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首页> 外文会议>Conference on Soft X-Ray Lasers and Applications V; Aug 6-7, 2003; San Diego, California, USA >Innershell femtosecond X-ray lasers pumped by Larmor radiation and characteristics of Larmor radiation
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Innershell femtosecond X-ray lasers pumped by Larmor radiation and characteristics of Larmor radiation

机译：拉莫尔辐射泵浦的内壳飞秒X射线激光器和拉莫尔辐射的特性

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摘要

High-repetition-rate, femtosecond x-ray lasers would be useful for dynamical study of ultra-fast phenomena in nature. One of routes to get fs x-ray lasers is to use inner-shell processes in atomic and ionic systems. In this paper, the two inner-shell schemes recently proposed will be reviewed and compared in detail. One of important issues using inner-shell schemes is fast and intense x-ray pumping source. One of good candidate sources for that purpose is Larmor radiation produced by electrons under an intense fs laser field. The relativistic, nonlinear Thomson scattering by an electron of an intense laser field is investigated in computer simulation. Under a laser field with a pulse duration of 20 fs Full Width Half Maximum and an intensity of 10~(20) W/cm~2, the motion of an electron is highly relativistic and generates an ultra-short radiation of 2 attoseconds with photon energies of 100 to 600 eV. An interesting modulated structure of the spectrum is observed and analyzed. A radiation produced by the zigzag motion of an electron under a linearly polarized laser has better characteristics than by a helical motion under a circularly polarized laser pulse in terms of an angular divergence and an energy spectrum.
机译：飞秒高重复率的X射线激光将用于自然界中超快现象的动力学研究。获得fs X射线激光器的方法之一是在原子和离子系统中使用内壳工艺。在本文中，将对最近提出的两种内壳方案进行审查和详细比较。使用内壳方案的重要问题之一是快速而强烈的X射线泵浦源。用于此目的的良好候选源之一是在强fs激光场下电子产生的拉莫尔辐射。在计算机仿真中研究了强激光场电子对相对论的非线性汤姆森散射。在脉冲持续时间为20 fs全宽半峰且强度为10〜（20）W / cm〜2的激光场下，电子的运动是高度相对论的，并在光子的作用下产生2阿秒的超短辐射能量为100至600 eV。观察并分析了一个有趣的频谱调制结构。就角散度和能谱而言，由电子在线性偏振激光下的锯齿形运动产生的辐射具有比在圆偏振激光脉冲下的螺旋形运动更好的特性。

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