3-D Fully Kinetic Particle-In-Cell Simulations of Small Asteroid Charging in the Solar Wind
This paper presents a 3-D, fully kinetic particle-in-cell (PIC) simulation study of plasma charging for small, irregularly shaped, composite asteroids in the solar wind. Three types of asteroid internal structures are considered: 1) a homogeneous composition of regolith; 2) a single hard rock; and 3) a composite of hard rock core covered with a regolith outer layer. The simulation model resolves the plasma flow field, asteroid surface differential charging, and asteroid internal electric field self-consistently. The results show that while the ambient plasma condition and surface property determine surface charging, the internal composition substantially affects the subsurface electric field inside an asteroid.
D. F. Han and J. Wang, "3-D Fully Kinetic Particle-In-Cell Simulations of Small Asteroid Charging in the Solar Wind," IEEE Transactions on Plasma Science, vol. 47, no. 8, pp. 3682-3688, Institute of Electrical and Electronics Engineers (IEEE), Aug 2019.
The definitive version is available at https://doi.org/10.1109/TPS.2019.2919895
Mechanical and Aerospace Engineering
Keywords and Phrases
Asteroid; plasma charging; solar wind
International Standard Serial Number (ISSN)
Article - Journal
© 2019 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
01 Aug 2019