[Esr-users] ESR/Hall C

[Jonathan Creel]

Steve
Was there an alarm for this condition or could one be added so it could 
be detected and corrected sooner? Having the magnets on cold return 
lowers the demand on ESR. The faster this happens the better off the 
other Halls will be following upset conditions. Ever watt counts.

Thanks
J


On 11/27/2017 8:58 AM, Steve Lassiter wrote:
> The SHMS Q2 warm return valve position module faulted and was placed in manual mode. The magnet was isolated during the recovery process over the weekend. The warm return was manually opened this morning and recovery of the magnet has begun. Expect to have Q2 back on cold return today.
>
> Steven
>
>
> ----- Original Message -----
> From: "David Schleeper" <davids at jlab.org>
> To: "Cryo" <esr-users at jlab.org>
> Sent: Monday, November 27, 2017 8:10:58 AM
> Subject: [Esr-users] ESR/Hall C
>
> All,
> Following the trip on 11/25, the Hall C SHMS Q2 remained at or below 6K for several hours.  Since then, all other magnets (SHMS and HMS) have been cooled and are holding liquid.  The SHMS Q2 has warmed to over 40K.  Is this the intention of Hall C personnel? I want to verify that recovering the magnets at this point is not limited by ESR or cryo.  Please advise.
>

-- 
Jonathan Creel
Cryogenics Engineering and Operations Department Head and Senior Electrical Engineer
Thomas Jefferson National Accelerator Facility
12000 Jefferson Avenue, Newport News, Virginia, 23602
Phone (757)269-5925