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首页> 外文期刊>Applied optics >Radiation from asymmetric laser-induced plasmas collected by a lens or optical fiber
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Radiation from asymmetric laser-induced plasmas collected by a lens or optical fiber

机译：由透镜或光纤收集的不对称激光诱导等离子体的辐射

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摘要

A method of calculating radiation spectra of an asymmetric (ellipsoidal) laser-induced plasma plume is developed for two cases, when the radiation is collected by a lens and by an optical fiber. The lens receives the radiation coming from the entire plasma plume, while the view sight of an optical fiber is restricted to an acceptance cone so that only the radiation coming with an incident angle smaller than the cone angle is collected. The method incorporates the solution of the radiative transfer equation along the line of sight. An optimal number of lines is found to achieve the numerical convergence with a relative error < 1%. Several practical simulations are carried out that include different placements and orientations of the lens and optic fiber. The effect of a motion of the center of the mass of the plasma plume on the radiation spectra is also investigated. (c) 2008 Optical Society of America.
机译：当通过透镜和通过光纤收集辐射时，针对两种情况发展了一种计算不对称（椭圆形）激光诱导的等离子体羽的辐射光谱的方法。透镜接收来自整个等离子羽流的辐射，而光纤的视线仅限于接收锥，因此仅收集入射角小于锥角的辐射。该方法结合了沿视线的辐射传递方程的解。找到最佳的行数可以实现数值收敛，且相对误差<1％。进行了一些实际的仿真，包括透镜和光纤的不同放置和方向。还研究了等离子体羽流质心的运动对辐射光谱的影响。 （c）2008年美国眼镜学会。

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