1. T. H. Stix,The Theory of Plasma Waves(McGraw-Hill Book Company, Inc., New York, 1962).
2. R. N. Seitz, R. D. Shelton, and E. Stuhlinger,Electrostatic Propulsion(Academic Press Inc., New York (1961).
3. L. D. Pearlstein, M. N. Rosenbluth, and G. W. Stuart,Electric Propulsion Development(Academic Press Inc., New York, 1963).
4. Note that the orbit variabletis a function ofEthrough Eq. (11).