Theoretical Study of Ultra-Relativistic Laser Electron Interaction with Radiation Reaction by Quantum Description
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概要
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In the near future, the intensity of the ultra-short pulse laser will reach to 1022 W/cm2. When an electron is irradiated by this laser, the electron's behavior is relativistic with significant bremsstrahlung. This radiation from the electron is regarded as the energy loss of electron. Therefore, the electron's motion changes because of the kinetic energy changing. This radiation effect on the charged particle is the self-interaction, called the “radiation reaction” or the “radiation damping”. For this reason, the radiation reaction appears in laser electron interactions with an ultra-short pulse laser whose intensity becomes larger than 1022 W/cm2. In the classical theory, it is described by the Lorentz-Abraham-Dirac (LAD) equation. But, this equation has a mathematical difficulty, which we call the “run-away”. Therefore, there are many methods for avoiding this problem. However, Dirac's viewpoint is brilliant, based on the idea of quantum electrodynamics. We propose a new equation of motion in the quantum theory with radiation reaction in this paper.
著者
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Mima Kunioki
Institue Of Laser Engineering Osaka University
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Nagatomo Hideo
Institute Of Laser Engineering Osaka University
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KOGA James
Advanced Beam Technology Division, Japan Atomic Energy Agency, Kyoto 619-0215, Japan
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SETO Keita
Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
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SETO Keita
Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita 565-0871, Japan
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