Accession Number : ADA472799


Title :   Charge Control of Geosynchronous Spacecraft Using Field Effect Emitters


Descriptive Note : Conference paper


Corporate Author : SCIENCE APPLICATIONS INTERNATIONAL CORP SAN DIEGO CA


Personal Author(s) : Mandell, M. J. ; Davis, V. A. ; Gardner, B. M. ; Wong, F. K. ; Adamo, R. C. ; Cooke, D. L. ; Wheelock, A. T.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA472799


Report Date : JAN 2007


Pagination or Media Count : 13


Abstract : *Space Systems Loral is conducting an lR&D program to determine the feasibility and effectiveness of field effect electron emitters for potential control of geosynchronous altitude spacecraft. This electron emitters will be based on Spindt Cathode Field Emission Array Technologies. The configuration studied here consists of two emitters, each with an area of about 1 cm2 and emitting up to 1 mA of electrons at approximately 50eV energy. We show that it appears feasible to use electron emitters to control the surface charge of a satellite. Results concerning the placement and effectiveness of emitters and the spacecraft potential configuration under substorm conditions with and without emitter operations in sunlight, in eclipse, and during eclipse exit.


Descriptors :   *SPACECRAFT , *ELECTRON EMISSION , *SPACECRAFT CHARGING , SYMPOSIA , SPACE SYSTEMS , CONFIGURATIONS , STATIC ELECTRICITY , SUNLIGHT , ALTITUDE , PLASMAS(PHYSICS) , ELECTRONS , FIELD EMISSION


Subject Categories : NUCLEAR PHYSICS & ELEMENTARY PARTICLE PHYSICS
      ASTRONAUTICS


Distribution Statement : APPROVED FOR PUBLIC RELEASE