sPHENIX discussion of the superconducting solenoid

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

Eric, Thanks for the reply .  

Hopefully, there is less burping now ... I haven't gone there to check as I am stuck in the sPHENIX meeting.

Kin

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

From: "O'Connor, Eric" <eoconnor1 AT bnl.gov>

Date: 12/12/22 11:11 AM (GMT-05:00)

To: "Orfin, Paul" <porfin AT bnl.gov>, "Sheth, Chintan" <csheth AT bnl.gov>, "Yip, Kin" <kinyip AT bnl.gov>

Cc: "Than, Yatming (Roberto)" <ythan AT bnl.gov>, "Van Kuik, Brian" <vankuik AT bnl.gov>

Subject: RE: Gas or air release every 10-15 seconds ?

Paul and Kin,

 

We all spoke about a course of action for this issue. We switched operational mode from simultaneous to off – everything is closed now and will observe to see if V1A vacuum levels increase to indicate if there is a leak or not if it should reach E-02 for instance. The system will continue burping here and there until it warms up more.

 

Kin,

 

The housing with the solenoid inside from that picture you sent does have an air leak that has been known since September, but it is not a vacuum leak. The air hissing noise every 10-15 seconds was from the cycling of the valve every time air is supplied to close the valve.

 

Brian and I will continue monitoring and provide updates, as necessary.

 

Thank you

 

Regards,

 

Eric O’Connor

Associate Staff Engineer

Cryogenic Systems, Collider-Accelerator Department

Brookhaven National Laboratory

Telephone: (631) 344-8952

Cell: (631) 546-8842

E-mail: eoconnor1 AT bnl.gov

 

 

 

 

From: Orfin, Paul <porfin AT bnl.gov>
Sent: Monday, December 12, 2022 8:42 AM
To: Sheth, Chintan <csheth AT bnl.gov>; O'Connor, Eric <eoconnor1 AT bnl.gov>
Cc: Than, Yatming (Roberto) <ythan AT bnl.gov>
Subject: FW: Gas or air release every 10-15 seconds ?

 

All,

 

This sounds like the issue I brought up back on Tuesday.  I thought someone looked at this issue?

 

I’m not sure what state the vacuum system is in but consider leaving it in a manual mode with either the turbo on or off.  This excessive cycling will not be good on those V1 valves. 

 

Thank you,

Paul Orfin

Deputy Directorate Chief Operating Officer
Brookhaven National Laboratory

 

From: sPHENIX-magnet-l <sphenix-magnet-l-bounces AT lists.bnl.gov> On Behalf Of Yip, Kin
Sent: Friday, December 9, 2022 5:21 PM
To: O'Connor, Eric <eoconnor1 AT bnl.gov>; sphenix-magnet-l AT lists.bnl.gov
Subject: [Sphenix-magnet-l] Gas or air release every 10-15 seconds ?

 

Dear Roberto and Chintan and all,

 

I don't go to 1008-IR as often as I used to a month ago.  

 

Today, as I told you over the phone, I heard the noise from the upper platform every 10-15 seconds or so.  After our phone call, I walked up the platform and chased the noise to this piece of Cryo equipment.  I am sure it's this because I felt the release of gas/air with my hand, in addition to the noise.  Somebody wrote "leaking" in red.

 

I don't remember hearing this during magnet mapping.  Is this OK ?  Something broken ?

 

We are not doing any cooling any more.  Why is it doing this ?

( Technicians told me that it has been like that for some time. It may stop in the morning and then will happen again in the evening. )

 

Kin