Japan Geoscience Union Meeting 2023

Presentation information

[J] Online Poster

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM17] Space Plasma Physics: Theory and Simulation

Tue. May 23, 2023 9:00 AM - 10:30 AM Online Poster Zoom Room (2) (Online Poster)

convener:Takanobu Amano(Department of Earth and Planetary Science, University of Tokyo), Yohei Miyake(Graduate School of System Informatics, Kobe University), Takayuki Umeda(Institute for Space-Earth Environmental Research, Nagoya University), Tadas Nakamura(Fukui Prefectural University)

On-site poster schedule(2023/5/22 17:15-18:45)

9:00 AM - 10:30 AM

[PEM17-P11] Waves in kinetic scale turbulence generated from decaying Alfvén mode turbulence: Fully kinetic particle-in-cell simulation

*Shinji Saito1 (1.National Institute of Information and Communications Technology)

Nature of kinetic scale turbulence has an important role to dissipate plasma turbulence through turbulent energy cascade from magnetohydrodynamics scales. To understand the nature of plasma turbulence generated through the turbulent cascade, a two-dimensional particle-in-cell simulation of decaying Alfvén mode turbulence has been carried out on a collisionless, homogeneous, magnetized low-beta plasma model. Superimpose of linearly polarized Alfvén mode fluctuations are initially applied as an almost isotropic narrowband spectrum at scales longer than the ion inertial length. The simulation shows that the Alfvén mode fluctuations generate several electromagnetic/electrostatic fluctuations at kinetic scales. These fluctuations show nature of magnetosonic/whistler mode waves, Alfvén/ion cyclotron mode waves, and ion acoustic mode waves. Magnetic fluctuations are present on dispersion curve of kinetic Alfvén mode waves, but they are weak compared with other mode waves.