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Characteristics of EMI generated by negative metal-positive dielectric voltage stresses due to spacecraft chargingCharging of spacecraft surfaces by the environmental plasma can result in differential potentials between metallic structure and adjacent dielectric surfaces in which the relative polarity of the voltage stress is either negative dielectric/positive metal or negative metal/positive dielectric. Negative metal/positive dielectric is a stress condition that may arise if relatively large areas of spacecraft surface metals are shadowed from solar UV and/or if the UV intensity is reduced as in the situation in which the spacecraft is entering into or leaving eclipse. The results of experimental studies of negative metal/positive dielectric systems are given. Information is given on: enhanced electron emission I-V curves; e(3) corona noise vs e(3) steady-state current; the localized nature of e(3) and negative metal arc discharge currents; negative metal arc discharges at stress thresholds below 1 kilovolt; negative metal arc discharge characteristics; dependence of blowoff arc discharge current on spacecraft capacitance to space (linear dimension); and damage to second surface mirrors due to negative metal arcs.
Document ID
19850014194
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chaky, R. C. (TRW Space Technology Labs. Redondo Beach, CA, United States)
Inouye, G. T. (TRW Space Technology Labs. Redondo Beach, CA, United States)
Date Acquired
August 12, 2013
Publication Date
March 1, 1985
Publication Information
Publication: NASA. Lewis Research Center Spacecraft Environ. Interactions Technol., 1983
Subject Category
Communications And Radar
Accession Number
85N22505
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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