论文标题
用于高能密度的密度波动测量的成像折光仪
An Imaging Refractometer for Density Fluctuation Measurements in High Energy Density Plasmas
论文作者
论文摘要
我们报告了最近开发的激光销售诊断，该诊断允许在一个轴上直接测量射线偏移角，同时在另一个轴上保留成像功能。这使我们能够测量激光束的角度偏转光谱，该激光束通过湍流的高能密度等离子体传递。该频谱包含有关等离子体内密度波动的信息，这些信息将探测激光偏转在一定角度范围内。 ％描述了该诊断的原理，以及我们的具体实验实现。我们使用射线追踪创建合成诊断，以将这种新诊断与标准阴影图和Schlieren成像方法进行比较，这证明了这种新诊断对标准技术的灵敏度的增强。我们介绍了血浆中反向休克背后的湍流的实验数据，并证明该技术可以测量0.06至34 MRAD之间的角度偏转，对应于500多个动态范围。
We report on a recently developed laser-probing diagnostic which allows direct measurements of ray-deflection angles in one axis, whilst retaining imaging capabilities in the other axis. This allows us to measure the spectrum of angular deflections from a laser beam which passes though a turbulent high-energy-density plasma. This spectrum contains information about the density fluctuations within the plasma, which deflect the probing laser over a range of angles. %The principle of this diagnostic is described, along with our specific experimental realisation. We create synthetic diagnostics using ray-tracing to compare this new diagnostic with standard shadowgraphy and schlieren imaging approaches, which demonstrates the enhanced sensitivity of this new diagnostic over standard techniques. We present experimental data from turbulence behind a reverse shock in a plasma and demonstrate that this technique can measure angular deflections between 0.06 and 34 mrad, corresponding to a dynamic range of over 500.
