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“Putting Beam Physics at the Forefront of Science”

Beam-Driven Plasma Based Advanced Acceleration Concepts C.Joshi UCLA. “Putting Beam Physics at the Forefront of Science”. Work supported by DOE. IN HONOR OF Professor Ron Davidson’s Leadership Role in HEDS What are the compelling questions? Frontiers in High Energy Density Physics-

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“Putting Beam Physics at the Forefront of Science”

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  1. Beam-Driven Plasma Based Advanced Acceleration Concepts C.Joshi UCLA “Putting Beam Physics at the Forefront of Science” Work supported by DOE

  2. IN HONOR OF Professor Ron Davidson’s Leadership Role in HEDS What are the compelling questions? Frontiers in High Energy Density Physics- The X-Games of Contemporary Science (NRC Press 2003) Frontiers for Discovery in High Energy Density Physics Prepared for OSTP by National Task Force on High Energy Density Physics.

  3. TASK FORCE WORKING GROUPS Chair:Davidson,Co-Chair:Katsouleas HEDP Task Force A - HEDP in Astrophysical Systems Rosner (Chair), Arons, Baring, Lamb, Stone B - Beam-Induced HEDP (RHIC, heavy ion fusion, high-intensity accelerators, etc.) Joshi (Chair), Jacak, Logan, Mellisinos, Zajc S - HEDP in Stockpile Stewardship Facilities (Omega, Z, National Ignition Facility, etc.) Remington (Chair), Deeney, Hammer, Lee, Meyerhofer, Schneider, Silvera, Wilde U - Ultrafast, Ultraintense Laser Science Ditmire (Chair), DiMauro, Falcone, Hill, Mori, Murnane

  4. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + + + - - - - - - - - - drive beam + - - + + + + + - + + + + + - + + + + + + + - - - - + + + + + + + + + + + + + + + - - - - - - - - - - - - - - - - - - - - - - - + + + + + + + + + + + + + + + - - - - - - + + + + + + + + + + + + - - - - - - - + + + + + + + + + + + + + + + - - - - - - - - - - - - - - - - - - + + + + + + + + - - - - - - - - - Ez Plasma Wakefield Accelerators (Blowout Regime) Rosenzweig et. 1990 Pukhov and Meyer-te-vehn 2002 (Bubble) • Space charge/ponderomotive force of thee beam/laser pulse displaces plasma electrons • Plasma ion channel exerts restoring force => space charge oscillations • Linear focusing force on beams (F/r=2pne2/m) • Accelerating Field 100 GeV/m , Focusing Gradients MT/m UCLA,USC,SLAC,ANL,FNAL,KEK,BNL

  5. Plasma Accelerator Progress “Accelerator Moore’s Law” ILC Working Machines Doing physics Max.Energy in Laser Experiments UCLA

  6. High Energy Density Science with Ultra-relativistic Electron Beams: Compelling Question Can the ultra high electric fields in a beam-driven plasma wakefield be harnessed and sufficiently controlled to accelerate and focus high-quality, high-energy beams in compact devices?

  7. Beam-Driven PWFA@ SLAC Located in the FFTB 25 m FFTB

  8. BREAKING THE 1 GeV BARRIER With 15 micron long bunches ne≈3.51017 cm-3L≈10 cm, N≈ 1.81010 Charge Fraction at E>0: 8% of total charge!

  9. U C L A ENERGY GAIN SCALING with PLASMA LENGTH 14GeV Energy Gain in less than 30cm !

  10. E-167: Energy Doubling with aPlasma Wakefield Accelerator in the FFTB U C L A Some electrons double their energy in 84cm! Linac running all out to deliver compressed 42GeV Electron Bunches to the plasma Record Energy Gain Highest Energy Electrons Ever Produced @ SLAC Significant Advance in Demonstrating Potential of Plasma Accelerators Nature vol 445,p741 (2007)

  11. Plasma Accelerator Progress “Accelerator Moore’s Law” ILC Working Machines Doing physics E167 E164X LBNL RAL LBL Osaka Max.Energy in Plasma Experiments UCLA

  12. Goals and Relevance To address critical issues for realizing a plasma-based accelerator at the energy frontier in the next decade. New Compelling Question Plasma Afterburner for a conventional linear collider?

  13. Plasma Afterburner for Linear Collider Drive Beams Excite Ultrahigh-Gradient Accelerating Structures in Plasmas Trailing Beams Extract Energy From These Structures C.Joshi and T.Katsouleas Physics Today June 2003 p47

  14. Conclusion: Marx :HEPAP subpanel “The challenge is to undertake and sustain the difficult and complex R&D needed to enable a feasible,cost and energy effective technology on the several decade horizon.Achieving these goals will require creativity and the development and maturation of new accelerator approaches and technologies.” C.J. & T.K. thank their colleagues on experiments E164X and E167

  15. Thanks Ron!!! Keep asking us What are the compelling Questions? With very best wishes from Plasma-Accelerators Community

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