sPHENIX discussion of the superconducting solenoid

["Fischer, Wolfram" <wfischer AT bnl.gov>]

Kin and everyone,

 

congratulation on completing this important milestone!

 

Wolfram

 

 

From: "Yip, Kin" <kinyip AT bnl.gov>
Date: Thursday, November 10, 2022 at 11:41
To: "sphenix-magnet-l AT lists.bnl.gov" <sphenix-magnet-l AT lists.bnl.gov>
Cc: "Chan, David" <dchan AT bnl.gov>, "Albanese, Marianna" <malbanese AT bnl.gov>, "Michnoff, Robert J" <michnoff AT bnl.gov>
Subject: Magnet Mapping finally completed successfully !

 

Hi,

 

The last reading of our mapping reading (10 cm, 180 deg.) at 10:46 am --- this morning Nov. 10 --- for the (last) half-field ~10 hour

run (actually 9 hour and 9 minutes).   After confirming with the CERN colleagues (Raphael and Francois), I started ramping down

before 10:51 am. I did the fast discharge at 11:15 am so that CAS and Frank Toldo can lock out the power supply and start opening

the doors.

 

The plan is to help the CERN team to take out the mapper components and pack them out. 

 

On Monday, Pablo Rosas and his CAS colleagues will have one day to further test the Power Supply/Magnet.

 

I was quite nervous in the last few hours, the last hour ... last few minutes.  What if something went wrong ?! ... 🙁   

 

At the end, the Magnet and Power Supply and the quench detector NEVER failed since the CERN Mapper group has arrived !

Though the CERN mapper have given us a few problems during mapping, the CERN colleagues (with the help of our sPHENIX

technicians and CAS to LOTO power supply and open/close the pole-tip doors) have patiently dealt with and solved each problem,

during day, at night, in the weekend etc.   I am glad that we have a happy ending and this long weekend of mine will be very relaxed. 😀

 

Kin