NDLI: Ion field emission from micrometer-sized spherical glass grains

Content Provider	IEEE Xplore Digital Library
Author	Sternovsky, Z. Nemecek, Z. Safrankova, J. Velyhan, A.
Copyright Year	1973
Abstract	An experimental investigation of ion field emission from spherical glass grains in a 1-10 /spl mu/m size range is described. A single dust grain is trapped in an electrodynamic quadrupole and charged positively by a monoenergetic ion beam. The energy of these ions (5 keV) results in a high surface potential and high electric field intensity. A limitation of the surface potential due to ion field emission was observed for the surface field intensity of 3/spl times/10/sup 8/ V/m, which is a considerably lower value than expected. The density of the discharging current was as high as 10/sup -5/ A/m/sup 2/, and increased exponentially with increasing intensity of the electric field. As there are no data of the ion field emission from insulators, we have used the zinc grains for a comparison. Taking into account the irregular shape of used metallic grains, we conclude that the ion field emission from the glass grains starts at a significantly (two orders of magnitude) lower electric field intensity than that from metals. This may lead to the limitation of the attainable surface potential of small insulator grains. The possible effect of the ion field emission on the charging of dust grains in the interplanetary space is discussed.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	292
Ending Page	297
Page Count	6
File Size	644932
File Format	PDF
ISSN	00933813
Volume Number	29
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Glass Surface discharges Insulation Electrodynamics Ion beams Electric potential Zinc Shape Surface charging Space charge
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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