1. 1. S. Tshukamoto, T. Maeda, M. Ikeda and H. Akiyama, J. Plasma Fusion Res, 79 (2003) 39.
2. 2. K. Takagi and A. Ihara, Journal of IEEJ, 129 (2009) 439.
3. 3. N. Hayashi and Y. Akiyoshi, Journal of IAPS, 20 (2012).
4. 4. S. Kitazaki, K. Koga, M. Shiratani, and N. Hayashi, , Japanese Journal of Applied Physics, 51 (2012) 01AE01.
5. 5. T. Nozaki, K. Takaki, T. Namihira, K. Kitano, J. Kim, S. Nomura, N. Ichikawa, H. Tomita, N. Hayashi and T. Iwao, J. Plasma Fusion Res., 83 (2007).