Millimeter-wave two-dimensional imaging array for the GAMMA 10 tandem mirror
Millimeter-wave two-dimensional imaging array for the GAMMA 10 tandem mirror
复制标题
GAMMA 10串联镜的毫米波二维成像阵列
DOI：
10.1063/1.1147764
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发表时间：
1997
影响因子：
1.6
通讯作者：
K. Mizuno
中科院分区：
文献类型：
--
作者：
N. Oyama;A. Mase;T. Tokuzawa;K. Imamura;A. Itakura;T. Tamano;Y. Harada;K. Mizuno
为了诊断 GAMMA 10 串联镜的塞胞等离子体，我们制作了毫米波二维成像阵列。具有两个独立源的外差系统能够在一次等离子体发射中测量密度和电子回旋发射 (ECE)。该干涉仪成功测量了轴向和径向线密度分布的时间演化，相位分辨率小于1/200条纹，空间分辨率垂直方向为16毫米，水平方向为5毫米。结果表明，由于在塞/势垒单元和中心单元处注入电子回旋共振加热，阿贝尔倒转密度分布发生了变化。同时观察势垒区产生的热电子发射的二次谐波ECE的轴向和径向依赖性。将 ECE 信号的波动谱与远前散射诊断系统获得的波动谱进行比较。
A millimeter-wave two-dimensional imaging array has been fabricated in order to diagnose the plug-cell plasma of the GAMMA 10 tandem mirror. The heterodyne system with two separate sources enables the measurement of density and electron cyclotron emission (ECE) in one plasma shot. The interferometer successfully measures the time evolution of the axial and radial line-density profiles with phase resolution less than 1/200 fringe and spatial resolution of 16 mm in the vertical direction and 5 mm in the horizontal one. It is shown that the Abel-inverted density profiles are changed due to the injection of electron-cyclotron-resonance heating at the plug/barrier cells and central cell. The axial and radial dependence of the second-harmonic ECE emitted from hot electrons produced in barrier region is observed simultaneously. The fluctuation spectra of the ECE signals are compared with those obtained from the far-forward scattering diagnostic system.