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Hooker, S. M.

Paper Title Page
WEYKI02 Experimental Demonstration of 1 GeV Energy Gain in a Laser Wakefield Accelerator 1911
  • A. J. Gonsalves, S. M. Hooker
    OXFORDphysics, Oxford, Oxon
  • D. L. Bruhwiler, J. R. Cary
    Tech-X, Boulder, Colorado
  • E. Cormier-Michel
    University of Nevada, Reno, Reno, Nevada
  • E. Esarey, C. G.R. Geddes, W. Leemans, K. Nakamura, C. B. Schroeder, C. Toth
    LBNL, Berkeley, California
  GeV-class electron accelerators have a broad range of uses, including synchrotron facilities, free electron lasers, and high-energy particle physics. The accelerating gradient achievable with conventional radio frequency (RF) accelerators is limited by electrical breakdown within the accelerating cavity to a few tens of MeV, so the production of energetic beams requires large, expensive accelerators. One promising technology to reduce the cost and size of these accelerators (and to push the energy frontier for high-energy physics) is the laser-wakefield accelerator (LWFA), since these devices can sustain electric fields of hundreds of GV/m. In this talk, results will be presented on the first demonstration of GeV-class beams using an intense laser beam. Laser pulses with peak power ranging from 10-40TW were guided in a 3.3 cm long gas-filled capillary discharge waveguide, allowing the production of high-quality electron beams with energy up to 1 GeV. The electron beam characteristics and laser guiding, and their dependence on laser and plasma parameters will be discussed and compared to simulations.  
slides icon Slides  
THPMN113 Performance of Capillary Discharge Guided Laser Plasma Wakefield Accelerator 2978
  • K. Nakamura, E. Esarey, C. G.R. Geddes, A. J. Gonsalves, W. Leemans, D. Panasenko, C. B. Schroeder, C. Toth
    LBNL, Berkeley, California
  • S. M. Hooker
    OXFORDphysics, Oxford, Oxon
  Funding: This work is supported by US DoE office of High Energy Physics under contract DE-AC02-05CH11231 and DARPA.

A GeV-class laser-driven plasma-based wakefield accelerator has been realized at the Lawrence Berkeley National Laboratory (LBNL). The device consists of a 100 TW-class high repetition rate Ti:sapphire LOASIS laser system of LBNL and a gas-filled capillary discharge waveguide developed at Oxford University. Results will be presented on the generation of GeV-class electron beams with a 3.3 cm long preformed plasma channel. The use of a discharge-based waveguide permitted operation at an order of magnitude lower density and 15 times longer distance than in previous experiments that relied on laser-preformed plasma channels. Laser pulses with peak power ranging from 10-50 TW were guided over more than 20 Rayleigh ranges and high-quality electron beams with energy up to 1 GeV were obtained. The dependence of the electron beam characteristics on plasma channel properties and laser parameters are discussed.