[Esr-users] ESR load

[Dave Kashy]

Hi All,
It looks like sometime between 10am and 1pm today the TL from CHL to ESR was isolated, and if one looks at the cryo averages the Dewar is filling at ~1.5g/s at present.

The data taken on 11/13/2017 by David Schleeper and I indicated that w/o the TL and with all the magnets on line, but w/o lead flow on 3 HMS quads ESR could fill the dewar at 0.8g/s  see pag1 of this: https://userweb.jlab.org/~kashy/ESR%202/ESR_2_Meeting_May29_2018/Physics%20Division%20Cryo%20Report%203%20Rev-%20Present%20and%20Future%20Cryogenic%20Loads%20in%20Halls.pdf


It has only been a few hours, but it may be that ESR is holding the load with a small amount of margin. We should know more tomorrow.

Thanks All,
Dave


----- Original Message -----
From: "Dave Meekins" <meekins at jlab.org>
To: "Jessie Butler" <jbutler at jlab.org>
Cc: "esr-users" <esr-users at jlab.org>
Sent: Tuesday, September 11, 2018 2:10:11 PM
Subject: Re: [Esr-users] ESR load

Hi Jessie, 

FYI Hall is back open for business as usual. 

David Meekins 
Staff Scientist 
Thomas Jefferson National Accelerator Facility 
12000 Jefferson Ave 
Newport News Va. 23606 

Office: 757-269-5434 
Cell: 757-968-9076 


From: "Jessie Butler" <jbutler at jlab.org> 
To: "norton" <norton at jlab.org> 
Cc: esr-users at jlab.org 
Sent: Tuesday, September 11, 2018 2:01:25 PM 
Subject: Re: [Esr-users] ESR load 

Afternoon, 

Hall A status is in a good state. Liquid are full and regulating, LN2 is good and power supplies are off. Robert is reducing our lead flow on his end because the Hall is inaccessible do to the tritium handling that's currently taken place. Once the Hall re-opens, I will go down and check vacuums and verify they are still good. 

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

EXCELLENCE IS OUR STANDARD; 
PERFECTION IS OUR GOAL. 

----- Original Message ----- 
From: "Robert Norton" <norton at jlab.org> 
To: esr-users at jlab.org 
Sent: Tuesday, September 11, 2018 11:24:58 AM 
Subject: [Esr-users] ESR load 

Good morning, 

We are seeing that even with ESR at full power, the plant can't seem to 
keep up with the current load without assistance from the CHL-ESR 4K 
transferline. 

If there are any unneeded liquefaction loads from 4K to warm-return, we 
would like to minimize them at this time. Please check and respond back 
if you can. 


Thank you for your time, and have a wonderful day and a safe week. 


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