MHD Equilibrium Configuration Reconstructions for HL-2A Tokamak

• 作者: 何宏达 何志雄 张锦华 董家齐 蒋海滨 高喆
• 来源期刊: 等离子体科学和技术：英文版
• 学科: 工学
• 关键词: MHD平衡 配置 托卡马克 HL 偏滤器靶板 等离子体参数 朗缪尔探针 安全系数
• 年，卷（期）: 2011,（4）
• 页码范围: 424-430
• 页数: 7页
• 分类号: TL612|TL631.24
• 语种: 英文

摘要

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.