Electron Acceleration in Cavitated Channels Formed by a Petawatt Laser in Low-Density Plasma

S. P. D. Mangles, B. R. Walton, M. Tzoufras, Z. Najmudin, R. J. Clarke, A. E. Dangor, R. G. Evans, S. Fritzler, A. Gopal, C. Hernandez-Gomez, W. B. Mori, W. Rozmus, M. Tatarakis, A. G. R. Thomas, F. S. Tsung, M. S. Wei, and K. Krushelnick
Phys. Rev. Lett. 94, 245001 – Published 21 June 2005

Abstract

The spectra of energetic electrons produced by a laser interaction with underdense plasma have been measured at intensities >3×1020Wcm2. Electron energies in excess of 300 MeV have been observed. Measurements of the transmitted laser spectrum indicate that there is no correlation between the acceleration of electrons and plasma wave production. Particle-in-cell simulations show that the laser ponderomotive force produces an ion channel. The interaction of the laser field with the nonlinear focusing force of the channel leads to electron acceleration. The majority of the electrons never reach the betatron resonance but those which gain the highest energies do so. The acceleration process exhibits a strong sensitivity to initial conditions with particles that start within a fraction of a laser wavelength following completely different trajectories and gaining markedly different energies.

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  • Received 12 April 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.245001

©2005 American Physical Society

Authors & Affiliations

S. P. D. Mangles1, B. R. Walton1, M. Tzoufras4, Z. Najmudin1, R. J. Clarke3, A. E. Dangor1, R. G. Evans1,5, S. Fritzler2, A. Gopal1, C. Hernandez-Gomez3, W. B. Mori4, W. Rozmus1,*, M. Tatarakis1, A. G. R. Thomas1, F. S. Tsung4, M. S. Wei1, and K. Krushelnick1

  • 1Blackett Laboratory, Imperial College London, SW7 2BZ, United Kingdom
  • 2Laboratoire d’Optique Appliquée, École Nationale Supérieure des Techniques Avancées, École Polytechnique, CNRS, UMR 7639, 91761 Palaiseau, France
  • 3Central Laser Facility, Rutherford Appleton Laboratory, Oxon, OX11 0QX, United Kingdom
  • 4Department of Physics and Astronomy, UCLA, Los Angeles, California 90095, USA
  • 5AWE plc, Aldermaston, Reading RG7 4PR, United Kingdom

  • *Permanent address: Department of Physics, University of Alberta, Edmonton, Canada

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Vol. 94, Iss. 24 — 24 June 2005

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Heating up of Superconductors
January 27, 2017

This collection marks the 30th anniversary of the discovery of high-temperature superconductors. The papers selected highlight some of the advances that have been made to date, both in understanding why these compounds behave in the way they do, and in utilizing them in applications. The papers included in the collection have been made free to read.

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