The effect of externally applied oscillating electric fields on the l =1 and l =2 diocotron modes in non-neutral plasmas

Journal Article · Mon Oct 01 00:00:00 EDT 1990 · Physics of Fluids B; (USA)

DOI:https://doi.org/10.1063/1.859495· OSTI ID:6280980

Spencer, R L ^[1]

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1. Department of Physics and Astronomy, Brigham Young University, Provo, UT (USA)

A high-frequency oscillating electric field can change the properties of diocotron modes in non-neutral plasmas. The effect depends crucially on the azimuthal mode number, {ital m}, of the applied field. For {ital m}=0,{plus minus}1 there is no effect, and for applied standing waves there is also no effect. But if the applied field has the form of a traveling wave with {vert bar}{ital m}{vert bar}{ge}2, the frequency of stable diocotron modes can be modified and for {vert bar}{ital m}{vert bar}{ge}3, the {ital l}=2 instability of hollow density profiles can be stabilized. The analytic results are verified with a nonlinear fluid simulation of an infinitely long non-neutral plasma.

• OSTI ID: 6280980
• Journal Information: Physics of Fluids B; (USA), Vol. 2:10; ISSN 0899-8221
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
PLASMA
OSCILLATION MODES
ANALYTICAL SOLUTION
AZIMUTH
CORRELATIONS
ELECTRIC FIELDS
FREQUENCY DEPENDENCE
STANDING WAVES
640410* - Fluid Physics- General Fluid Dynamics