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Path integral formulation of light propagation in a static collisionless plasma, and its application to dynamic plasma

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Title
Path integral formulation of light propagation in a static collisionless plasma, and its application to dynamic plasma
Author(s)
JE HOI MUN; CHEONHA JEON; CHANG-MO RYU
Publication Date
2020-03
Journal
OPTICS EXPRESS, v.28, no.5, pp.6417 - 6432
Publisher
OPTICAL SOC AMER
Abstract
© 2020 OSA - The Optical Society. All rights reserved.In many studies on the laser impinging on a plasma surface, an assumption is made that the reflection of a laser pulse propagating to a plasma surface takes place only at the turning point, at which the plasma density exceeds the critical one. A general reflection amplitude of light R from an arbitrary inhomogeneous medium can be obtained by solving a Riccati-type integral equation, which can be solved analytically in low-reflection conditions, i.e., jRj2_1. In this work, we derive an intuitive analytic solution for the reflection amplitude of light R from a plasma surface by integrating all possible reflection paths given by the Fresnel equation. In the low-reflection condition, reflection paths having only one reflection event can be used. By considering the higher-order reflection paths, our analytic expression can describe reflection in the high-reflection condition. We show the results of a one-dimensional particle-in-cell simulation to support our discussions. Since our model derived for static plasmas is well corroborated by the simulation results, it can be a useful tool for analyzing light reflection from dynamically varying plasmas
URI
https://pr.ibs.re.kr/handle/8788114/7165
ISSN
1094-4087
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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