A mechanistic interpretation of the resonant wave-particle interaction

Journal Article · Thu May 05 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4948480· OSTI ID:1471065

Chim, Chi Yung ^[1]; O'Neil, Thomas M. ^[1]

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1. Univ. of California, San Diego, CA (United States)

This article provides a simple mechanistic interpretation of the resonant wave-particle interaction of Landau. For the simple case of a Langmuir wave in a Vlasov plasma, the non-resonant electrons satisfy an oscillator equation that is driven resonantly by the bare electric field from the resonant electrons, and in the case of wave damping, this complex driver field is of a phase to reduce the oscillation amplitude. The wave-particle resonant interaction also occurs in waves governed by 2D ExB drift dynamics, such as a diocotron wave. In this case, the bare electric field from the resonant electrons causes ExB drift motion back in the core plasma, reducing the amplitude of the wave.

• Research Organization: Univ. of California, San Diego, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC); National Science Foundation (NSF)
• Grant/Contract Number: SC0002451; PHY-1414570
• OSTI ID: 1471065
• Alternate ID(s): OSTI ID: 1251479
• Journal Information: Physics of Plasmas, Vol. 23, Issue 5; ISSN 1070-664X
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY