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For those that might have missed this (ARC10 = Hall D).
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<blockquote type="cite" class="">We are projecting the begin of physics to be around<br class="">
August 26-27 instead of August 23 for Halls B and C. <b class=""><u class="">The situation to get<br class="">
parts in to make ARC10 functional is uncertain and we expect to give an<br class="">
update on the Hall D schedule in 1-2 weeks</u></b>. Hall A schedule is unchanged<br class="">
(September 3). <br class="">
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<div class=""><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=""> We should discuss tomorrow the impact etc.</span></div>
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<div class="">Thanks,</div>
<div class="">Or<br class="">
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<span style="color: rgb(102, 102, 102);" class="">--</span></div>
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<span style="color: rgb(102, 102, 102);" class="">Or Hen,</span><br style="color: rgb(102, 102, 102);" class="">
<span style="color: rgb(102, 102, 102);" class="">Massachusetts institute of Technology,</span><br style="color: rgb(102, 102, 102);" class="">
<span style="color: rgb(102, 102, 102);" class="">Cambridge, MA 02139, USA.</span><br style="color: rgb(153, 153, 153);" class="">
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<div class=""><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.hen-2Dlab.com_&d=DwMFAg&c=CJqEzB1piLOyyvZjb8YUQw&r=66Sb4pp0d4diwFuNQ_jTiKyZDsB_FG2X3Hlmk9_wuSY&m=_ZCVEMfj4-PtKMEJFbOJ5iYjJ8q34DKUSb1VQExqFkE&s=KYo15FeLcBK40SFqaQaoq5yfRwu41cqcVtkJQ6uVOs0&e=" style="font-size: 14px;" class=""><font face="Arial" style="font-size: 12px;" class="">www.hen-lab.com</font></a></div>
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<div class="">Begin forwarded message:</div>
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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="">Eliezer Piasetzky <<a href="mailto:eip@tauphy.tau.ac.il" class="">eip@tauphy.tau.ac.il</a>><br class="">
</span></div>
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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="">[Cuga] Start of the Experimental Program- a message from Rolf Ent and Camille Ginsburg for the Nuclear Physics Experiment Scheduling Committee
(fwd)</b><br class="">
</span></div>
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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="">August 16, 2021 at 10:26:30 AM EDT<br class="">
</span></div>
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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=""><<a href="mailto:hen@mit.edu" class="">hen@mit.edu</a>><br class="">
</span></div>
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---------- Forwarded message ----------<br class="">
Date: Fri, 13 Aug 2021 12:17:04 +0000<br class="">
From: Lorelei Carlson <<a href="mailto:lorelei@jlab.org" class="">lorelei@jlab.org</a>><br class="">
To: "<a href="mailto:cuga@jlab.org" class="">cuga@jlab.org</a>" <<a href="mailto:cuga@jlab.org" class="">cuga@jlab.org</a>><br class="">
Subject: [Cuga] Start of the Experimental Program- a message from Rolf Ent and<br class="">
Camille Ginsburg for the Nuclear Physics Experiment Scheduling Committee<br class="">
<br class="">
<br class="">
The Scheduled Accelerator Down (SAD) period is coming to an end and machine<br class="">
restoration is in full progress. A 1st-pass tune beam has made its way<br class="">
through the two linacs and two arcs into a dumplet at the end of ARC2 at<br class="">
1.82 GeV/pass, the first of the two energies scheduled for the period August<br class="">
to December 2021. <br class="">
<br class="">
Many systems were refurbished or upgraded during this SAD to improve the<br class="">
overall machine reliability. Two well-known examples are the new 2K cold box<br class="">
and the installation of two new cryomodules in the North linac - one of<br class="">
them, the first of the new generation of C75 modules also uses a new<br class="">
generation (3G) of low-level RF controls. Bringing these systems into<br class="">
operation is going well and are mostly on schedule. A place we are behind<br class="">
schedule is in the restoration of the ARC box power supplies which power the<br class="">
magnets to recirculate the beam. <br class="">
<br class="">
During regular maintenance on these supplies an unexpected issue was<br class="">
discovered with a key component that is common for all the ARC power<br class="">
supplies. After consultation with the manufacturer it was determined that we<br class="">
must replace these components to support the upcoming run. The replacement<br class="">
parts were a mix of spares and newly procured components. Unfortunately,<br class="">
among the newly procured components were many that experienced early failure<br class="">
and do not meet specifications. We are working with the supplier and<br class="">
manufacturer to evaluate the situation. Further, these components are now in<br class="">
short supply in the marketplace due to global supply chain issues. With help<br class="">
from many, we now have sufficient components to bring all the affected ARC<br class="">
power supplies back into operation by August 22 except for ARC10, which is<br class="">
necessary to bring Hall D into operation. <br class="">
<br class="">
<br class="">
<br class="">
Tuning of the machine will take a few days after the ARC9 power supply is<br class="">
available on August 22. We are projecting the begin of physics to be around<br class="">
August 26-27 instead of August 23 for Halls B and C. The situation to get<br class="">
parts in to make ARC10 functional is uncertain and we expect to give an<br class="">
update on the Hall D schedule in 1-2 weeks. Hall A schedule is unchanged<br class="">
(September 3). <br class="">
<br class="">
_______________________________________________<br class="">
Cuga mailing list<br class="">
<a href="mailto:Cuga@jlab.org" class="">Cuga@jlab.org</a><br class="">
https://mailman.jlab.org/mailman/listinfo/cuga</div>
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