[Esr-users] LN2 to Hall C

[Steve Lassiter]

Hi Chris, 

Many thanks to you and cryo for this. 

Steven 

----- Original Message -----

From: "Christopher Perry" <cperry at jlab.org> 
To: "Steve Lassiter" <lassiter at jlab.org> 
Cc: "esr-users" <esr-users at jlab.org> 
Sent: Tuesday, May 15, 2018 9:25:22 AM 
Subject: Re: [Esr-users] LN2 to Hall C 

Steve, 
We began pumping on the transferline vacuum yesterday, the pressure had gone up almost to atmospheric and took some time time to pump down. We needed to isolate our pumps overnight with pressure in the single digit Torr. This morning we continued pumping on the vacuum and now the pressure is down into the 10^-3 Torr range. You should start to see your situation improve. 

-Chris 

----- Original Message ----- 
From: "Steve Lassiter" <lassiter at jlab.org> 
To: "Cryo" <esr-users at jlab.org> 
Sent: Tuesday, May 15, 2018 8:39:05 AM 
Subject: [Esr-users] LN2 to Hall C 

Hi, 

LN2 temperature coming into hall C is at 261K. The Transfer line insulating vacuum requires attention. 
Hall C magnets temperatures are rising above 80K, with a few above 100K. 

Need cold LN2 to operate the HXs. 

Steven 

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