RHIC II

1
RHIC II Scope, Strategy, Plans
T. Ludlam RHIC II Spin Physics Workshop Oct. 7,
2005
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Gold Ion Collisions in RHIC
Beam Energy 100 GeV/u
RHIC
9 GeV/u Q 79
BOOSTER
AGS
1 MeV/u Q 32
3
RHIC polarized proton accelerator complex
RHIC pC Polarimeters
Absolute Polarimeter (H? jet)
BRAHMS
PHOBOS
Siberian Snakes
Siberian Snakes
PHENIX
STAR
Spin Rotators (longitudinal polarization)
Spin flipper
Spin Rotators (longitudinal polarization)
Solenoid Partial Siberian Snake
Pol. H- Source
LINAC
BOOSTER
Helical Partial Siberian Snake
AGS
200 MeV Polarimeter
AGS Internal Polarimeter
Rf Dipole
AGS pC Polarimeters
Strong Helical AGS Snake
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The Long Term Vision RHIC as a QCD Laboratory
Facility upgrades EBIS funded for FY 06
start Detector upgrades first steps
underway RHIC II luminosity upgrade --
e-cooling eRHIC
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The Evolution of RHIC

• Processes are in place with the community to
  refine and articulate the science goals
• RHIC II Science Workshops (like this one)
• eRHIC Workshops (led by A. Deshpande)
• Budget issues dominate in the short term
• It is up to us to make the case in the NP
  community!
• i.e. the next Nuclear Physics Long Range Plan

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The Science Driving RHIC Upgrades

• QCD at high temperature and density What is
  the physics of superdense, strongly-interacting
  matter?
• QCD at high energy and low x What is the
  physics of strong color fields?
• QCD and the structure of hadrons What is the
  origin of nucleon spin?

• Fundamental questions for experiment
• Properties of QGPsQGP
• Thermalization
• Deconfinement
• Connections with E-M plasma properties
• Properties of gluonic matter
• Gluon spin in the nucleon
• Polarization of the quark sea
• Transverse spin in QCD

Key Observables
Crucial measurements Compelling new
insights Unique opportunities
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A Long Term Strategic View
2012
2008
RHIC II Construction
RHIC
Luminosity Det. upgrade
Short term upgrades
eRHIC Constr.
Midterm Upgrades
E beam new detector
RHIC Spin
LHC Heavy Ion
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Future plans for RHIC Machine PerformanceTh.
Roser

• Machine goals for next few years with upgrades in
  progress
• Enhanced RHIC luminosity (112 bunches, b 1m)
• Au Au 8 ? 1026 cm-2 s-1 (100 GeV/nucleon)
  
• For protons also 2 ? 1011 protons/bunch (no IBS)
• p? p? 60 ? 1030 cm-2 s-1 70 polarization
  (100 GeV) 150 ? 1030 cm-2 s-1 70 polarization
  (250 GeV)(luminosity averaged over store
  delivered to 2 IRs)
• EBIS low maintenance linac-based pre-injector
  all species incl. U and pol. He3. Funded in FY
  2006 Operational in 2010
• RHIC II luminosity upgrade e-cooling, 10 ? more
  luminosity. RD in progress

2? achieved
6? achieved
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RHIC Luminosity Upgrade with Electron Cooling

• Gold collisions (100 GeV/n x 100 GeV/n) w/o
  e-cooling with e-cooling
• Emittance (95) pmm 15 ? 40 15 ? 3
• Beta function at IR m 1.0 1.0 ? 0.5
• Number of bunches 112 112
• Bunch population 109 1 1 ? 0.3
• Beam-beam parameter per IR 0.0016 0.004
• Ave. store luminosity 1026 cm-2 s-1 8 70
• Pol. Proton Collision (250 GeV x 250 GeV)
• Emittance (95) pmm 20 12
• Beta function at IR m 1.0 0.5
• Number of bunches 112 112
• Bunch population 1011 2 2
• Beam-beam parameter per IR 0.007 0.012 ?
• Ave. store luminosity 1032 cm-2 s-1 1.5 5.0

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Electron-Ion Collider at RHIC eRHIC

• 10 GeV, 0.5 A e-ring with 1/3 of RHIC
  circumference (similar to PEP II HER)
• 10 GeV electron beam ? s1/2 for e-A 63 GeV/u
  s1/2 for e?-p? 100 GeV
• Electron cooling required for high luminosity e-A
  and low energy e-p collisions
• Polarized e-He3 (e-n) collisions with EBIS
• Existing RHIC interaction region allows for
  typical asymmetric detector
• Luminosity up to 1 ? 1033 cm?2s?1 per nucleon (1
  ? 1034 cm?2s?1 with linac ring scheme)

