Development of multi-channel and multi-wavelength detection for observing 2D turbulence dynamics

基于对等离子体湍流和输运的深入认识，基于波动和结构之间的多尺度非线性耦合，开发了用于层析成像系统的超多通道多波长探测技术。一个132英寸的原型系统被构建在一个线性圆柱形装置中，称为PANTA，能够探测到整个等离子体横截面以四个方位角45度分开的可见光。整个等离子体区域已经能够被成功地测量，包括它的动力学，用可见光。对等离子体光发射的二维图像进行重构，检测出具有足够信噪比的波动分量。对于x射线和紫外光，利用闪烁体和荧光玻璃的方法已经初步发展成功。本文对层析成像算法进行了探索，并证明了所提出方法的主要原理。

Aiming at advanced understanding of plasma turbulence and transport, based on multi-scale nonlinear couplings between fluctuations and structures, super multi-channel and multi-wavelength detection has been developed for tomographic system. A 132 ch. prototype system is constructed in a linear cylindrical device, termed PANTA, to be able to detect visible lights with covering the whole plasma cross-section in four azimuthal angles separated by 45 degree apart. The whole region of plasma has been able to be successfully measured, including its dynamics, with visible lights. Two-dimensional image of plasma light emission was reconstructed, and the fluctuation component was detected with sufficient signal-to-noise ratio. As for X-ray and ultra-violet light, the initial development of the methods using scintillator and flourescence glass has been successfully accomplished. Tomography algorithms have been explored and the major principle of the proposed method have been proved.