2023.09.27

A response of the current interchange tearing modes (CITMs) to the two-fluid and gyro-viscous effects is studied numerically. The CITM has been been proposed to explain an intermittent current eruption in tokamak edge region. A response of the CITMs to an externally-imposed flow is also studied. Our numerical simulations show that the growth of a CITM is observed for a relatively small flow velocity (whether a flow is imposed externally or not), bringing out a suppression of the electric current outside the last closed flux surface. It is also found that a columnar or a stripe pattern is formed in the course of the CITM growth.

The numerical simulations were performed on Plasma Simulator of NIFS, Oakforest-PACS (FUJITSU) of the JCAHPC, and Wisteria/BDEC-01 Odyssey (FUJITSU FX1000) of the University of Tokyo.

【Publications】

“Non-ideal MHD growth of current interchange tearing modes at plasma edge and response to externally-imposed flow”, Hideaki Miura, Linjin Zheng, and Wendell Horton, Physics of Plasmas 30 (2023), 052503.
DOI:10.1063/5.0106785