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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 >Interferometric studies of laser-created plasmas using compact soft x-ray lasers
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Interferometric studies of laser-created plasmas using compact soft x-ray lasers

机译：使用紧凑型软X射线激光器对激光产生的等离子体进行干涉测量研究

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摘要

We summarize results of several successful dense plasma diagnostics experiments realized by combining two different kinds of table-top soft x-ray lasers with an amplitude division interferometer based on diffraction grating beam splitters. In the first set of experiments this robust high throughput diffraction grating interferometer (DGI) was used with a 46.9 nm portable capillary discharge laser to study the dynamics of line focus and point focus laser-created plasmas. The measured electron density profiles, which differ significantly from those expected from a classical expansion, unveil important two-dimensional effects of the dynamics of these plasmas. A second DGI customized to operate in combination with a 14.7 nm Ni-like Pd transient gain laser was used to perform interferometry of line focus laser-created plasmas with picosecond time resolution. These measurements provide valuable new benchmarks for complex hydrodynamic codes and help bring new understanding of the dynamics of dense plasmas. The instrumentation and methodology we describe is scalable to significantly shorter wavelengths, and constitutes a promising scheme for extending interferometry to the study of very dense plasmas such as those investigated for inertial confinement fusion.
机译：我们总结了几种成功的密集等离子体诊断实验的结果，这些实验是通过将两种不同类型的台式软X射线激光器与基于衍射光栅分束器的振幅分割干涉仪相结合而实现的。在第一组实验中，此坚固的高通量衍射光栅干涉仪（DGI）与46.9 nm便携式毛细管放电激光器一起使用，研究了线聚焦和点聚焦激光产生的等离子体的动力学。测得的电子密度分布与经典扩展所预期的显着不同，揭示了这些等离子体动力学的重要二维效应。定制的第二个DGI与14.7 nm的类似Ni的Pd瞬态增益激光器结合使用，用于对具有皮秒时间分辨率的线聚焦激光器产生的等离子体进行干涉测量。这些测量为复杂的流体力学代码提供了有价值的新基准，有助于使人们对稠密等离子体的动力学有了新的认识。我们描述的仪器和方法可扩展到明显更短的波长，并且构成了将干涉测量法扩展到研究非常稠密的等离子体（例如为惯性约束聚变研究的等离子体）的有前途的方案。

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