sPHENIX is a new detector at RHIC.

[David Morrison <morrison AT bnl.gov>]

Dear Collaborators,

Thanks to Jin Huang for taking notes at last Friday's general meeting!

Cheers,
Dave and Gunther

sPHENIX collaboration news - Dr. David Morrison (BNL), Prof. Gunther
Roland (MIT)

Coming events:
·       Pre-meetings on June 12 (still to be finalized)
·       Juniors’ pizza and beer social event on June 13 and
collaboration dinner on June 14
·       Institutional board meeting on June 14 – agenda to be circulated
soon
·       AC meeting June 15-16

 Please volunteer speaker or self for sPHENIX speaker for AUM jet workshop

 EC meeting:
·       Jamie Nagle worked up projections for a five-year run plan
(2022-2026).
·       A nominal run plan provides a basis for consistent physics
projections

Purdue, Saclay, CCNU have expressed interest in joining the collaboration.

sPHENIX Project Update - Edward O'Brien (BNL)

Project status
·       Extraordinary Project rate for sPHENIX approved by BNL and BHSO
·       We’re expecting to have the OPC accounts open within the  week
·       Irina has started the weekly meetings with the BNL-supported P6
consultant

Review dates
·       sPHENIX CD-1 “Dry Run” with BNL internal Review committee  (Jun 5-6)
·       sPHENIX MVTX Director’s review (Jul 10-11)
·       sPHENIX Director’s Review. (Aug 2-4)

o   DOE is not sending observer, expect BNL take responsibility
·       DOE-OPA CD-1 Review (Week of Nov 6)

Large (19) set of documents being produced for the CD-1 reviews

Integration Task Force- Dr. Mickey Chiu (Brookhaven National Lab)

Summary: Report completed from the task force to collect all the
pertinent integration information associated with the Inner detectors,
the TPC, INTT, MVTX (formerly MAPS) and Min Bias Detector:
https://docdb.sphenix.bnl.gov/cgi-bin/private/ShowDocument?docid=80

Findings summarized on slide 6-7. Conceptual designs in slides 8+.
Discussions:

·       INTT and MVTX need to be changed to be compatible with each
other. Options under consideration to resolve this issue.

o   Jamie: What setup the length of INTT lines?

o   Tony: active area is set to match |eta|<1 coverage for |z|<10 cm.

·       Clearance of MVTX to beam pipe is tight (1.5 mm radial)

·       Christine/ Mickey: suggest check with compatibility with
fsPHENIX and EIC physics

Forward LOI - . Nils Feege (Stony Brook University), Prof. Christine
Aidala (Michigan)

Summary: Forward instrumentation LOI is being developed.

Physics goals:

·       Study spin-spin and spin-momentum correlations in QCD

·       Search for evidence of gluon saturation

·       Explore early times in A+A collisions

Tracking design:

·       Thin gap chamber is considered as backup option for the outer
tracking region.

·       Suggest contact Saclay to bring possibility of micromegas tracker

·       Conclusion is expand section on backup tracking detector

Preliminary performance plot preview page 9+.

Suggest update style with sPHENIX style macro.

Tracking Update -Dr. Anthony Frawley (Florida State University), Haiwang
Yu (NMSU)

Summary: progress from the taskforce on the new tracking software,
including detailed detector simulation, progressive pattern recognition.

Slide 7: already working well in single track simulations.

Dave: Why efficiency no longer drop in high pT?

Haiwang: working well in low multiplicity environment now as on this
plot. Not yet shown for high multiplicity environment.

Slide 8: significantly improvement in time (8 min) for central HIJING
simulation.

Dave/Tony: much better momentum resolution is produced by this new
tracking software. Also nice progress in expanding number of
collaborators knowing the inner working of the tracking software.

-- 
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