sPHENIX discussion of the superconducting solenoid

["Yip, Kin" <kinyip AT bnl.gov>]

Hi,

 

In the “Installation.pdf” (BaBar procedures) that Jim found a few days, they mentioned vacuum only when they were doing the ‘leak check”/hypot

(and system checks).   No such procedure mentioned.

 

It seems to me that Jim et. al. are just extraordinarily careful in case the vacuuming would change things by 0.0….. mm .

 

Kin

 

From: Anerella, Michael D
Sent: Friday, November 17, 2017 9:45 AM
To: Yip, Kin <kinyip AT bnl.gov>; Orfin, Paul <porfin AT bnl.gov>; Ceruti, Raymond B <rayc AT bnl.gov>; Mills, James A <mills AT bnl.gov>; Hock, Jonathan <jhock AT bnl.gov>
Cc: sphenix-magnet-l AT lists.bnl.gov
Subject: RE: Start insulating vacuum pump down

 

If you tighten supports after you develop vacuum do you loosen them before you dump vacuum?  Is this what SLAC did?

 

 

 

From: sPHENIX-magnet-l [mailto:sphenix-magnet-l-bounces AT lists.bnl.gov] On Behalf Of Yip, Kin
Sent: Friday, November 17, 2017 9:42 AM
To: Orfin, Paul; Ceruti, Raymond B; Mills, James A; Hock, Jonathan
Cc: sphenix-magnet-l AT lists.bnl.gov
Subject: Re: [Sphenix-magnet-l] Start insulating vacuum pump down

 

Hi,

 

Jim just sent me email that they are waiting for you to start pumping down so that they can do the final tightening of the Cryostat supports.

 

Ray already closed the doghouse yesterday as our email(s)  indicated.  Nothing should prevent you from pumping down now.

 

Kin

 

 

------ Original message------

From: Orfin, Paul

Date: Fri, Nov 17, 2017 22:26

To: Ceruti, Raymond B;Mills, James A;Hock, Jonathan;Yip, Kin;

Cc:

Subject:Start insulating vacuum pump down

 

 

All,

 

I want to verify we can start pumping down the insulating vacuum.  We are testing now but would like to leave it on when we are done.

 

 

Thank you,

Paul Orfin
Cryogenic Systems, Collider-Accelerator Department
Brookhaven National Laboratory
Telephone: (631) 344-2899
E-mail: porfin AT bnl.gov

Attachment: Installation.pdf
Description: Installation.pdf