sPHENIX cold QCD topical group

[David Morrison <morrison AT bnl.gov>]

Hi John,

I had similar thoughts.

I was reminding myself of the compilation of DOE magnet costs that John
Haggerty located back when we imagined we might build our own 2T, small
bore SC magnet for sPHENIX.  That reference is IEEE Transactions on
Applied Superconductivity, VOL. 18, NO. 2, JUNE 2008, Pg. 24.

Superconducting research magnets like an EIC detector might use aren't a
catalog item.  They're very expensive and a lot of trouble to design and
get built, with a lot of attendant risk. Having a magnet that exists and
works can be a great starting point.

Dave



On 10/30/17 1:10 PM, John Lajoie wrote:
> Hi Dave,
> 
>     Just a few comments to get the discussion rolling....
> 
>     I think the issue with the title of the talk on the agenda points
> out the main issue between sPHENIX and the EIC detector community.  The
> fact that it is so easily referred to as "ePHENIX" attaches a label that
> implies that "ePHENIX" is a complete concept, and when people from
> outside sPHENIX start from that point it makes communication and
> discussion difficult at best. It leaves an impression that we are trying
> to push "ePHENIX" from an economic starting point, not necessarily from
> what does the best physics, and it leaves little room for involvement
> outside the sPHENIX collaboration.
> 
>     As you rightly point out, nothing could be further from the truth,
> and we need to fight that impression.  The change in title is a good
> (and necessary) start, but of course you will have to pitch your talk
> carefully as well.  You could take a very extreme view and be very
> explicit that if you were to just take the magnet and flux return (and
> therefore the outer HCAL) and threw away everything else you would have
> a foundation for an EIC detector that would build on the existing
> BNL/DOE investment.  You could then discuss the "EIC detector concept"
> as a strawman, and welcome and encourage other approaches that build on
> the sPHENIX foundation.
> 
>     Just my $0.02.
> 
> John

-- 
David Morrison  Brookhaven National Laboratory  phone: 631-344-5840
                Physics Department, Bldg 510 C    fax: 631-344-3253
                          Upton, NY 11973-5000  email: dave AT bnl.gov