2) For example, G. F. Tonon: IEEE Trans. Nucl. Sci. 19 (1972) 172.
3) M. Tanimoto, A. Kitsunezaki and T. Sekiguchi: J. Phys. E 5 (1972) 27.
6) K. N. Sato, S. Okada, S. Kogoshi, S. Sudo, H. Tsuji, Y. Ohwadano, T. Sekiguchi, M. Katsurai and H. Tanaka: Proc. 6th Int. Conf. on Plasma Physics and Controlled Nuclear Fusion, Berchtesgaden, Oct. 1976, Nucl. Fusion 17 (1977) Suppl., p. 567.
8) K. N. Sato, S. Okada, S. Kogoshi, S. Sudo, H. Tsuji, Y. Ohwadano and T. Sekiguchi: Proc. 4th Workshop of Laser Interaction and Related Plasma Phenomena (Plenum, New York, 1978) Vol. 4A, p. 333.