ERHIC Conceptual Design V.Ptitsyn, J.Beebe-Wang, I.Ben-Zvi, A.Fedotov, W.Fischer, Y.Hao, V.N. Litvinenko, C.Montag, E.Pozdeyev, T.Roser, D.Trbojevic.

Slides:



Advertisements
Similar presentations
Beam Dynamics in MeRHIC Yue Hao On behalf of MeRHIC/eRHIC working group.
Advertisements

Study of the Luminosity of LHeC, a Lepton Proton Collider in the LHC Tunnel CERN June F. Willeke, DESY.
Merminga, LRP2007, Jan e + p/A Facilities Lia Merminga Center for Advanced Studies of Accelerators Jefferson Laboratory January 12-14, 2007.
Note: most of the slides shown here are picked from CERN accelerator workshops. Please refer to those workshop for further understanding of the accelerator.
1 LHeC Considerations for a Lepton Hadron Collider Option for the LHC F. Willeke, BNL The 4th Electron Ion Collider Workshop Hampton University,
4 th EIC Workshop Hampton University, VA Richard Milner 1 Electron-Ion Collider Accelerator Workshop Summary and Outlook EIC biennial meeting Hampton,
ERHIC design status V.Ptitsyn for the eRHIC design team.
Recirculating pass optics V.Ptitsyn, D.Trbojevic, N.Tsoupas.
Luminosity Prospects of LHeC, a Lepton Proton Collider in the LHC Tunnel DESY Colloquium May F. Willeke, DESY.
ERHIC Main Linac Design E. Pozdeyev + eRHIC team BNL.
V.N. Litvinenko, ElC Collaboration Meeting, Hampton University, May, 2008 Staging of eRHIC Increased Reach in c.m. Energy and Luminosity Vladimir.
Beam-beam studies for eRHIC Y. Hao, V.N.Litvinenko, C.Montag, E.Pozdeyev, V.Ptitsyn.
MeRHIC Design V.Ptitsyn on behalf of MeRHIC Design team: M. Bai, J. Beebe-Wang, I. Ben-Zvi, M. Blaskiewicz, A. Burrill, R. Calaga, X. Chang, A. Fedotov,
Electron and Ion Spin Dynamics in eRHIC V. Ptitsyn Workshop on Polarized Sources, Targets and Polarimetry Charlottesville, VA, 2013.
Thomas Roser RHIC Open Planning Meeting December 3-4, 2003 RHIC II machine plans Electron cooling at RHIC Luminosity upgrade parameters.
Brain Gestorme: Status of the LHeC Ring-Ring / Linac- Ring Basic Parameters I appologise to talk about things you already know...
Peter Paul 12/16/06e-A Collider concept1 Brief History of the e-A Collider Concept Peter Paul BNL/SBU.
1 QM2006 D.I.Lowenstein RHIC : The Path Forward Presented to Quark Matter 2006 Shanghai, PRC Derek I. Lowenstein Brookhaven National Laboratory November.
ERHIC ZDR Design V.Ptitsyn. Detailed document (265 pages) reporting studies on the accelerator and the interaction region of this future collider. The.
18 th International Spin Physics Symposium Polarized Beams at EIC V. Ptitsyn.
Thomas Roser EIC collaboration workshop MIT, April 6, 2007 eRHIC Design eRHIC Schemes R&D Items Cost and Schedule.
Emittance Growth from Elliptical Beams and Offset Collision at LHC and LRBB at RHIC Ji Qiang US LARP Workshop, Berkeley, April 26-28, 2006.
Overview Run-6 - RHIC Vadim Ptitsyn C-AD, BNL. V.Ptitsyn RHIC Spin Workshop 2006 RHIC Run-6 Timeline  1 Feb – Start of the Run-6. Start of the cooldown.
Beam dynamics on damping rings and beam-beam interaction Dec 포항 가속기 연구소 김 은 산.
October 4-5, Electron Lens Beam Physics Overview Yun Luo for RHIC e-lens team October 4-5, 2010 Electron Lens.
Operated by JSA for the U.S. Department of Energy Thomas Jefferson National Accelerator Facility EIC Collaboration Meeting, Hampton University, May 19-23,
MEIC Staged Cooling Scheme and Simulation Studies He Zhang MEIC Collaboration Meeting, 10/06/2015.
CASA Collider Design Review Retreat HERA The Only Lepton-Hadron Collider Ever Been Built Worldwide Yuhong Zhang February 24, 2010.
Thomas Jefferson National Accelerator Facility Newport News, Virginia, USA ELIC: A HIGH LUMINOSITY AND EFFICIENT SPIN MANIPULATION ELECTRON-LIGHT ION COLLIDER.
Page 1 An lepton energy-recovery-linac scalable to TeV Vladimir N. Litvinenko Stony Brook University, Stony Brook, NY, USA Brookhaven National Laboratory,
