MHD Equilibrium Configuration Reconstructions for HL-2A Tokamak

HE Zhixiong; DONG Jiaqi; HE Hongda; JIANG Haibin; GAO Zhe; ZHANG Jinhua

Plasma Science and Technology > 2011 > 13(4): 424-430.

HE Zhixiong, DONG Jiaqi, HE Hongda, JIANG Haibin, GAO Zhe, ZHANG Jinhua. MHD Equilibrium Configuration Reconstructions for HL-2A Tokamak[J]. Plasma Science and Technology, 2011, 13(4): 424-430.

Citation:

HE Zhixiong, DONG Jiaqi, HE Hongda, JIANG Haibin, GAO Zhe, ZHANG Jinhua. MHD Equilibrium Configuration Reconstructions for HL-2A Tokamak[J]. Plasma Science and Technology, 2011, 13(4): 424-430.

Citation:

HE Zhixiong, DONG Jiaqi, HE Hongda, JIANG Haibin, GAO Zhe, ZHANG Jinhua. MHD Equilibrium Configuration Reconstructions for HL-2A Tokamak[J]. Plasma Science and Technology, 2011, 13(4): 424-430.

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MHD Equilibrium Configuration Reconstructions for HL-2A Tokamak

1 Southwestern Institute of Physics, Chengdu 610041, China 2 Department of Engineering Physics, Tsinghua University, Beijing 100084, China 3 Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310013, China

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Received Date: August 18, 2010

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Abstract

Abstract

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=230ms. 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.
- equilibrium reconstruction,
- MHD equilibrium,
- LP signals,
- HL-2A tokamak

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