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That particular ramp has a known cause which is why I didn't include it in the timeline; it was also only the solenoid.</div>
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<div class="elementToProof"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">There was also another controlled ramp due to cryo issues:
<a href="https://logbooks.jlab.org/entry/4213546" id="LPlnk391720" class="OWAAutoLink">
https://logbooks.jlab.org/entry/4213546</a></span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Stepan Stepanyan <stepanya@jlab.org><br>
<b>Sent:</b> Monday, February 12, 2024 6:04 PM<br>
<b>To:</b> Brian Eng <beng@jlab.org><br>
<b>Cc:</b> dsg-hallb magnets <dsg-hallb_magnets@jlab.org><br>
<b>Subject:</b> Re: [Dsg-hallb_magnets] Torus Fast Dump Timeline</font>
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<div class="" style="word-wrap:break-word; line-break:after-white-space">Brian,
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<div class=""><span data-preserver-spaces="true" class="" style="color:rgb(14,16,26); margin-top:0pt; margin-bottom:0pt">Thank you for your investigation. We definitely need the meeting to get to the bottom of this. We cannot afford so many dumps. This is destructive
for the experiments and very bad for magnets. By the way, we had one more controlled ramp down of the solenoid on 01/23 - </span><a target="_blank" href="https://logbooks.jlab.org/entry/4242478" class="x_editor-rtfLink" style="margin-top:0pt; margin-bottom:0pt; color:rgb(74,110,224)"><span data-preserver-spaces="true" class="" style="margin-top:0pt; margin-bottom:0pt">https://logbooks.jlab.org/entry/4242478</span></a><span data-preserver-spaces="true" class="" style="color:rgb(14,16,26); margin-top:0pt; margin-bottom:0pt">.</span></div>
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<div>Regards, Stepan</div>
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<div class="">On Feb 12, 2024, at 5:08 PM, Brian Eng via Dsg-hallb_magnets <<a href="mailto:dsg-hallb_magnets@jlab.org" class="">dsg-hallb_magnets@jlab.org</a>> wrote:</div>
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<div class="">We’ll need to have a meeting next week when Probir is back, but at least starting to gather information.<br class="">
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9/29/2023<br class="">
Checkout is completed<br class="">
<a href="https://logbooks.jlab.org/entry/4189383" class="">https://logbooks.jlab.org/entry/4189383</a> – there is a spreadsheet that has the actual QD values, I’m just not sure where.<br class="">
<a href="https://logbooks.jlab.org/entry/4189323" class="">https://logbooks.jlab.org/entry/4189323</a> – instrumentation checkout PDF attached<br class="">
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9/30<br class="">
<a href="https://logbooks.jlab.org/entry/4189846" class="">https://logbooks.jlab.org/entry/4189846</a> – flakey switches in VT panel causing controlled ramp downs at low current<br class="">
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10/10<br class="">
<a href="https://logbooks.jlab.org/entry/4196814" class="">https://logbooks.jlab.org/entry/4196814</a> – first fast dump & interlocks<br class="">
<a href="https://logbooks.jlab.org/entry/4196848" class="">https://logbooks.jlab.org/entry/4196848</a> – cryo recovery and another comment about flakey switches<br class="">
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12/10<br class="">
<a href="https://logbooks.jlab.org/entry/4232387" class="">https://logbooks.jlab.org/entry/4232387</a> – second fast dump<br class="">
<a href="https://logbooks.jlab.org/entry/4232495" class="">https://logbooks.jlab.org/entry/4232495</a> – interlocks<br class="">
<a href="https://logbooks.jlab.org/entry/4232499" class="">https://logbooks.jlab.org/entry/4232499</a> – hardware jumpers installed to bypass switches<br class="">
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2/10/2024<br class="">
<a href="https://logbooks.jlab.org/entry/4250279" class="">https://logbooks.jlab.org/entry/4250279</a> - third fast dump & interlocks<br class="">
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