MHD Equilibrium Configuration Reconstructions for HL-2A Tokamak

The EFIT （Equilibrium Fitting） code is modified for the equilibrium configuration reconstruction in HL-2A. Signals from Langmuir probe （LP） at the divertor target plates are employed in the reconstruction of divertor configurations. The results show that discharge #2895 starts with a limiter configu...

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Published inPlasma science & technology Vol. 13; no. 4; pp. 424 - 430
Main Author 何志雄 董家齐 何宏达 蒋海滨 高喆 张锦华
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.08.2011
Subjects
MHD平衡
偏滤器靶板
安全系数
托卡马克
朗缪尔探针
等离子体参数
配置
Online AccessGet full text
ISSN1009-0630
DOI10.1088/1009-0630/13/4/08

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Summary:The EFIT （Equilibrium Fitting） code is modified for the equilibrium configuration reconstruction in HL-2A. Signals from Langmuir probe （LP） at the divertor target plates are employed in the reconstruction of divertor configurations. The results show that discharge #2895 starts with a limiter configuration and develops gradually into a divertor configuration after t = 230 ms. This transition process is clearly demonstrated by the LP signals for the reconstruction. The profiles of plasma parameters such as safety factor q, pressure and current density as well as the evolution of major shape parameters of plasma, such as the boundary magnetic fluxes, the positions of both x-point and magnetic axis, are calculated from the reconstructed configurations. The possibility to apply the method to the swing of strike point on the target plate is discussed.
Bibliography:equilibrium reconstruction, MHD equilibrium, LP signals, HL-2A tokamak
34-1187/TL
The EFIT （Equilibrium Fitting） code is modified for the equilibrium configuration reconstruction in HL-2A. Signals from Langmuir probe （LP） at the divertor target plates are employed in the reconstruction of divertor configurations. The results show that discharge #2895 starts with a limiter configuration and develops gradually into a divertor configuration after t = 230 ms. This transition process is clearly demonstrated by the LP signals for the reconstruction. The profiles of plasma parameters such as safety factor q, pressure and current density as well as the evolution of major shape parameters of plasma, such as the boundary magnetic fluxes, the positions of both x-point and magnetic axis, are calculated from the reconstructed configurations. The possibility to apply the method to the swing of strike point on the target plate is discussed.
HE Zhixiong, DONG Jiaqi , HE Hongda , JIANG Haibin , GAO Zhe , ZHANG Jinhua （1Southwestern Institute of Physics, Chengdu 610041, China ;2Department of Engineering Physics, Tsinghua University, Beijing 100084, China; 3Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310013, China）
ISSN:1009-0630
DOI:10.1088/1009-0630/13/4/08