Long-term Detector Upgrade Plans for RHIC and eRHIC Jin Huang Brookhaven National Lab ● Motivation ● PHENIX ● STAR ● eRHIC Detectors ● ACKNOWLEDGEMENTS • PHENIX Collaboration • STAR Collaboration • BNL EIC Task Force • BNL CA-D department 23RD CONFERENCE ON APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY
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Long-term Detector Upgrade Plans for RHIC and eRHIC
23rd Conference on Application of Accelerators in Research and Industry. Long-term Detector Upgrade Plans for RHIC and eRHIC. ● Motivation ● PHENIX ● STAR ● eRHIC Detectors ● . Jin Huang Brookhaven National Lab. Acknowledgements . PHENIX Collaboration STAR Collaboration - PowerPoint PPT Presentation
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Long-term Detector Upgrade Plans for RHIC and eRHIC
Jin HuangBrookhaven National Lab
● Motivation ● PHENIX ● STAR ● eRHIC Detectors ●
ACKNOWLEDGEMENTS • PHENIX Collaboration• STAR Collaboration• BNL EIC Task Force• BNL CA-D department
23RD CONFERENCE ON APPLICATION OF ACCELERATORS IN RESEARCH AND INDUSTRY
Relativistic Heavy Ion Collider (RHIC)◦ The most versatile hadron collider in the world,
and world’s first and only spin-polarized proton collider◦ Two running experiments as of today
Pioneering High Energy Nuclear Interaction eXperiment (PHENIX) Solenoidal Tracker At RHIC (STAR)
Recent Heavy Flavor Tracker upgrade, see talk NP08/322 J. Schambach 2017-2025: RHIC with upgraded capability
◦ Comprehensive upgrade of PHENIX detector by reusing the BaBar Solenoidal magnet: sPHENIX and fsPHENIX Central detector upgrade, see talk NP08/356, A. Franz
◦ STAR plans a series of detector upgrade in the forward-looking direction 2025+: BNL envisions of a high luminosity spin-polarized electron ion collider (EIC),
eRHIC◦ Three studies of possible detectors for eRHIC◦ Continue upgrade paths for PHENIX and STAR lead to EIC detectors◦ A purpose-built detector to fully optimize for EIC physics
CAARI 2014
Overview
Strong interest in EIC in the nuclear physics community also shown in next talk, an EIC envisioned by Jefferson Lab: NP08/433, P. Turonski
Search for QCD critical point and onset of deconfinement→ STAR detector with upgraded TPC is well suited for this study
Detailed study using strongly interacting Quark Gluon Plasma (QGP) using jet observables and heavy flavor quarks→ Jet detection in the central rapidity→ Tagging of heavy flavor quark production with lepton ID and displaced vertex
Understand the mystery of large transverse spin asymmetry in hadron collisions, spin puzzle of proton, property of cold nuclear matter→ Jet detection in the forward-looking directions and hadron distribution within jets, jet correlations→ Drell-Yan -> lepton pair, W/Z -> lepton and direct photon ID
RHIC in 2017-2025: driving physics goals and requirements on detection capabilities
Quark and gluons inside spin-polarized protons
Big Bang in the UniverseSmall bang at RHIC and formation of Quark Gluon Plasma
The compelling question: How are the sea quarks and gluons, and their spins, distributed in space and momentum inside the nucleon?
Deliverable measurement using polarized electron-proton collisions◦ The longitudinal spin of the proton, through Deep-Inelastic Scattering
(DIS)◦ Transverse motion of quarks and gluons in the proton, through Semi-
Inclusive Deep-Inelastic Scattering (SIDIS)◦ Tomographic imaging of the proton, through Deeply Virtual Compton
Scattering (DVCS) Leading detector requirement:
◦ Good detection and kinematic determination of DIS electrons◦ Momentum measurement and PID of hadrons◦ Detection of exclusive production of photon/vector mesons and
scattered proton◦ Beam polarimetry and luminosity measurements
CAARI 2014
Physics goals: nucleon as a laboratory for QCDOutlined in EIC white paper, arXiv:1212.1701
The compelling questions: ◦ Where does the saturation of gluon densities set in?◦ How does the nuclear environment affect the
distribution of quarks and gluons and their interactions in nuclei?
