A simulation environment to simulate lower-hybrid-wave-driven plasmas efficiently
| Autor: | Yusuke Yoshida, Takahiro Shinya, Akira Ejiri, Yuichi Takase, Naoto Tsujii, S. Yajima, Yasushi Todo, B. Roidl |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Tokamak Wave propagation MHD Self-consistent equilibrium General Physics and Astronomy Ray tracing Plasma Spherical tokamak Currentdrive Lower hybrid oscillation Fokker–Planck 01 natural sciences 010305 fluids & plasmas Computational physics law.invention Distribution function Hardware and Architecture law Physics::Plasma Physics 0103 physical sciences Fokker–Planck equation Magnetohydrodynamics Lower-hybrid wave 010306 general physics |
| Zdroj: | Benedikt Roidl, Yasushi Todo, Yuichi Takase, Naoto Tsujii, Akira Ejiri, Yusuke Yoshida, Satoru Yajima, Takahiro Shinya, A simulation environment to simulate lower-hybrid-wave-driven plasmas efficiently, Computer Physics Communications, Volume 230, 2018, Pages 38-49 |
| ISSN: | 0010-4655 |
| Popis: | In this study a hybrid simulation environment to investigate the lower-hybrid-wave-driven tokamak plasmas is presented, and its application to the spherical tokamak TST-2 is described. These plasma are formed and driven by radio-frequency waves without the use of the central solenoid, and are characterized by low density and low magnetic field. A hybrid simulation environment which is divided into two groups, one using magneto-hydrodynamic (MHD) as well as particle-in-cell (PIC) approaches, and the second group using ray-tracing and Fokker–Planck solvers, is applied to describe the behavior of energetic electrons, bulk plasma, wave propagation, and the wave-particle interaction. Both groups of solvers can be coupled via the energetic-particle velocity distribution function and the equilibrium conditions of magnetic field, pressure, and density profiles to obtain a self-consistent solution. First results show the impact of a self-consistent equilibrium on ray trajectories and current density profiles. Therefore, new insights in lower-hybrid-wave-driven plasmas of TST-2 can be obtained using the proposed hybrid simulation environment. |
| Databáze: | OpenAIRE |
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