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

Journal Article · Thu Dec 15 04:00:00 EST 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3663843· OSTI ID:22047138

Seto, Keita; Nagatomo, Hideo; Mima, Kunioki ^[1]; Koga, James ^[2]

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

The intensity of the ultra-short pulse lasers has reached 10{sup 22} W/cm{sup 2} 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.

• OSTI ID: 22047138
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 18; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BREMSSTRAHLUNG
DAMPING
DIRAC EQUATION
ELECTRONS
ENERGY LOSSES
EQUATIONS OF MOTION
LASER RADIATION
LASERS
LIGHT TRANSMISSION
PULSES
RELATIVISTIC PLASMA
RELATIVISTIC RANGE