Beam-Beam and e-Cloud in RHIC Oct. 6, 2015 Haixin Huang, Xiaofeng Gu, Yun Luo.
UMass Amherst Christine Aidala Jacksonville, FL Measuring the Gluon Helicity Distribution at a Polarized Electron-Proton Collider APS April Meeting 2007.
ERHIC with Self-Polarizing Electron Ring V.Ptitsyn, J.Kewisch, B.Parker, S.Peggs, D.Trbojevic, BNL, USA D.E.Berkaev, I.A.Koop, A.V.Otboev, Yu.M.Shatunov,
2009 RHIC & AGS Annual Users' Meeting June eRHIC Conceptual Design V. Ptitsyn, J. Beebe-Wang, I. Ben-Zvi, A. Burril, R. Calaga, H. Hahn, A. Fedotov,
ERHIC design status V.Ptitsyn for the eRHIC design team.
Thomas Roser EIC AC meeting November 3-4, 2009 EIC Accelerator R&D Strategy and Programs Thomas Roser/Andrew Hutton BNL / Jefferson Lab R&D program is.
Beam-Beam effects in MeRHIC and eRHIC Yue Hao Collider-Accelerator Department Brookhaven National Laboratory Jan 10, 2009 EIC Meeting at Stony Brook.
1 V. N. Litvinenko, 1st ECFA-CERN LHeC Workshop, Divonne-les-Bains, France, September 2, Vladimir N. Litvinenko Collider-Accelerator Department,
Crossing transition at RHIC V.Ptitsyn, N.Abreu, M. Brennan, M.Blaskiewicz, W. Fischer, C. Montag, R. Lee, S.Tepikian.
09-21 Study of bunch length limits Goals: To identify and observe effects which put limits on the minimum bunch length in RHIC. Try to distiguish the limitation.
F. Willeke, Snowmass Luminosity Limitations of e-p Colliders Extrapolation from HERA Experience Examples for IR Layout LINAC-Ring Limitations HERA.
Beam Physics Issue in BEPCII Commisionning Xu Gang Accelerator physics group.
MeRHIC Internal Cost Review October, Dmitry Kayran for injector group MeRHIC Internal Cost Review October 7-8, 2009 MeRHIC: Injection System Gun.
1 RHIC II – Ion Operation Wolfram Fischer RHIC II Workshop, BNL – Working Group: Equation of State 27 April 2005.
Bob Lambiase May 21, The purpose of eRHIC is to have the capability to collide heavy ions with leptons, such as electrons and polarized electrons.
Polarized Proton at RHIC: Status and Future Plan Mei Bai Collider Accelerator Dept. BNL A Special Beam Physics Symposium in Honor of Yaroslav Derbenev's.
Beam-beam Simulation at eRHIC Yue Hao Collider-Accelerator Department Brookhaven National Laboratory July 29, 2010 EIC Meeting at The Catholic University.
1 Machine issues for RHIC II Wolfram Fischer PANIC Satellite Meeting – New Frontiers at RHIC 30 October 2005.
P OSSIBILITIES FOR MAINTAINING AA AND PP CAPABILITIES IN PARALLEL WITH E RHIC V. Ptitsyn Collider-Accelerator Department BNL RHIC and AGS Users Meeting,
BINP tau charm plans and other projects in Turkey/China A. Bogomyagkov BINP SB RAS, Novosibirsk.
EC plans in connection with eRHIC Wolfram Fischer ILCDR08 – Cornell University, Ithaca, New York 10 July 2008.
eRHIC Design and R&D From RHIC to eRHIC
Beam-beam effects in eRHIC and MeRHIC
Explore the new QCD frontier: strong color fields in nuclei
Large Booster and Collider Ring
Beam-beam R&D for eRHIC Linac-Ring Option
An lepton energy-recovery-linac scalable to TeV Vladimir N
eRHIC with Self-Polarizing Electron Ring
A brief Introduction of eRHIC
CASA Collider Design Review Retreat Other Electron-Ion Colliders: eRHIC, ENC & LHeC Yuhong Zhang February 24, 2010.
Luminosity Considerations for eRHIC
LHC (SSC) Byung Yunn CASA.
Why CeC is needed? High luminosity of US future electron-ion collider(EIC) is critical for success of its physics program 2018 NAS Assessment of U.S.-Based.
Main Design Parameters RHIC Magnets for MEIC Ion Collider Ring
JLEIC Main Parameters with Strong Electron Cooling
MEIC New Baseline: Part 7
MEIC New Baseline: Performance and Accelerator R&D
HE-JLEIC: Do We Have a Baseline?
Crab Crossing Named #1 common technical risk (p. 6 of the report)
Optimization of JLEIC Integrated Luminosity Without On-Energy Cooling*
Presentation transcript:

