Steady-state confinement of electron plasmas using trivelpiece-gould modes excited by a 'rotating wall'

Journal Article · Fri Jan 15 04:00:00 EST 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.57466· OSTI ID:21207936

Anderegg, F; Hollmann, E M; Driscoll, C F ^[1]

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1. Department of Physics and Institute for Pure and Applied Physical Sciences, University of California at San Diego, la Jolla, California 92093-0319 (United States)

A 'rotating wall' electric field can give steady-state confinement of more than 10{sup 9} charges in a Penning-Malmberg trap at 4 Tesla. For both pure ion plasmas and pure electron plasmas, the torque exerted on the plasma by the rotating wall exhibits peaks at the frequencies of k{sub z}{ne}0 Trivelpiece-Gould modes. As expected, modes with {omega}>{omega}{sub R} (i.e. propagating faster than the plasma rotation) give positive torque and cause plasma compression; and modes with {omega}<{omega}{sub R} give adverse torque and cause plasma expansion. By increasing the frequency of the rotating wall, we observed a plasma central density compression of about a factor of 20. These techniques may be useful for a variety of trapping experiments.

• OSTI ID: 21207936
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 457; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPRESSION
ELECTRIC FIELDS
ELECTRONS
MAGNETIC FIELDS
PLASMA CONFINEMENT
PLASMA DENSITY
PLASMA EXPANSION
ROTATING PLASMA
ROTATION
STEADY-STATE CONDITIONS
TORQUE
TRAPPING