Turbulence imaging and applications using beam emission spectroscopy on DIII-D (invited)
Turbulence imaging and applications using beam emission spectroscopy on DIII-D (invited)
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DOI：
10.1063/1.1535248
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发表时间：
2003-03
影响因子：
1.6
通讯作者：
G. McKee;C. Fenzi;R. Fonck;M. Jakubowski
中科院分区：
文献类型：
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作者：
G. McKee;C. Fenzi;R. Fonck;M. Jakubowski
利用束流发射光谱（BES）诊断系统，对DIII-D托卡马克径向和极向平面的密度涨落进行了二维测量。其目标是可视化湍流涡旋的空间结构和时间演化，以及获得湍流的二维统计特性。的测量获得与本地BES空间通道的阵列配置为图像的等离子体的中平面区域。已经部署了32个通道，每个通道在径向和极向方向上的空间分辨率约为1 cm，从而提供波数范围0<k ≤ 3 cm−1的湍流测量。5（径向）×6（极向）通道网格在1 MHz的采样频率下提供靠近外部中平面的时间分辨图像，从而提供适度空间分辨率、高通量、高时间分辨率的湍流成像系统。图像和由此产生的电影有广泛的应用，以各种各样的基本湍流研究：成像…
Two-dimensional measurements of density fluctuations are obtained in the radial and poloidal plane of the DIII-D tokamak with the Beam Emission Spectroscopy (BES) diagnostic system. The goals are to visualize the spatial structure and time evolution of turbulent eddies, as well as to obtain the 2D statistical properties of turbulence. The measurements are obtained with an array of localized BES spatial channels configured to image a midplane region of the plasma. 32 channels have been deployed, each with a spatial resolution of about 1 cm in the radial and poloidal directions, thus providing measurements of turbulence in the wave number range 0<k⊥⩽3 cm−1. A 5 (radial)×6 (poloidal) channel grid provides time-resolved images near the outer midplane at the sampling frequency of 1 MHz, thus providing a modest spatial resolution, high throughput, high time resolution turbulence imaging system. The images and resulting movies have broad application to a wide variety of fundamental turbulence studies: imaging of...