Plasma Confinement Study related to Distortion of Velocity Distribution using Broadband N//-scanning ECE measurements

(1)扩展N//工作区方形波纹波导天线系统的研制制备了扩展N//工作区方形波纹波导天线的激励/耦合、传播和辐射集成代码。此外，还提出了一种新的方法，从测量的振幅和相位曲线来分析模式的激发/传播。采用集成代码和开发方法对方形波纹波导天线的性能进行了分析，验证了其在斜向ECE测量中的可行性。(2)在TRIAM-1M托卡马克上的ECH/ECCD实验和ECE测量，为了评估在托卡马克上的ECH/ECCD实验中沉积的功率，使用了TASK/WR代码，包括在高能量电子的速度分布中的畸变效应。电流驱动效率由功率和驱动电流计算得到，方波波导天线的驱动效率与传统天线系统的驱动效率具有较好的可比性。在托卡马克上测量了高频宽带ECE。在测量中，成功地使用了超出布拉格极限的方形波纹波导天线系统。(3)宽带DSB辐射计的研制DSB辐射计是一种用于宽带ECE测量的新型辐射计。低频本振（LO）部分采用10μs快速频率开关合成器和微波倍频器。三种谐波辐射计均采用低频本振部分。较低的频率根据谐波数乘以毫米乘法器。(4) LHDA的基本常模ECE在LHD的ECH实验中进行了测量。用研制的DSB辐射计测量了电子温度分布的时间演变，观察到内部输运势垒的崩溃。所研制的辐射计是研究等离子体约束和热输运的有效手段。少

(1) Development of Square Corrugated Waveguide Antenna System with Extended N// Operation RegionAn integration code to teat an excitation/coupling, propagation and radiation at a square corrugated waveguide antenna with extended N// operation region was prepared. A new method was additionally developed to analyze the mode excitation/propagation from measured amplitude and phase profiles. The performance of the square corrugated waveguide antenna was analyzed using the integration code and developed method, and its availability for oblique ECE measurements was confirmed.(2) ECH/ECCD experiments and ECE measurements on the TRIAM-1M tokamakIn order to evaluate deposited power in ECH/ECCD experiments on the tokamak, the TASK/WR code was used, including the distortion effect in a velocity distribution on high energetic electrons. The current drive efficiency was derived from the evaluated power and the driven current The estimated efficiency at the square corrugated waveguide antenna was co … More mparable to that at the traditional antenna system.The high frequency and broadband ECE was measured at the tokamak. In the measurements, the square corrugated waveguide antenna system was successfully used beyond Bragg limit.(3) Development of Broadband DSB radiometerA DSB radiometer was newly developed for broadband ECE measurements. The fast frequency-switching (10μs) synthesizer and microwave frequency-multipliers were used in the lower-frequency local oscillator(LO)part. The lower-frequency LO part was used for 3 harmonic radiometers in common. The lower frequencies were multiplied by the millimeter multiplier in accordance with harmonic numbers.(4) ECE measurements and Transport Study on the LHDA fundamental ordinary-mode ECE was measured in the ECH experiments at the LHD. The crash of an internal transport barrier was observed in the time evolution of the electron temperature profile, which are measured by the developed DSB radiometer. The developed radiometer has been effective to study the plasma confinement and the heat transport. Less