sPHENIX discussion of the superconducting solenoid

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

Hi,

 

Please delay the flow switch checking after the RHIC run is over (in October).    At that time, we had plenty of time to check.

 

I had this “trip” (or quench) counter :

https://docs.google.com/spreadsheets/d/1Uk1WOlLWPDLudvUJB0mV7EmkUOpjvpnpth05YMFrX-8/edit?gid=0#gid=0

 

The last water flow switch problem happened on July 20, 2024, 22:44.

 

I had just brought the magnet back the 2^nd time (due to power dip) last night.  

 

Kin

 

From: Albanese, Marianna <malbanese AT bnl.gov>
Sent: Tuesday, August 27, 2024 10:39 AM
To: Rosas, Pablo J <rosas AT bnl.gov>; Karl, Robert F <rkarl AT bnl.gov>; Yip, Kin <kinyip AT bnl.gov>; Mills, James A <mills AT bnl.gov>; Nagle, James <Jamie.nagle AT colorado.edu>
Subject: Request for Water-Cooled BUS Flow Switch Assessment

 

Good morning sPHENIX team,

 

Rob Karl and I would like to bring a concern to your attention regarding the water-cooled BUS flow switches. The plastic piece inside the flow switch, which diverts the water, has broken off twice recently (once yesterday and once about two weeks ago), resulting in system crashes.

 

To ensure the flow switches are properly sized, we propose conducting a flow check. After discussing with Kin, we understand that shutting down the system requires approximately 2 hours, with an additional 2 hours needed to power it back up.

 

Could you please advise whether we should proceed with a shutdown tomorrow to perform this test? Your decision is crucial to avoid further issues.

 

Thank you for your attention to this matter.

 

Marianna Albanese, PE

Mechanical Engineer II

Collider-Accelerator Department

 

Brookhaven National Laboratory

Bldg. 911, Room 245

Upton, NY  11973

631-344-3839

631-813-8818

malbanese AT bnl.gov