One-dimensional hybrid model of a stationary plasma thruster

A one-dimensional hybrid model of the dynamics of atoms, ions, and electron s in the channel of a stationary plasma thruster is developed. The relevant set of integrodifferential equations is studied numerically. The results o btained are compared with the results of previous calculations based on a h ydrodynamic model. It is shown that, with the use of one fitting parameter (the channel resistance), the calculated integral characteristics agree wel l with the experimental ones. The current-voltage characteristic is obtaine d. The general features of low-frequency oscillations that have been reveal ed in numerical simulations using the model proposed are also in fairly goo d agreement with experimental results. The value of the electron thermal co nductivity is estimated. (C) 2000 MAIK "Nauka/lnterperiodica".