1. Further evaluation of the high intensity plasma sputter heavy negative ion source
2. Negative metal ion sources (invited)
3. A. Takagi, Y. Mori, Z. Igarashi , C. Kubota, and S. Fukumoto, Proceedings of the 3rd International Symposium on Production and Neutralization of Negative Ions and Beams, AIP Conf. Proc. APCPCSNo. 111 (AIP, New York, 1984), p. 520.
4. Y. Mori, A. Takagi, K. Ikegami, and S. Fukumoto, Proceedings of the 4th International Symposium on Production and Neutralization of Negative Ions and Beams, AIP Conf. Proc. APCPCSNo. 158 (AIP, New York, 1987), p. 378.
5. A versatile high intensity plasma sputter heavy negative ion source