Deliverable measurement using electron-ion collisions◦ Probing saturation of gluon using diffractive process and
correlation measurements◦ Nuclear modification for hadron and heavy flavor
production in DIS events; probe of nPDF◦ Exclusive vector-meson production in eA
Leading detector requirement:◦ ID of hadron and heavy flavor production ◦ Large calorimeter coverage to ID diffractive events◦ Detection/rejection of break-up neutron production in
eA collisions
CAARI 2014
Physics goals: nucleus as a laboratory for QCDOutlined in EIC white paper, arXiv:1212.1701
Details in Talk NP08 # 356, Achim Franz (BNL) sPHENIX: major upgrade to the PHENIX experiment Physics Goals: detailed study QGP using jets and heavy quarks at RHIC energy region Baseline consists of new large acceptance EMCal+HCal built around recently acquired
BaBar magnet. Additional tracking also planned MIE submitted to DOE
Strong support from BNLDOE scientific review in July 2014
A good foundationfor future detector upgrade
The sPHENIX detector
Baseline detectors for sPHENIXsPHENIX MIE, http://www.phenix.bnl.gov/plans.html
Shared detector with future eRHIC program and deliver an unique forward program with RHIC’s pp/pA collision
white paper submitted to BNL in Apr 2014: http://www.phenix.bnl.gov/plans.html
CAARI 2014
Forward spectrometer of sPHENIX: fsPHENIXFor forward detection in RHIC pp/pA collisions
Single jet in GEANT4pT = 4.1 GeV/c, eta = 3
ePHENIX GEM + H-Cal→ Forward jet with charge sign tagging→ Unlock secrets of large AN in hadron collisions+ reuse current silicon tracker & Muon ID detector→ polarized Drell-Yan with muons → Critical test of TMD framework+ central detector (sPHENIX)→ Forward-central correlations → Study cold nuclear matter in pA
Strong fringe field unavoidableTuned yoke → magnetic field line most along track within the RICH volume → very minor ring smearing due to track bending
Reached good hadron ID to high energy
r
A RICH Ring:Photon distribution due to tracking bending only
R
DispersionΔR <2.5 mrad
R < 52 mrad for C4F10
RICH
EMCal
η~1
η~4
Aerogel track
Purit
y
PID purity at η=4 (most challenging region w/ δp)
Ring radius ± 1σ field effect for worst-case region at η~+1
Integration of detector to eRHICCourtesy: E.C. Aschenauer (BNL), A.Kiselev (BNL), DIS2014
An eRHIC IR design by Brett Parker (BNL)
Collisionpoint outgoing p/A
incoming e -
For |z|<4.5m, machine-element free region for detectors For shared region: close collaboration between BNL EIC taskforce and
Collider-Accelerator Department with on-going studies:◦ Roman Pots ◦ Zero Degree Calorimeter ◦ Low Q2 tagger◦ Luminosity detector◦ Electron polarimeter ◦ IP12: Hadron beam
polarimeter
A parallel study on MEICto reach same physics goal:NP08/433, P. Turonski
RHIC and eRHIC: unique facilities to study QCD origin of the universe and the world around us
Long term upgrade planed by both PHENIX and STAR collaborations to fully explore physics potential of RHIC◦ PHENIX: comprehensive upgrade of detectors built upon recently acquired BaBar
super conducting coil◦ STAR: strengthens forward-looking detection capabilities
Studies of possible eRHIC detectors◦ BaBar magnet and sPHENIX as foundation for an eRHIC detector◦ STAR → eSTAR◦ A purpose-built detector◦ IR design on-going◦ Active detector R&D program for EIC:
https://wiki.bnl.gov/conferences/index.php/EIC_R%25D Exciting and abundant opportunities for innovation and collaboration