sPHENIX is a new detector at RHIC.

[Eric Mannel <mannel AT bnl.gov>]

John, Martin-

I confirmed with Chi that the oscillator needs to be with in +/-100 
ppm.  I will order parts to make more if we need to change out the 
oscillators.

Eric

On 9/11/2023 1:38 PM, John Haggerty via sPHENIX-l wrote:
> Martin,
>
> I checked into this and confirmed what I saw with the RF group, that 
> for their choice of energy and orbit, the difference between the 6x 
> clock for Au+Au is different from p+p by only about 100 Hz, so our 
> 56.299 MHz crystals should work for either (it's believed we can 
> accommodate ±100 ppm, which would be ~5 kHz.
>
> On 2023-09-10 14:15, Martin Purschke via sPHENIX-l wrote:
>
> > Each species switch will require us to physically change the
> > oscillators in each ADC clockmaster module. We are now set for Au+Au.
> > Starting with pp, we would need to change that, then change back for
> > Au+Au. The in-the-middle scenario adds yet one more switch. With 3
> > trained people I would guess this will take about 1.5 days including
> > all tests.
>
> > On 9/10/23 09:14, Perepelitsa, Dennis via sPHENIX-l wrote:
> > > Dear sPHENIX colleagues,
> > >
> > > As you may know, the Quark Matter conference last week is 
> > > immediately followed by the NPP PAC meeting on Monday morning, where 
> > > sPHENIX will give an update and present our Beam Use Proposal.
> > >
> > > I have prepared a draft set of slides for the BUP part of the 
> > > presentation here: 
> > > https://indico.bnl.gov/event/20316/contributions/79800/attachments/49195/84844/dvp-PAC-9-11-23-DRAFT-1.pdf 
> > > <https://indico.bnl.gov/event/20316/contributions/79800/attachments/49195/84844/dvp-PAC-9-11-23-DRAFT-1.pdf> (note 
> > > that a summary of commissioning is given in a separate talk by Dave)
> > >
> > > I would be happy for any comments over the course of today.
> > >
> > > Dennis
> > >
> > > Dennis V. Perepelitsa
> > > Associate Professor, Physics Department
> > > University of Colorado Boulder
> > >
> > >
> > > _______________________________________________
> > > sPHENIX-l mailing list
> > > sPHENIX-l AT lists.bnl.gov
> > > https://lists.bnl.gov/mailman/listinfo/sphenix-l
>
> ---
> John Haggerty
> haggerty AT bnl.gov
> cell: 631 741 3358
> _______________________________________________
> sPHENIX-l mailing list
> sPHENIX-l AT lists.bnl.gov
> https://lists.bnl.gov/mailman/listinfo/sphenix-l

--
Eric J. Mannel, Ph.D.
Research Engineer
Dept of Physics/PHENIX
Brookhaven National Laboratory
631/344-7626 (Office)
914/659-3235 (cell)