BNL, MITcollaboration
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STAR Upgrades
DAQ and TPC-FEE upgrade
Full Barrel Time-of-Flight system
Forward Meson Spectrometer
Magnet
Barrel EMC End Cap EMC
Beam-Beam Counters
Forward po Det.
TPC
ZDC
VPDs (TOF Start)
Photon Mult. Det.
Forward triple-GEM EEMC tracker
FTPCs
Integrated Tracking Upgrade
Forward silicon tracker
HFT pixel detector
Barrel silicon tracker
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The Upgraded PHENIX Detector
Charged Particle Tracking Drift Chamber Pad
Chamber Time Expansion Chamber/TRD Cathode Strip
Chambers(Mu Tracking) Forward Muon Trigger
Detector Si Vertex Tracking Detector- Barrel
(Pixel Strips) Si Vertex Endcap
(mini-strips) Particle ID Time of Flight Ring
Imaging Cerenkov Counter TEC/TRD Muon ID
(PDTs) Aerogel Cerenkov Counter Multi-Resistive
Plate Chamber Time of Flight Hadron Blind
Detector Calorimetry Pb Scintillator Pb
Glass Nose Cone Calorimeter Event
Characterization Beam-Beam Counter Zero Degree
Calorimeter/Shower Max Detector Forward
Calorimeter Data Acquisition DAQ Upgrade

• Detector Redundancy
• Fine Granularity, Mass Resolution
• High Data Rate
• Good Particle ID
• Limited Acceptance

Charged Particle Tracking Drift Chamber Pad
Chamber Time Expansion Chamber/TRD Cathode Strip
Chambers(Mu Tracking) Particle ID Time of Flight
Ring Imaging Cerenkov Counter TEC/TRD Muon ID
(PDTs) Aerogel Cerenkov Counter Calorimetry Pb
Scintillator Pb Glass Event Characterization Mult
iplicity Vertex Detector (Si Strip,Pad) Beam-Beam
Counter Zero Degree Calorimeter/Shower Max
Detector Forward Calorimeter
SMD/
FCAL
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RHIC Upgrades Overview
Upgrades High T QCD. QGP Spin Low-x
PHENIX ee- heavy jet quarkonia flavor tomog. W ?G/G
Hadron blind detector Vertex Tracker Muon Trigger Forward cal. (NCC) X X X O O O O O X X O O X
STAR
Time of Flight (TOF) MicroVtx (HFT) Forward Tracker Forward Cal (FMS) DAQ 1000 O X O X X O O X X X O O O O X O
RHIC Luminosity O O X X O O O
X upgrade critical for success O upgrade
significantly enhances program
A. Drees 4/4/05
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Detector Upgrades Timeline Mid-Term Strategy
presently under discussion
FY 2006 FY 2007 FY 2008 FY 2009 FY 2010 FY 2011 FY 2012
High statistics Au Au 500 GeV Spin Runs
TOF and VTX construction Muon trigger
Small upgrades HBD, FMS, DAQ
Mid-Term upgrades
PHENIX NCC, FVTX STAR HFT Inner Tracker
RHIC II construction
RHIC Detector RD
LHC Heavy Ion Program
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The Output from these Workshops
RHIC II Science Whitepaper A study of physics
opportunities for the coming decade
Overview and conclusions-- drawn from Working
Group Reports -writing committee-

• What are the Critical Measurements?
• What compelling new insights will these
  measurements bring to our understanding of
  fundamental issues of broad scientific interest?

• Of these measurements, which ones require
  detector and/or collider upgrades? Which ones
  could be uniquely addressed at RHIC in the LHC
  era?
• What unique scientific opportunities would be
  lost if RHIC were not upgraded?
• The arc from RHIC to RHIC II to eRHIC

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Time Scale

• Workshop November 11-12 at BNL
• final results from Working Groups
• Writing Committee in place
• Lay out document with Working Group convenors
• Coordinate with PAC Meeting
• preliminary reports to PAC Nov. 3-4

• Aim to complete the White Paper document by
  February 2006
• This puts it in play for the FY 2008 budget
  cycle
• Starting point for 2007 Long Range Plan document