Observation of blobs using a gas puff imaging diagnostic on the HL-2A tokamak
Observation of blobs using a gas puff imaging diagnostic on the HL-2A tokamak
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使用 HL-2A 托卡马克上的气体喷射成像诊断观察斑点
DOI：
10.1088/2058-6272/ab0b29
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发表时间：
2019
影响因子：
1.7
通讯作者：
Yue Wei
中科院分区：
文献类型：
--
作者：
Yuan Jinbang;Yuan Boda;Xu Min;Yu Yi;Nie Lin;Ke Rui;Wang Zhanhui;Gong Shaobo;Wu Ting;Wu Yifan;Long Ting;Wang Huajie;Liu Hao;Yue Wei
在HL-2A装置上研制了一种用于边缘等离子体湍流测量的喷气成像（GPI）诊断装置。介绍了GPI的原理和实验装置。GPI应用于调查边缘和刮除层中的斑点。GPI线发射强度的统计特性的计算，包括概率密度函数（PDF），偏度，峰度的强度，这是一致的朗缪尔探针的测量。此外，斑点的运动轨迹记录的时间序列的个别帧。给出了原始图像和相对高频（> 10 kHz）/低频（1-10 kHz）分量图像的特征。对团块结构和高速运动的观测证明了GPI诊断的成功性和高性能。
A gas puff imaging (GPI) diagnostic has been developed and applied to measure edge plasma turbulence on the HL-2A tokamak. The principle and experimental setup of GPI are described. GPI is applied to investigate blobs in the edge and scrape-off layer. Statistical characterizations of GPI line emission intensity are calculated, including the probability density functions (PDFs), skewness, and kurtosis of the intensity, which are found to be consistent with measurements by Langmuir probes. Besides, the track of blob motions is recorded by time sequence of individual frames. The characteristics of the original images and the relatively high-frequency (> 10 kHz)/low-frequency (1–10 kHz) component images are illustrated. The observation of the blob's structures and high-speed motions proves the success and high performance of the GPI diagnostic.