Numerical simulations of interchange/tearing instabilities in 2D slab with a numerical model for edge plasma

作者：Miura Hideaki^*; Zheng Linjin; Horton Wendell

来源：Physics of Plasmas, 2017, 24(9): 092111.

DOI：10.1063/1.4993962

Numerical simulations of interchange/tearing instabilities in a 2D slab with a numerical model for edge plasma resistivity are carried out. Plasma outside the Last Closed Flux Surface (LCFS), or the scrape-off layer (SOL), can be characterized by open magnetic fields which terminate on the divertor plates in the outside. A numerical model with current diffusivity is developed to enforce a lowlevel saturated current profile in the SOL region as well as a current jump across the LCFS. The numerical simulations show that interchange modes can transform into tearing modes, as the current-interchange tearing modes which has been proposed by Zheng and Furukawa [Phys. Plasmas 17, 052508 (2010)]. An applicability of the model to the tokamak edge stability and ELM studies is discussed. Published by AIP Publishing.

• 出版日期2017-9