首页|Development of a 2D spatial displacement estimation method for turbulence velocime-try of the gas puff imaging system on EAST

Development of a 2D spatial displacement estimation method for turbulence velocime-try of the gas puff imaging system on EAST

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A gas puff imaging(GPI)diagnostic has been developed and operated on EAST since 2012,and the time-delay estimation(TDE)method is used to derive the propagation velocity of fluctuations from the two-dimensional GPI data.However,with the TDE method it is difficult to analyze the data with fast transient events,such as edge-localized mode(ELM).Consequently,a method called the spatial displacement estimation(SDE)algorithm is developed to estimate the turbulence velocity with high temporal resolution.Based on the SDE algorithm,we make some improvements,including an adaptive median filter and super-resolution technology.After the development of the algorithm,a straight-line movement and a curved-line movement are used to test the accuracy of the algorithm,and the calculated speed agrees well with preset speed.This SDE algorithm is applied to the EAST GPI data analysis,and the derived propagation velocity of turbulence is consistent with that from the TDE method,but with much higher temporal resolution.

gas puff imagingspatial displacement estimationSDEedge turbulence velocityTDEEAST tokamak

李乐天、刘少承、颜宁、刘晓菊、高翔

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Anhui University,Hefei 230039,People's Republic of China

Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People's Republic of China

National Magnetic Confinement Fusion Energy Research and Development Program of ChinaNational Magnetic Confinement Fusion Energy Research and Development Program of ChinaNational Magnetic Confinement Fusion Energy Research and Development Program of China国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金Science Foundation of Institute of Plasma Physics,Chinese Academy of SciencesCollaborative Innovation Program of Hefei Science Center,Chinese Academy of SciencesUsers with Excellence Program of Hefei Science Center,Chinese Academy of SciencesUsers with Excellence Program of Hefei Science Center,Chinese Academy of Sciences

2022YFE030300012022YFE030200042022YFE 0305000312275310119752751217527711975271DSJJ-2021-012021HSC-CIP0192021HSC-UE0142021HSC-UE012

2024

10.1088/2058-6272/ad0c24

等离子体科学和技术(英文版)
中国科学院合肥物质科学研究所 中国力学学会

等离子体科学和技术(英文版)

EI
影响因子：0.297
ISSN：1009-0630
年,卷(期)：2024.26(3)
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