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

为了深入理解等离子体的湍流和输运，基于涨落与结构的多尺度非线性耦合，发展了多通道、多波长的超分辨层析成像系统。一个132 ch.原型系统被构造在一个线性圆柱形的设备，称为PANTA，能够检测可见光与覆盖整个等离子体横截面的四个方位角分开45度。等离子体的整个区域已经能够用可见光成功地测量，包括其动力学。重建了等离子体光发射的二维图像，并以足够的信噪比检测了等离子体光发射的起伏分量。对于X射线和紫外光，已经成功地完成了使用闪烁体和荧光玻璃的方法的初步开发。对层析成像算法进行了探讨，并对所提出方法的主要原理进行了论证。

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.