NDLI: Puncture discharges in surface dielectrics as contaminant sources in spacecraft environments

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Puncture discharges in surface dielectrics as contaminant sources in spacecraft environments

Content Provider	NASA Technical Reports Server (NTRS)
Author	Yadlowsky, E. J. Churchill, R. J. Hazelton, R. C.
Copyright Year	1978
Description	Spacecraft in geosynchronous orbits are known to become charged to large negative potentials during the local midnight region of the satellite orbit. Such discharges have been studied by the electron beam irradiation of dielectric samples in a vacuum environment. In addition to static measurements and photographic examination of the puncture discharges in Teflon samples, the transient characteristics of the electrical discharges are determined from oscillographs of voltage and current and by charged particle measurements employing a biased Faraday cup and a retarding potential analyzer. Using these latter techniques, studies of angular and energy distributions of charged particles have indicated an initial burst of high energy electrons (5 x 10 to the 13th power per discharge at energies greater than 300 eV) followed by a less intense burst of lower energy negative particles. Positive ions are emitted from the discharge site in an initial high velocity burst followed by a lower velocity burst tentatively identified as carbon.
File Size	2859863
Page Count	26
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19780016516
Archival Resource Key	ark:/13960/t6g20sj3m
Language	English
Publisher Date	1978-01-01
Access Restriction	Open
Subject Keyword	Electronics And Electrical Engineering Electromagnetic Interference Electron Irradiation Spacecraft Charging Spacecraft Contamination Electric Discharges Dielectrics Space Environment Simulation Ion Emission Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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