">To:
</b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">Alic Spellman <<a href="mailto:alspellm@ucsc.edu" class="">alspellm@ucsc.edu</a>>, Robert Johnson <<a href="mailto:rjohnson@ucsc.edu" class="">rjohnson@ucsc.edu</a>>,
Pierfrancesco Butti <<a href="mailto:pbutti@slac.stanford.edu" class="">pbutti@slac.stanford.edu</a>>, Andrea Celentano <<a href="mailto:andrea.celentano@ge.infn.it" class="">andrea.celentano@ge.infn.it</a>>, Alessandra Filippi <<a href="mailto:filippi@to.infn.it" class="">filippi@to.infn.it</a>>,
Annalisa D'Angelo <<a href="mailto:annalisa.dangelo@roma2.infn.it" class="">annalisa.dangelo@roma2.infn.it</a>><br class="">
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<span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">Cc:
</b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">Timothy Knight Nelson <<a href="mailto:tknelson@slac.stanford.edu" class="">tknelson@slac.stanford.edu</a>>, Stepan Stepanyan <<a href="mailto:stepanya@jlab.org" class="">stepanya@jlab.org</a>>,
Nathan Baltzell <<a href="mailto:baltzell@jlab.org" class="">baltzell@jlab.org</a>>, Rafayel Paremuzyan <<a href="mailto:rafopar@jlab.org" class="">rafopar@jlab.org</a>>, Cameron Bravo <<a href="mailto:cbravo135@gmail.com" class="">cbravo135@gmail.com</a>><br class="">
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Dear HPS,
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<div class="">Here is an update to the previous plans from MCC.</div>
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<div class="">This morning a problem with the vacuum in the accelerator is preventing beam delivery to the Hall-D separator, so it is not possible to do that work. The decision was made to postpone the Hall-D separator until tomorrow.</div>
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<div class="">This means that as soon as beam can be restored we will start running again. There is no estimated time for this, but it is likely to still take a while before beam comes back.</div>
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<div class="">The current outlook it:</div>
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<div class="">Today:</div>
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<li class="">Swing shift will likely see beam.</li><li class="">Owl shift will very likely see beam. The beam will be taken away again at the end of owl shift. We will go through the same shutdown procedure as today.</li><li class="">There will be no beam, and thus no shift, tomorrow, Tuesday, during the day.</li><li class="">Hopefully the beam will be restored at some point during swing Tuesday, though this may not be until owl. </li></ul>
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<div class="">Best regards,</div>
<div class="">Maurik</div>
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<div class="">Previous Plans</div>
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<div class="">The plan is to take away the beam on Monday at 4 am to start work on the separator for Hall-D. The work is expected to take all day. According to Jay Benesch, beam restoration to Hall-B can be expected during swing shift. The Monday morning accelerator
meeting may give more clarity on the expectations for restoring beam.</div>
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<div class="">For the owl shift, at 4 am when the beam is taken away:</div>
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<li class="">Turn off all the detectors. HV for the Ecal and Hodoscope, HV and LV for the SVT.</li><li class="">Retract the SVT.</li><li class="">Retract the target.</li><li class="">Ramp down the chicane magnets.</li></ul>
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<div class="">After everything is secured, you can end your shift.</div>
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<div class="">For the day shift:</div>
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<li class="">The day shift is cancelled.</li><li class="">We can go to controlled access for any detector or beam line work.</li></ul>
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<div class="">For the swing shift:</div>
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<li class="">You should be on standby, ready to come to shift on a short notice, or work from the counting house.</li><li class="">Beam restoration will require the full beam setup procedure, starting with beam to the tagger.</li><ul class="">
<li class="">We do not know to what extend the work during the day will have modified the accelerator parameters.</li></ul>
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<div class="">For the owl shift:</div>
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<li class="">Hopefully you will have a productive shift.</li></ul>
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<div class="">When more information becomes available I will send another update.</div>
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<div class="">Best regards,</div>
<div class="">Maurik</div>
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