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STAR Experiment

STAR Experiment: Status & Future - Spin Structure of Proton - Properties of QCD Matter at Extreme Conditions - QCD Phase Structure Nu Xu Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley, CA 94720, USA. STAR Experiment. STAR Experiment at RHIC

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STAR Experiment

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  1. STAR Experiment: Status & Future- Spin Structure of Proton - Properties of QCD Matter at Extreme Conditions - QCD Phase Structure Nu Xu Nuclear Science Division Lawrence Berkeley National Laboratory Berkeley, CA 94720, USA

  2. STAR Experiment STAR Experiment at RHIC ( http://www.star.bnl.gov/ ) Fundamental science: particle physics, nuclear physics, astrophysics, cosmology, … State of art technology: detector R&D, simulations, IT, computing, mass/fast data managing, … - 550 scientists - 55 institutes - 13 countries - 130 PhD thesis since 2001

  3. 1) At 200 GeV top energy - Study medium properties, EoS - pQCD in hot and dense medium 2) RHIC beam energy scan (BES) - Search for the QCD critical point - Chiral symmetry restoration STAR Physics Focus Forward program - Study low-x properties, initial condition, search for CGC - Study elastic and inelastic processes in pp2pp Polarized p+p program - Study proton intrinsic properties

  4. STAR Detectors Fast and Full azimuthal particle identification EMC+EEMC+FMS (-1 ≤  ≤ 4) TPC TOF DAQ1000 HFT 2013 FGT 2011 BNL PAC, 21 - 22, 2010 MTD 2013

  5. Particle Identification at STAR TPC ToF TPC STAR TPC K pd π e, μ STAR ToF Log10(p) STAR MTD STAR HFT STAR EMC Neutral particles Strange Jets Heavy Quark hyperons Hadrons Multiple-fold correlations among the identified particles!

  6. HFT: Charm Hadron v2 and RAA • 200 GeV Au+Aum.b. • collisions (500M events). • - Charm hadron collectivity  • drag/diffusion constants  • Medium properties! • Light quark thermalization! • 200 GeV Au+Aum.b. • collisions (|y|<0.5 500M events) • Charm hadron RAA • - Energy loss mechanism! • - QCD in dense medium!

  7. STAR Upgrade Timeline* *Upgrades - Funding driven schedules

  8. DOE New RHIC Performance Milestones spin Heavy ion

  9. The STAR Collaboration - Most European institutions leaving for LHC • The Collaboration is growing from more efforts from BES interests, China and India groups. 1) Frankfurt group: BES 2) GSI heavy ion group:BES, (new?) tracking 3) China HIT heavy ion group: Heavy ion, HBT 4) More students from India groups: 6 additional students, MTD 5) China groups: TOF, HFT, MTD

  10. Decadal Plan see Carl’s talk Charge for new decadal plans for STAR and PHENIXby Steve Vigdor, Dec. 17, 2009http://drupal.star.bnl.gov/STAR/event/2009/12/10/star-management-meetingdue date: Oct. 1, 2010 Decadal Plan C. Gargliardi Spin B. Surrow Heavy Ion J. Dunlop Upgrade F. Videbaek

  11. Charge for new decadal plans for STAR and PHENIX Part-I: Summary of current upgrade and scientific reach, time line A brief summary of the detector upgrades already (or soon to be) in progress, the timelines for completing them, the new science capabilities each adds in combination with upgraded RHIC luminosity, and your best current estimates (informed by the current strawman 5-year run plan for RHIC) of when you will be able to acquire the data that addresses the relevant science goals.  This can even be summarized in tabular form, and should be consistent with the latest RHIC Midterm Plan. The compelling science goals you foresee for RHIC A+A, p+p, and d+A collisions that can only be carried out with additional upgrades (or replacements) of detector subsystems or machine capabilities (e.g., further luminosity or diamond size improvements).  For each such goal, provide some explanation of why RHIC is the appropriate facility (e.g., in competition with LHC or FAIR) to pursue that science, and preferably some simulations that demonstrate the need for new detector or machine capabilities to address the compelling questions. If the pursuit of some science goals is conditional on results to be obtained over the next several years, try to outline the decision points you foresee for deciding future paths.

  12. Charge for new decadal plans for STAR and PHENIX Part-II: Future R&D at RHIC and migration to EIC(?) 3) Prioritized, or at least time-ordered, lists of the major (above $2M total project cost) and more modest (below $2M total project cost) new detector upgrades your Collaboration foresees, together with R&D milestones that may have to be passed to demonstrate their technical feasibility.  Also provide whatever information you have on the indicated timescale concerning probable costs of each upgrade.  I understand these will likely be very preliminary in most cases. 4) Any plans or interest your Collaboration has in adapting your detector or detector subsystems (or detector R&D) to study electron-nucleon and electron-ion collisions with an eventual eRHIC upgrade.  This is relevant only near the end of the decade addressed here, but will be important for planning purposes.  (We may well be forced by financial or environmental considerations, even for a first MeRHIC stage, to consider options in which acceleration of the electron beam is carried out around the RHIC tunnel, requiring some scheme for getting an electron beamline through or around PHENIX and STAR.  So it’s worth considering if there is some way you could make use of the e-p and e-A collisions if we provided them.)

  13. Charge for new decadal plans for STAR and PHENIX Part-III: Evolution of the collaboration 5) The envisioned evolution of your Collaboration through the decade: institutions that may leave, others that might join, any plans to keep your Collaboration healthy and vibrant as RHIC becomes a “mature” facility.

  14. One Possibility • STAR => eSTAR with a moderate upgrade • program (2012 – 2020) • Cost effective for Physics Case and • Detector R&D for EIC • Maintain the community

  15. eRHICDesign eRHIC detector injector 2 SRF linac 1 -> 5 GeV per pass 4 (6) passes Coherent e-cooler RHIC: 325 GeV p or 130 GeV/u Au with DX magnets removed ePHENIX eSTAR

  16. STAR Experiment MTD EMC Barrel MRPC ToFBarrel ALICE Technology EMC End Cap FMS BBC FHC FPD TPC pp2pp’ pp2pp’ PMD trigger computing DAQ1000 COMPLETE HLT HFT FGT Ongoing R&D

  17. The STAR Collaboration - Most European institutions leaving for LHC • The Collaboration is growing from more efforts from BES interests, China and India groups 1) Frankfurt group: BES 2) GSI heavy ion group:BES, (new?) tracking 3) China HIT heavy ion group: Heavy ion, HBT 4) More students from India groups: 6 additional students, MTD 5) China groups: TOF, HFT, MTD Future: • HFT: Thermalization of light quarks • EIC: More effort in the forward rapidity needed • BES: collaboration with SPS, CBM, NICA

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