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首页> 外文期刊>Plasma and Fusion Research >Measurement of Spatiotemporal Structures of Density Fluctuations Using Two-Directional Beam Emission Spectroscopy in LHD
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Measurement of Spatiotemporal Structures of Density Fluctuations Using Two-Directional Beam Emission Spectroscopy in LHD

机译：左旋二向光束发射光谱法测量密度波动的时空结构

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A beam emission spectroscopy (BES) system for density fluctuation measurements having the sight lines passing through the plasma in the toroidal direction was developed in the Large Helical Device (LHD). The coverage of the area sampled by 15 × 100 optical fibers is nearly from the core to the edge on the horizontally elongated poloidal cross section with the spatial pitch of around 1.0 cm, and 32 channels is detected simultaneously with the 4 × 8 pixel Avalanche Photodiode Detector camera. In order to improve the directional sensitivity for the propagation of the density fluctuation in the radial direction or the poloidal direction, we propose the use of slit-shaped sight lines. An initial result of the density fluctuation measurements for MHD activity in the edge region and its cross-correlation analysis is presented.
机译：在大型螺旋装置（LHD）中开发了一种用于密度波动测量的束发射光谱（BES）系统，其视线沿环形方向穿过等离子体。 15×100光纤采样的区域的覆盖范围几乎是从核心到水平伸长的多倍体截面的边缘，空间间距约为1.0 cm，并且使用4×8像素雪崩光电二极管同时检测到32个通道探测器摄像机。为了提高在径向或极向上传播密度波动的方向敏感性，我们建议使用狭缝形视线。给出了边缘区域MHD活动的密度波动测量的初始结果及其互相关分析。

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