[Gradient_task_force] Cavity maintenance opportunities

[Mike McCaughan]

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.
Mike



________________________________
From: Gradient_task_force <gradient_task_force-bounces at jlab.org> on behalf of Tom Powers <powers at jlab.org>
Sent: Tuesday, February 27, 2024 12:49 PM
To: gradient_task_force at jlab.org <gradient_task_force at jlab.org>; Harshani Senevirathne <iresha at jlab.org>
Subject: Re: [Gradient_task_force] Cavity maintenance opportunities

2, 5 and 8 had 100 ms Quenches back in Sept.  That is an indication of a
multipactor.   They should be pulsed processed.

I don't know why cavity 1 is turned down so low.

I will check recent data for electronic quenches in 1L05 1 and 8 and 100
ms quenches everywhere else in 1L05 later this afternoon.

If you are processing 1 or 8 and the adjacent vacuum valve closes due to
an outburst you should stop doing that cavity so that you lower the risk
of the valve shedding particles.

Tom

On 2/27/2024 12:09 PM, Harshani Senevirathne wrote:
> 1L05-1 and 8.

_______________________________________________
Gradient_task_force mailing list
Gradient_task_force at jlab.org
https://mailman.jlab.org/mailman/listinfo/gradient_task_force
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/gradient_task_force/attachments/20240227/b564afe6/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: C75s-1.7.24.xlsx
Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Size: 12714 bytes
Desc: C75s-1.7.24.xlsx
URL: <https://mailman.jlab.org/pipermail/gradient_task_force/attachments/20240227/b564afe6/attachment-0001.xlsx>