强激光与高Z靶的相互作用——激光与等离子体相互作用的理论模拟(Ⅱ)

计算物理 ›› 1990, Vol. 7 ›› Issue (1): 91-100.

强激光与高Z靶的相互作用——激光与等离子体相互作用的理论模拟(Ⅱ)

彭惠民, 张国平, 盛家田

北京应用物理与计算数学研究所 100088

收稿日期:1989-03-01 出版日期:1990-03-25 发布日期:1990-03-25

THE INTERACTIONS OF LASER BEAM WITH HIGH Z SOLID TARGET——COMPUTATIONAL SIMULATION OF THE INTERACTIONSFOR LASER WITH PLASMA(Ⅱ)

Peng Huimin, Zhang Guoping, Sheng Jiatian

Institute of Applied Physics and Computational Mathematics, Beijing

Received:1989-03-01 Online:1990-03-25 Published:1990-03-25

摘要/Abstract

摘要： 本文用一维非平衡辐射流体力学激光打靶程序JB-19模拟了强激光与高Z的金靶相互作用形成的等离子体状态。考虑的物理过程有:韧致效应,光电离和辐射俘获,电子碰撞电离和三体复合,电子碰撞激发和退激发,线辐射和线吸收以及康普顿散射过程等。用波长1.06μm、脉宽600ps和峰值功率密度3×10¹⁴W/cm²的高斯型脉冲辐照厚约20μm的金圆盘靶,计算出的金靶对入射激光的吸收效率和激光-X光转换效率与国外实验结果基本一致。

关键词: 激光等离子体相互作用, 逆韧致吸收, 激光的吸收效率, 激光-X光转换效率

Abstract: The 1-D non-LTE radiative hydrodynamic laser irradiated code JB-19 is used to calculate the laser-produced plasma conditions of high z gold disk. Following physical processes are considered:bremsstrahlung effect, radiative ionization and recombination, collisional ionization by electrons and three-boby recombination, collisional excitation and de-excitation by electrons, radiative line emission and absorption and Compton scattering. A gaussian laser pulse with wavelength 1. 06μm, FWHM 600ps and peak intensity 3×10¹⁴W/cm² is used to irradiate thickness 20μm gold disk. The computational results for laser-produced plasma conditions and the absorption efficiency and laser-x-rays conversion efficiency for gold disk are shown.

Key words: laser-plasma interaction, inverse-bremsstrahlung absorption, absorption efficiency, laser-x-ray conversion efficiency

彭惠民, 张国平, 盛家田. 强激光与高Z靶的相互作用——激光与等离子体相互作用的理论模拟(Ⅱ)[J]. 计算物理, 1990, 7(1): 91-100.

Peng Huimin, Zhang Guoping, Sheng Jiatian. THE INTERACTIONS OF LASER BEAM WITH HIGH Z SOLID TARGET——COMPUTATIONAL SIMULATION OF THE INTERACTIONSFOR LASER WITH PLASMA(Ⅱ)[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 1990, 7(1): 91-100.

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