eRHIC Conceptual Design V.Ptitsyn, J.Beebe-Wang, I.Ben-Zvi, A.Fedotov, W.Fischer, Y.Hao, V.N. Litvinenko, C.Montag, E.Pozdeyev, T.Roser, D.Trbojevic

V.Ptitsyn, Hadron Beam 2008 Workshop eRHIC Scope Polarized light ions ( 3 He) 167 Gev/u Polarized leptons 3-10 Gev ( 20GeV ) Heavy ions (Au) Gev/u Polarized protons Gev (25 GeV) Electron accelerator RHIC e-e- e+e+ p 70% beam polarization goal Exploration of QCD in great details: Different Center-of-Mass Energy -> Different kinematic regions Higher Luminosity -> Precision data Polarized beams -> Spin structure of nucleons (still a puzzle!) Ions up to large A -> Color Glass Condensate (state of extreme gluon densities)

V.Ptitsyn, Hadron Beam 2008 Workshop ERL-based eRHIC Design  10 GeV electron design energy. Possible upgrade to 20 GeV by doubling main linac length.  5 recirculation passes ( 4 of them in the RHIC tunnel)  Multiple electron-hadron interaction points (IPs) and detectors;  Full polarization transparency at all energies for the electron beam;  Ability to take full advantage of transverse cooling of the hadron beams;  Possible options to include polarized positrons: compact storage ring; compton backscattered; undulator-based. Though at lower luminosity. Four recirculation passes PHENIX STAR e-ion detector eRHIC Main ERL (1.9 GeV) Low energy recirculation pass Beam dump Electron source Possible locations for additional e-ion detectors

V.Ptitsyn, Hadron Beam 2008 Workshop Other design options Under consideration also:  ERL-based design for smaller energy. Electron energy up to 2-3 GeV. Acceleration done by a linac placed in the RHIC tunnel. It can serve as first stage for following higher electron energy machine.  High energy (up to GeV) ERL-based design with all accelerating linacs and recirculation passes placed in the RHIC tunnel. Can be elegant and cost saving design solution.  Variation of this design option uses FFAG design of recirculating passses.  Ring-ring design option. Backup design solution which uses electron storage ring. See eRHIC ZDR for more details. The average luminosity is at cm -2 s -1 level limited by beam-beam effects.

