1. 1) Arakawa, Y., Kuninaka, H., Nakayama, N. and Nishiyama, K.: Ion Engines for Powered Flight in Space, Corona Publishing, Tokyo, 2006, pp. 18-20 (in Japanese).
2. 2) Hosoda, S. and Kuninaka, H.: The Homeward Journey of Asteroid Explorer ``Hayabusa'' Powered by the Ion Engines, J. Plasma Fusion Res., 86 (2010), pp. 282-293 (in Japanese).
3. 3) Kuninaka, H.: Research and Development of JIEDI (JAXA Ion Engine Development Initiatives) Tool for Numerical Evaluation of Ion Engine Grid Lifetime, JAXA-SP-06-019, 2007, pp. 5-9 (in Japanese).
4. DSMC-PIC Analysis of a Plume from MUSES-C Ion Engines.
5. Three-Dimensional Particle Simulations of Ion-Optics Plasma Flow and Grid Erosion