ELECTROSTATIC ORRERY FOR CELESTIAL MECHANICS

被引：10

作者：

BIEWER, T ^{[1
]}

ALEXANDER, D ^{[1
]}

ROBERTSON, S ^{[1
]}

WALCH, B ^{[1
]}

机构：

[1] UNIV NO COLORADO,DEPT PHYS,GREELEY,CO 80639

来源：

AMERICAN JOURNAL OF PHYSICS | 1994年 / 62卷 / 09期

关键词：

D O I：

10.1119/1.17467

中图分类号：

G40 [教育学];

学科分类号：

040101 ; 120403 ;

摘要：

A device is described in which negatively charged submillimeter particles are trapped in orbits about a rod with a positive potential. Hollow glass microspheres about 50 mum in diameter are dropped past an emitting filament and accumulate a charge of approximately 5 X 10(5) electrons. The microspheres fall into a Kingdon trap (concentric cylinders with end caps) and are trapped by a rising potential of order 10 kV. The orbital decay time is determined by molecular drag and is about 40 min or 10(5) revolutions at 2 X 10(-6) Torr. Orbiting particles are visible to the unaided eye and may be recorded photographically with a CCD camera. Possible applications from celestial mechanics include experiments on orbital resonances, Kirkwood gaps, and planetary ring phenomena.

引用

页码：821 / 828

页数：8

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