NDLI: Assessment of deep dielectric discharging in spacecraft

Content Provider	IEEE Xplore Digital Library
Author	Bowman, C.
Copyright Year	1996
Description	Author affiliation: Martin-Marietta Astro & Space, Princeton, NJ, USA (Bowman, C.)
Abstract	Summary form only given. Charging of spacecraft by magnetospheric plasma can produce discharging, which is one possible cause of anomalous operation. On communications satellites in geosynchronous orbit, the discharge-induced anomalies divide into two categories: those possibly caused by surface charging, in medium-energy plasma clouds in the midnight-to-dawn sector, and those caused by deep dielectric discharging by high energy electrons, which can generally be more harmful and are evenly distributed around the geosynchronous arc and either correlated or anticorrelated with the cycle of equinoxes. Current-generation technology allows for prevention of surface discharging by the use of conductive coatings on all spacecraft surfaces. Mitigation of deep charging effects is an underdeveloped area of technology. The authors have difficulty even understanding the phenomenology of destructive internal discharging. To further this understanding, some promising methods of instrumentation have been suggested, to detect either surface or deep dielectric charging. These sensors will gather in-flight data to identify at-risk components and systems and to determine whether the commonly employed preventive methods (shielding, grounding or exposed metal) are effective in operation. The types of sensors are reviewed and some existing results are interpreted. For on-orbit satellites it may be possible to discriminate between deep dielectric discharging effects and surface discharging effects by combining the results of the two types of sensors with time of year and orbital position.
File Size	128806
File Format	PDF
ISBN	0780333225
ISSN	07309244
DOI	10.1109/PLASMA.1996.551461
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-06-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dielectrics Space vehicles Surface charging Surface discharges Plasmas Space technology Magnetosphere Artificial satellites Clouds Electrons
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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