Ida K, Kobayashi T, Yoshinuma M, Akiyama T, Tokuzawa T, Tsuchiya H, Itoh K, Itoh S-I
National Institute for Fusion Science, National Institutes of Natural Sciences, Toki, 509-5292, Japan.
SOKENDAI (The Graduate University for Advanced Studies), 322-6 Oroshi, Toki, Gifu, 509-5292, Japan.
Sci Rep. 2018 Feb 12;8(1):2804. doi: 10.1038/s41598-018-21128-z.
Interaction between a quasi-stable stationary MHD mode and a tongue-shaped deformation is observed in the toroidal plasma with energetic particle driven MHD bursts. The quasi-stable stationary 1/1 MHD mode with interchange parity appears near the resonant rational surface of q = 1 between MHD bursts. The tongue-shaped deformation rapidly appears at the non-resonant non-rational surface as a localized large plasma displacement and then collapses (tongue event). It curbs the stationary 1/1 MHD mode and then triggers the collapse of energetic particle and magnetic field reconnection. The rotating 1/1 MHD mode with tearing parity at the q = 1 resonant surface, namely, the MHD burst, is excited after the tongue event.
在具有高能粒子驱动磁流体动力学爆发的环形等离子体中，观测到一种准稳态静止磁流体动力学模式与舌状形变之间的相互作用。具有交换宇称的准稳态静止1/1磁流体动力学模式在磁流体动力学爆发之间出现在q = 1的共振有理面附近。舌状形变作为局部大等离子体位移迅速出现在非共振非有理面，然后崩塌（舌状事件）。它抑制了静止的1/1磁流体动力学模式，进而引发高能粒子的崩塌和磁场重联。舌状事件之后，在q = 1共振面激发具有撕裂宇称的旋转1/1磁流体动力学模式，即磁流体动力学爆发。
