Two-Dimensional Studies of Electron Bernstein Wave Emission in MAST
Two-Dimensional Studies of Electron Bernstein Wave Emission in MAST
复制标题
MAST 中电子伯恩斯坦波发射的二维研究
DOI：
10.13182/fst10-137
复制
发表时间：
2011
影响因子：
0.9
通讯作者：
R. Vann
中科院分区：
文献类型：
--
作者：
V. Shevchenko;M. de Bock;S. Freethy;A. Saveliev;R. Vann
摘要在MAST中进行了电子伯恩斯坦波发射（EBE）的角扫描。从EBE测量的视角范围内，B-X-O模式转换（MC）窗口的角位置和取向可以估计，给出的MC层中的磁场的俯仰角。相应的MC层的径向位置，发现从汤姆逊散射测量。在若干频率下的测量可以提供桨距角分布。与动态斯塔克效应测量结果相比，从EBE测量的俯仰角轮廓重建的结果。微波成像的B-X-O MC窗口提出作为一种替代角扫描。所提出的方案是基于成像相控阵天线，允许所需的角分辨率。图像采集时间比磁流体动力学（MHD）时间尺度短得多，因此即使在存在MHD活动的情况下，EBE成像也可用于俯仰角测量。
Abstract Angular scanning of electron Bernstein wave emission (EBE) has been conducted in MAST. From EBE measurements over a range of viewing angles, the angular position and orientation of the B-X-O mode conversion (MC) window can be estimated, giving the pitch angle of the magnetic field in the MC layer. The radial position of the corresponding MC layer is found from Thomson scattering measurements. Measurements at several frequencies can provide a pitch angle profile. Results of pitch angle profile reconstruction from EBE measurements are presented in comparison with motional Stark effect measurements. Microwave imaging of the B-X-O MC window is proposed as an alternative to angular scanning. The proposed scheme is based on an imaging phased array of antennas allowing the required angular resolution. Image acquisition time is much shorter than magnetohydrodynamic (MHD) time scales so the EBE imaging can be used for pitch angle measurements even in the presence of MHD activity.