Analytical study of ultra-short pulse reflectometry
Analytical study of ultra-short pulse reflectometry
复制标题
超短脉冲反射测量的分析研究
DOI：
10.1088/0741-3335/43/10/305
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发表时间：
2001
影响因子：
2.2
通讯作者：
Y. Kogi
中科院分区：
文献类型：
--
作者：
L. Bruskin;A. Mase;Akihide Yamamoto;Y. Kogi
这里的超短脉冲（USP）反射计的情况下，随时间变化的二维全波方程的分析处理的结果。我们考虑几种模型的等离子体的几何形状，即线性和非线性板模型，以及一个二维等离子体密度分布与圆柱对称。后一种模型是更现实的1D分层等离子体模型相比，以前采用的所有的分析，最数值，治疗，因为等离子体在融合环形装置，镜面机和等离子体处理室通常可以被认为是轴向对称的规模相关的微波反射。根据解析建模的结果，提出了一种重构剖面的信号记录分析方法。该方法的优点是使用原始信号记录，而不是不良的本地化频率模式，这使得它的强大的轮廓测量使用USP反射计。
The results of an analytical treatment of the time-dependent 2D full-wave equation are presented here for the case of ultra-short pulse (USP) reflectometry. We consider several models of the plasma geometry, namely linear and nonlinear slab models, as well as a 2D plasma density profile with cylindrical symmetry. The latter model is more realistic when compared to the 1D stratified plasma models previously employed in all the analytical, and most numerical, treatments, since the plasma in fusion toroidal devices, mirror machines and plasma processing chambers can often be considered axially symmetric on the scale relevant to microwave reflectometry. Based on the results of analytical modelling, a signal record analysis method of profile reconstruction is proposed. The method has the advantage of using raw signal records instead of poorly localized frequency modes, which makes it robust for the profile measurements using USP reflectometry.