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Is there a test plan for this? Point me to it please.</div>
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Shawn</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Gradient_task_force <gradient_task_force-bounces@jlab.org> on behalf of Mike McCaughan <michaelm@jlab.org><br>
<b>Sent:</b> Tuesday, February 27, 2024 12:59<br>
<b>To:</b> Tom Powers <powers@jlab.org>; gradient_task_force@jlab.org <gradient_task_force@jlab.org>; Harshani Senevirathne <iresha@jlab.org><br>
<b>Subject:</b> Re: [Gradient_task_force] Cavity maintenance opportunities</font>
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C75 limitations attached. Cavity 1 is at 11.8 as it encountered a beam line vacuum fault and quench repeatably at 12.3 MV/m. Please keep and eye on beam line and waveguide vacuum if you attempt to process that cavity. Cavity 8 also looks like it encounters
beam line vacuum faults at ~15.5 MV/m.</div>
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Mike<br>
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<div dir="ltr" id="x_divRplyFwdMsg"><span style="font-family:Calibri,sans-serif; font-size:11pt; color:rgb(0,0,0)"><b>From:</b> Gradient_task_force <gradient_task_force-bounces@jlab.org> on behalf of Tom Powers <powers@jlab.org><br>
<b>Sent:</b> Tuesday, February 27, 2024 12:49 PM<br>
<b>To:</b> gradient_task_force@jlab.org <gradient_task_force@jlab.org>; Harshani Senevirathne <iresha@jlab.org><br>
<b>Subject:</b> Re: [Gradient_task_force] Cavity maintenance opportunities</span>
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<div><span style="font-size:11pt">2, 5 and 8 had 100 ms Quenches back in Sept. That is an indication of a<br>
multipactor. They should be pulsed processed.<br>
<br>
I don't know why cavity 1 is turned down so low.<br>
<br>
I will check recent data for electronic quenches in 1L05 1 and 8 and 100<br>
ms quenches everywhere else in 1L05 later this afternoon.<br>
<br>
If you are processing 1 or 8 and the adjacent vacuum valve closes due to<br>
an outburst you should stop doing that cavity so that you lower the risk<br>
of the valve shedding particles.<br>
<br>
Tom<br>
<br>
On 2/27/2024 12:09 PM, Harshani Senevirathne wrote:<br>
> 1L05-1 and 8.<br>
<br>
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