Interactions of drift wave turbulence with streamer flows in wave-kinetic formalism
Year: 2021
Type: article
Abstract: Interaction between drift wave turbulence and streamer flow in magnetized plasmas is investigated in the framework of wave-kinetic theory. By performing a wave-kinetic simulation of turbulence coupling with the streamer flow, the role of the phase-space dynamics of turbulence is clarified. Here, the phase-space consists of the real space and wavenumber space. As a consequence of the phase-space dynamics, the turbulence is trapped in the flow and propagates with the streamer. Because of the trapping, the asymmetry of the turbulence intensity with respect to the sign of the flow curvature appears. The trajectories of the turbulence wave-packet, which are the characteristic curves of the wave-kinetic solution, can be categorized by the trapping, passing, and scattering. Therefore, the obtained phase-space structure of the turbulence can be understood by their trajectories. The propagation direction and speed are found to be governed by the turbulence spectrum. The obtained characteristics can be explained by the theoretical analysis.
Source: Physics of Plasmas
DOI: 10.1063/5.0059839
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: 非平衡プラズマの強相関乱流, プラズマ乱流におけるスケール混合を伴う構造形成, Three-dimensional structure and dynamic response of streamers in plasma turbulence, Quantitative model for transport barrier formation of H-mode in toroidal plasmas, Plasma Turbulence Obseravation System (PLATOS) for puzzling out the principles of structural formation and functional expression in turbulent plasmas, Research on dynamical response of transport barrier in magnetically-confined plasma
OpenAlex ID: W3206028244