Commissioning and running of sPHENIX

[Jamie Nagle <jamie.nagle AT colorado.edu>]

Hello  All,

On Tuesday, October 3, 2023 there was a RHIC Coordination Meeting.     To see the slides, one goes to the web page linked below and scrolls all the way to the bottom.     Kin Yip  gave a very good update from sPHENIX and two C-AD  talks gave the current status of  the machine and repairs  (note that a number of repair items have schedules "to be determined").

https://www.c-ad.bnl.gov/esfd/RMEM_24/rhic_planning.htm

Below is a short summary from the meeting sent out by Wolfram Fischer (Chair of C-AD).

Sincerely,

Jamie

All,

 

a short summary of what we discussed today:

 

1.  sPHENIX can run with a crossing angle in p+p implication: electron lenses will not be needed, freeing cryo and PS personnel to concentrate on valve box/DX repair

2.  preparation for p+Au only after all p+p and Au+Au issues are addressed

implication: sPHENIX crossing angle in p+Au will be limited to 1 mrad without DX trim PS upgrade, freeing PS personnel; 

should the opportunity arise all DX magnets will need to be moved during the run

3. no decision yet on Au+Au first (issue: 56 MHz verification), middle (issue: ~1 week reduced p+p performance), or last (issue: heat load)

4.  Collider projections need to be updated

5.  The meeting presentations shall move to an indico site

 

Wolfram

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|| James L. Nagle   
|| Professor of Physics, University of Colorado Boulder

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