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New technique for levitating solid particles using a proton beam

Published online by Cambridge University Press:  09 March 2009

Nebil Y. Misconi
Nebil Y. Misconi
Affiliation:
Department of Mechanical and Aerospace Engineering, University of Central Florida, 4000 Central Blvd., Orlando, Florida 32816, USA
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Abstract

A new technique for levitating solid particles inside a vacuum chamber is developed using a proton beam. This new technique differs from the classical laser-levitation technique invented by Ashkin in that it does not heat up light-absorbing levitated particles to vaporization. This unique property of the method will make it possible to levitate real interplanetary dust particles in a vacuum chamber and study their spin-up dynamics in a ground-based laboratory. It is found that a flux of protons from a proton gun of ~1015 cm–2 sec–1 is needed to levitate a 10-mm particle. Confinement of the levitated particle can be achieved by a Z or θ pinch to create a gravity well, or by making the beam profile doughnut in shape.

Type
Regular Papers
Information
Laser and Particle Beams , Volume 14 , Issue 3 , September 1996 , pp. 501 - 510
Copyright
Copyright © Cambridge University Press 1996

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