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Electron Acceleration in Cavitated Channels Formed by a Petawatt Laser in Low-Density Plasma
S.P.D Mangles
1
B. R. Walton
1
M. Tzoufras
2
Z. Najmudin
1
R.J. Clarke
3
A.E. Dangor
1
R. G. Evans
1, 4
Sven Fritzler
5
A. Gopal
1
C. Hernandez-Gomez
3
W.B. Mori
2
W. Rozmus
1
M. Tatarakis
1
A. G. R. Thomas
1
F. S. Tsung
2
M. S. Wei
1
K. Krushelnick
1
K. Krushelnick 1
Author
1
Blackett Laboratory (Prince Consort Road, South Kensington, London SW7 2AZ - United Kingdom)
- Imperial College London (South Kensington Campus, London SW7 2AZ - United Kingdom)
2
Department of Physics and Astronomy [UCLA, Los Angeles] (Los Angeles, CA 90095-1547 - United States)
- UCLA - University of California [Los Angeles] ( Los Angeles, Californie 90095 - United States)
- University of California (United States)
3
CLF - Central Laser Facility (Chilton, Didcot, Oxon OX11 0QX - United Kingdom)
- RAL - STFC Rutherford Appleton Laboratory (Harwell Campus, Didcot OX11 0FA - United Kingdom)
- STFC - Science and Technology Facilities Council (Polaris House, North Star Avenue, Swindon SN2 1SZ - United Kingdom)
5
LOA - Laboratoire d'optique appliquée (828, boulevard des Maréchaux 91762 Palaiseau Cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7639 (France)
- X - École polytechnique (École polytechnique, 91128 Palaiseau Cedex - France)
- ENSTA Paris - École Nationale Supérieure de Techniques Avancées (828, boulevard des Maréchaux 91762 Palaiseau Cedex - France)
Abstract : The spectra of energetic electrons produced by a laser interaction with underdense plasma have been measured at intensities >3×10^20 W cm^-2. 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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https://hal-polytechnique.archives-ouvertes.fr/hal-00508042
Contributor : Thuy Le <>
Submitted on : Monday, August 2, 2010 - 2:52:02 PM
Last modification on : Monday, September 21, 2020 - 11:34:08 AM
Contributor : Thuy Le <>
Submitted on : Monday, August 2, 2010 - 2:52:02 PM
Last modification on : Monday, September 21, 2020 - 11:34:08 AM
Identifiers
- HAL Id : hal-00508042, version 1
- DOI : 10.1103/PhysRevLett.94.245001
Citation
S.P.D Mangles, B. R. Walton, M. Tzoufras, Z. Najmudin, R.J. Clarke, et al.. Electron Acceleration in Cavitated Channels Formed by a Petawatt Laser in Low-Density Plasma. Physical Review Letters, American Physical Society, 2005, 94 (24), pp.245001. ⟨10.1103/PhysRevLett.94.245001⟩. ⟨hal-00508042⟩
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