[Esr-users] Hall A heat bubble causing disruption for ESR

[Joe D. Wilson, Jr]

The CLOG entry below has plot of the temperature bump from Hall A in
comparison to other halls.

https://logbooks.jlab.org/entry/3512279

-----------------
Joe D. Wilson, Jr.
Cryogenic Operations Engineer

Jefferson Lab
www.jlab.org
757-269-7722
jwilson at jlab.org


-----Original Message-----
From: Esr-users [mailto:esr-users-bounces at jlab.org] On Behalf Of Jessie
Butler
Sent: Saturday, January 13, 2018 10:46 AM
To: Christopher Perry <cperry at jlab.org>
Cc: esr-users at jlab.org
Subject: Re: [Esr-users] Hall A heat bubble causing disruption for ESR

The IOC for the right HRS in Hall A lost communication and was likely the
cause of this issue. We have since rebooted the IOC and brought the right
arm back online. We currently don't know what caused the IOC to lock-up but
we (Jack, Andrew & Jessie) are still investigating it... All Hall A magnets
have returned to normal liquid levels and lead flows. Sorry for the
inconvenience. 

Thanks,

Jessie Butler
Jefferson Lab
Physics/Hall-A Work Coordinator
757-269-5544 

EXCELLENCE IS OUR STANDARD;
PERFECTION IS OUR GOAL.

----- Original Message -----
From: "Christopher Perry" <cperry at jlab.org>
To: esr-users at jlab.org
Sent: Saturday, January 13, 2018 7:02:45 AM
Subject: [Esr-users] Hall A heat bubble causing disruption for ESR

It looks like Right D1 at Hall A may have quenched (see attached
graph)causing a heat bubble to return to ESR, which disrupted liquid levels
in the other halls.  All liquid levels are recovering with the exception of
the right dipole.

Chris Perry
Mechanical Engineer
Cryogenics Group
Thomas Jefferson National Accelerator Facility
12000 Jefferson Ave, Newport News, VA 23606 cperry at jlab.org
(757) 269-6157

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