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Physics of Plasmas / Volume 18 / Issue 12 / ARTICLES / Lasers, Particle Beams, Accelerators, Radiation Generation

Phys. Plasmas 18, 123101 (2011); http://dx.doi.org/10.1063/1.3663843 (8 pages)

Equation of motion with radiation reaction in ultrarelativistic laser-electron interactions

Keita Seto1, Hideo Nagatomo1, James Koga2, and Kunioki Mima1

1Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
2Advance Photon Research Center, Kansai Research Establishment, Japan Atomic Energy Research Institute, Kyoto 619-0215, Japan

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(Received 6 September 2011; accepted 21 October 2011; published online 2 December 2011)

The intensity of the ultra-short pulse lasers has reached 1022 W/cm2 owing to the advancements of laser technology. When the motion of an electron becomes relativistic, bremsstrahlung accompanies it. The energy from this bremsstrahlung corresponds to the energy loss of the electron; therefore, the motion of the electron deviates from the case without radiation. The radiation behaves something like resistance. This effect called “radiation reaction” or “radiation damping” and the force converted from the radiation is named the “radiation reaction force” or the “damping force”. The equation of motion with the reaction force is known as the Lorentz-Abraham-Dirac (LAD) equation, but the solution of this equation is not physical due to the fact that it has a “run-away” solution. As one solution of this problem, we have derived a new equation which takes the place of the Lorentz-Abraham-Dirac equation. We will show the validity of this equation with a simple theoretical analysis.

© 2011 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. NEW DESCRIPTION OF RADIATION REACTION
  3. AVOIDANCE OF RUN-AWAY
  4. ULTRARELATIVISTIC LIMIT AND NONRELATIVISTIC LIMIT
  5. CONCLUSION

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KEYWORDS and PACS

Keywords

bremsstrahlung, damping, plasma light propagation, relativistic plasmas

PACS

  • 52.27.Ny

    Relativistic plasmas

  • 52.40.Db

    Electromagnetic (nonlaser) radiation interactions with plasma

  • 52.25.Os

    Emission, absorption, and scattering of electromagnetic radiation

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3663843

PUBLICATION DATA

ISSN

1070-664X (print)  
1089-7674 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    G. A. Mourou, C. P. J. Barry, and M. D. Perry, Phys. Today 51, 22 (1998)PHTOAD000051000007000022000001.

    J. Koga, T. Z. Esirkepov, and S. V. Bulanov, Phys. Plasma 12, 093106 (2005)PHPAEN000012000009093106000001.


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