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Hi all,</div>
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<p style="margin-top:0px;margin-bottom:0px"><span style="margin: 0px; font-family: Calibri, Arial, Helvetica, sans-serif; color: black;">Last evening Jack found the short on the magnet, which is located in the saddle coil (</span><a href="https://logbooks.jlab.org/entry/3921566" target="_blank" rel="noopener noreferrer" data-auth="NotApplicable" data-linkindex="0" style="margin:0px;font-family:Calibri, Arial, Helvetica, sans-serif">https://logbooks.jlab.org/entry/3921566</a><span style="margin: 0px; font-family: Calibri, Arial, Helvetica, sans-serif; color: black;">).
He has a proposed solution, which requires jacking up the coil and inserting G10 shims under it. This work requires careful planning with Jessie and Jack's teams and will likely take a 2--3 days to execute the full plan, which will occur on da</span><span style="margin: 0px; font-family: Calibri, Arial, Helvetica, sans-serif; color: black;">y
shifts. </span><span style="margin: 0px; font-family: Calibri, Arial, Helvetica, sans-serif; color: black;"><font size="3" face="Calibri,Arial,Helvetica,sans-serif" style="background-color: white;"><span style="margin:0px">The tentative plan now is for Hall
A to take beam under the condition of operating only </span></font><font face="Calibri,Arial,Helvetica,sans-serif" style="font-size: 14px; background-color: white;"><span style="margin:0px;font-size:12pt">the </span></font><font size="3" face="Calibri,Arial,Helvetica,sans-serif" style="background-color: white;"><span style="margin:0px">BigBite
magnet on Swing and Owl shifts, with the SBS magnet locked out.</span><span style="margin:0px"> </span></font></span><br>
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>From the Ops standpoint there's work to be done regarding control of the SBS and corrector magnets: The corrector magnet + FSD checkout is 90% complete; Jerry Kowal's team (from SSG) is assessing whether they need to revisit one of those magnets based on the
studies performed towards the end of last week. Additionally, once the SBS magnet is fully functional, they will need to verify their read back and scaling of the current in that magnet; he estimates that would take about an hour of work. </div>
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<div style="margin: 0px; color: black; background-color: white;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">Physics Division has decided to issue the Run Certificate
if Ops approves a procedure acceptable to machine control for running with the SBS off, and </span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">the</span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);"> readiness
of the exit beam line FSD system. This will be discussed at a meeting for this purpose at 2 pm today.</span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);"> </span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">This
would allow us to tune the beam down to the dump with the BigBite magnet off, and then work on our BigBite optics program thereafter with BigBite powered on. </span></div>
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<font size="3" face="Calibri,Arial,Helvetica,sans-serif">The plan for today in the Hall is as follows: </font></div>
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<li><span style="margin:0px"><font size="3" face="Calibri,Arial,Helvetica,sans-serif">Jessie is working to complete his checklist so we can transition to Controlled Access. This should be completed in about an hour (10:30 am ET). </font><br>
</span></li><li><span style="margin:0px"><font size="3" face="Calibri,Arial,Helvetica,sans-serif">Jack, Jessie, Robin, and Whit will prepare the work plan for the SBS magnet. This will be posted as a HAList. </font></span></li><li><span style="margin:0px"><font size="3" face="Calibri,Arial,Helvetica,sans-serif">Jack will work with Holly on the GEM gas system </font></span></li><li><span style="margin:0px"><font size="3" face="Calibri,Arial,Helvetica,sans-serif">On Swing and Owl shifts: Accelerator to hopefully deliver beam to the Hall </font></span></li></ul>
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Best,</div>
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David (Hall A RC)</div>
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<span style="margin:0px">----------------------------------------------------------------</span></div>
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David Flay, Ph. D.</div>
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Hall A/C Staff Scientist</div>
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Thomas Jefferson National Accelerator Facility</div>
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Office: CEBAF Center, C119</div>
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