1. 1) Sankovic, J.M. and Dunning, J.W., Jr.: An Overview of Current NASA Activities in Electric Propulsion Technology, Proc. 26th Int. Electric Propulsion Conf., 1999, pp. 19-26.
2. 2) Spanjers, G.G., Schilling, J.H., Engelman, S.F., Dulligan, M.J., Bromaghim, D.R. and Johnson, L.K.: Contamination Analysis from the ESEX 26kW Ammonia Arcjet Flight Experiment, Proc. 26th Int. Electric Propulsion Conf., 1999, pp. 249-269.
3. 3) Curran, F.M.: Electric Propulsion in U.S. Industry, Proc. 26th Int. Electric Propulsion Conf., 1999, pp. 1-7.
4. 6) Ogiwara, K., Hosoda, S., Suzuki, T., Toki, K., Kuriki, K., Matsuo, S., Nanri, H. and Nagano, H.: Development and Testing of a 300W-Class Arcjet, 24th Int. Electric Propulsion Conf., 1995, pp. 144-152.
5. 8) Riehle, M., Kurtz, H.L. and Auweter-Kurtz, M.: High Specific Impulse Experiments with 1.5 and 5-kW Thermal Arcjets, Proc. 23rd Int. Electric Propulsion Conf., 1993, pp. 1934-1948.