Accession Number : ADA293654

Title :   Beam-Centroid Tracking Instrument for Ion Thrusters.

Descriptive Note : Technical rept.,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA

Personal Author(s) : Pollard, J. E.

PDF Url : ADA293654

Report Date : 20 MAR 1995

Pagination or Media Count : 11

Abstract : Thrust vector stability for an electrostatic ion engine can be measured with improved sensitivity and time resolution by the method described here. Four double-wire Langmuir probes, aligned in the form of a cross, are placed in the exhaust plume and are translated by a motorized positioning system to balance the currents collected along two orthogonal axes. The thrust vector position is thereby measured with an angular resolution of <0.01 deg and a response time of <5 s.

Descriptors :   *EXHAUST PLUMES, *ION ENGINES, ANGLES, IONS, STABILITY, RESOLUTION, LANGMUIR PROBES, XENON, THRUSTERS, THRUST VECTOR CONTROL SYSTEMS, ELECTROSTATICS, ORTHOGONALITY.

Subject Categories : Electric and Ion Propulsion

Distribution Statement : APPROVED FOR PUBLIC RELEASE