V.Ptitsyn, Hadron Beam 2008 Workshop eRHIC Recirculation passes  Separate recirculation loops  Small aperture magnets  Low current, low power consumption  Minimized cost 5 mm 10 GeV (20 GeV) 8.1 GeV (16.1 GeV) 6.2 GeV (12.2 GeV) 4.3 GeV (8.3 GeV) Common vacuum chamber Design development of prototype magnets is underway (V.N.Litvinenko)

ERL-based eRHIC Parameters: e-p mode High energy setupLow energy setup pepe Energy, GeV Number of bunches166 Bunch spacing, ns71 Bunch intensity, Beam current, mA Normalized 95% emittance,  mm.mrad Rms emittance, nm  *, x/y, cm Beam-beam parameters, x/y Rms bunch length, cm201 1 Polarization, % Peak Luminosity, 1.e33 cm -2 s -1 Aver.Luminosity, 1.e33 cm -2 s Luminosity integral /week, pb

V.Ptitsyn, Hadron Beam 2008 Workshop Main R&D Items Electron beam R&D for ERL-based design: –High intensity polarized electron source Development of large cathode guns with existing current densities ~ 50 mA/cm 2 with good cathode lifetime. –Energy recovery technology for high power beams multicavity cryomodule development; high power beam ERL, BNL ERL test facility; loss protection; instabilites. –Development of compact recirculation loop magnets Design, build and test a prototype of a small gap magnet and its vacuum chamber. –Beam-beam effects: e-beam disruption Main R&D items for ion beam: –Beam-beam effects: electron pinch effect; the kink instability … –Polarized 3 He acceleration –166 bunches General EIC R&D item: –Proof of principle of the coherent electron cooling

Luminosity and cooling Pre-cooling of the protons at the injection energy (22 GeV) is required to achieve proton beam-beam limit (  p =0.015) and maximize the luminosity. It can be done by the electron cooling (in ~1h). To reduce the electron current requirements it would be great to have the effective transverse cooling at the storage energy (250 GeV) which can effectively counteract IBS and maintain the emittance well below 6  mm*mrad. Recent revival of the Coherent Electron Cooling idea (V.N.Litvinenko, Ya.S.Derbenev) brings the possibility of the effective longitudinal and transverse cooling for high energy protons. Proof of principle test of CEC has been suggested at RHIC. no cooling

V.Ptitsyn, Hadron Beam 2008 Workshop Interaction Region Design Present IR design features:  No crossing angle at the IP  Detector integrated dipole: dipole field superimposed on detector solenoid.  No parasitic collisions.  Round beam collision geometry with matched sizes of electron and ion beams.  Synchrotron radiation emitted by electrons does not hit surfaces in the detector region.  Blue ion ring and electron ring magnets are warm.  First quadrupoles (electron beam) are at 3m from the IP  Yellow ion ring makes 3m vertical excursion. (Blue) ion ring magnets (Red) electron beam magnets (Yellow) ion ring magnets Detector HERA type half quadrupole used for proton beam focusing e-beam line

V.Ptitsyn, Hadron Beam 2008 Workshop Kink instabiity Proton emittance growth caused by transverse instability. The head of the proton bunch affects the tail through the interactions with the electron beam. Includes synchrotron oscillations. Without tune spread (zero chromaticity) the instability threshold is at 1.6e10 proton per bunch. The tune spread stabilizes the instability. Required chromaticity: >3 units. Nonlinearity character of the beam-beam Interactions also helps. Simulations done by Y.Hao

V.Ptitsyn, Hadron Beam 2008 Workshop Increase of number of bunches Presently RHIC operates with maximum 111 bunches. That should be increased to 166 bunches for eRHIC. Corresponding reduction of the distance between bunches from 106 ns to 71 ns. Issues to be resolved:  Injection system upgrade for shorter kicker rise time.  High intensity problems with larger number of bunches: instabilities, electron cloud, vacuum pressure rise. For instance, the transverse instability at the transition presently limits the beam intensity of ion beams.

V.Ptitsyn, Hadron Beam 2008 Workshop Conclusions The accelerator design work continues on various aspects of the ERL- based design of eRHIC, which presently aims to provide e-p average luminosity at least at cm -2 s -1 level. Major R&D subjects, such as polarized source development, ERL test facility and compact magnet design, are supported by financing. Thus, one can expect advances on those directions in coming 2 years. Effective cooling of high energy protons can reduce requirements on electron beam intensity and simplify the design of the electron accelerator. Modifications of existing RHIC machine include new interaction region(s) and higher number of proton bunches.