Author: Fonseca, R.A.
Paper Title Page
TUOBN1 Laser Wakefield Acceleration Beyond 1 GeV using Ionization Induced Injection 707
 
  • K.A. Marsh, C.E. Clayton, C. Joshi, N. Lemos, W. Lu, W.B. Mori, A.E. Pak
    UCLA, Los Angeles, California, USA
  • F. Albert, T. Doeppner, C. Filip, D.H. Froula, S.H. Glenzer, B.B. Pollock, D. Price, J.E. Ralph
    LLNL, Livermore, California, USA
  • R.A. Fonseca, S.F. Martins
    Instituto Superior Tecnico, Lisbon, Portugal
  • L.O. Silva
    IPFN, Lisbon, Portugal
 
  Funding: Supported by DOE Grants No. DE-AC52-07NA27344, DE-FG03-92ER40727, DE-FG02-92ER40727, DE-FC02-07ER41500, DE-FG52-09NA29552, NSF Grants No. PHY-0936266, PHY-0904039 and FCT, Por., No. SFRH/BD/35749/2007
A series of laser wakefield accelerator experiments leading to electron energy exceeding 1 GeV are described. Theoretical concepts and experimental methods developed while conducting experiments using the 10 TW Ti:Sapphire laser at UCLA were implemented and transferred successfully to the 100 TW Calisto Laser System at the Jupiter Laser Facility at LLNL. To reach electron energies greater than 1 GeV with current laser systems, it is necessary to inject and trap electrons into the wake and to guide the laser for more than 1 cm of plasma. Using the 10 TW laser, the physics of self-guiding and the limitations in regards to pump depletion over cm-scale plasmas were demonstrated. Furthermore, a novel injection mechanism was explored which allows injection by ionization at conditions necessary for generating electron energies greater than a GeV. The 10 TW results were followed by self-guiding at the 100 TW scale over cm plasma lengths. The energy of the self-injected electrons, at 3x1018 cm-3 plasma density, was limited by dephasing to 720 MeV. Implementation of ionization injection allowed extending the acceleration well beyond a centimeter and 1.4 GeV electrons were measured.
 
slides icon Slides TUOBN1 [2.488 MB]  
 
TUOBN5 A Proposed Experimental Test of Proton-Driven Plasma Wakefield Acceleration Based on CERN SPS 718
 
  • G.X. Xia, A. Caldwell
    MPI-P, München, Germany
  • W. An, C. Joshi, W. Lu, W.B. Mori
    UCLA, Los Angeles, California, USA
  • R.W. Assmann, F. Zimmermann
    CERN, Geneva, Switzerland
  • R.A. Fonseca, N.C. Lopes, J. Vieira
    Instituto Superior Tecnico, Lisbon, Portugal
  • C. Huang
    LANL, Los Alamos, New Mexico, USA
  • K.V. Lotov
    BINP SB RAS, Novosibirsk, Russia
  • P. Muggli
    USC, Los Angeles, California, USA
  • A.M. Pukhov
    HHUD, Dusseldorf, Germany
  • L.O. Silva
    IPFN, Lisbon, Portugal
 
  Proton-driven plasma wakefield acceleration (PDPWA) has been proposed as an approach to accelerate electron beam to TeV energy regime in a single passage of plasma channel. An experimental test is recently proposed to demonstrate the capability of PDPWA by using proton beams from the CERN SPS. The preparation of experiment is introduced. The particle-in-cell simulation results based on realistic beam parameters are presented.  
slides icon Slides TUOBN5 [2.208 MB]