Japan Geoscience Union Meeting 2015

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Poster

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

[P-EM26] Space Plasma Physics: Theory and Simulation

Sun. May 24, 2015 6:15 PM - 7:30 PM Convention Hall (2F)

Convener:*Takayuki Umeda(Solar-Terrestrial Environment Laboratory, Nagoya University), Takanobu Amano(Department of Earth and Planetary Science, University of Tokyo), Yasuhiro Nariyuki(Faculty of Human Development, University of Toyama), Tooru Sugiyama(Japan Agency for Marine-Earth Science and Technology Center for Earth Information Science and Technology), Tadas Nakamura(Fukui Prefectural University)

6:15 PM - 7:30 PM

[PEM26-P04] PIC simulations on magnetic perturbation around the Solar Probe Plus spacecraft

*Yuji FUNAKI1, Keisuke KIKURA1, Yohei MIYAKE1, Hideyuki USUI1 (1.Graduate School of System Informatics, Kobe University)

Keywords:spacecraft-plasma interaction, solar coronal plasma, spacecraft charging, photoelectron emission, magnetic perturbation, PIC simulation

For future space exploration, it is necessary to predict the nature of spacecraft-plasma interactions in extreme plasma environmental conditions. As one of such activities, we study on the physics of spacecraft-plasma interactions in the near-Sun environment. The spacecraft environment immersed in the solar corona is characterized by the small Debye length due to its high density (7000 /cc) and a large photo-/secondary electron emission current emitted from the spacecraft surfaces, which lead to much different nature of spacecraft-plasma interactions from that in the near-Earth environment. Consequently, the spacecraft charges negatively near the Sun unlike usual photo-emitting spacecraft in the near-Earth environment. In the present study, we reproduce the plasma environment around the Solar Probe Plus satellite planned by NASA by means of numerical simulations based on the Particle-in-cell method. We report recent research progress on near-spacecraft magnetic perturbations, which is generated by a complex current closure around the spacecraft.