Non-Resonant Dynamic Stabilization of the m = 1 Diocotron Mode

Journal Article · Wed Jun 16 04:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3460122· OSTI ID:21366936

Maero, G ^[1]; Paroli, B ^[2]; Pozzoli, R; Rome, M ^[2]

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1. Dipartimento di Fisica, Universita degli Studi di Milano, Via Celoria 16, 20133 Milano (Italy)
2. INFN Sezione di Milano and Dipartimento di Fisica, Universita degli Studi di Milano, Via Celoria 16, 20133 Milano (Italy)

The m = 1 diocotron mode of a nonneutral plasma column confined in a Malmberg-Penning trap, i.e. the rotation of the plasma center-of-charge around the longitudinal symmetry axis, is experimentally found to be unstable. We have investigated in the ELTRAP device a control mechanism of the radial drift of the column based on a Radio Frequency drive applied on an azimuthally sectored electrode of the trap. Systematic experiments show the characteristic features of the mechanism, namely the presence of amplitude and frequency thresholds as well as the non-resonant behavior, whose interpretation invokes the concept of dynamic stabilization.

• OSTI ID: 21366936
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1242; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
CONTROL SYSTEMS
DIFFERENTIAL EQUATIONS
ELECTRODES
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUATIONS
EQUIPMENT
IONIZATION
MOTION
OSCILLATORS
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA
PLASMA DENSITY
POISSON EQUATION
RADIATIONS
RADIOWAVE RADIATION
ROTATION
STABILIZATION
SYMMETRY
TRAPS