Accession Number : ADA192117

Title :   Basic Processes of Plasma Propulsion.

Descriptive Note : Annual scientific rept. 1 Aug 86-31 Jul 87,

Corporate Author : STUTTGART UNIV (GERMANY F R) INST FUER RAUMFAHRTSYSTEME

Personal Author(s) : Schrade, Herbert O

PDF Url : ADA192117

Report Date : Aug 1987

Pagination or Media Count : 78

Abstract : This report describes the research work on cathode phenomena and presents the development work and the results of several model calculations by means of which the performance of coaxial MPD thrusters can be predicted. Electrode effects like spot formation and spot motion can cause high erosion on the cathode and backplate of an MPD thruster. These effects are qualitatively and partially quantitatively explained by means of a unique theoretical approach. By means of these performance calculations the onset conditions were calculated based on the fact that due to magnetic contraction (pinch effect) the plasma density becomes zero at the anode (onset theory of Hugel). The results of these calculations are in excellent agreement with those of the experiments. Keywords: Magnetoplasmadynamic thruster, Electrode phenomena, Flow arc discharge, Calculations, Onset.

Descriptors :   *MAGNETIC FIELDS, *PLASMAS(PHYSICS), *PROPULSION SYSTEMS, *THRUSTERS, CATHODES, CONTRACTION, DENSITY, ELECTRIC ARCS, ELECTRIC DISCHARGES, ELECTRODES, EROSION, FLOW, METHODOLOGY, MODELS, MOTION, PINCH EFFECT, THEORY

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE