Parametric excitation of ion quasi-mode by the pump near the ion cyclotron frequency

M. Ono; M. Porkolab; R. P H Chang

doi:10.1063/1.863186

Parametric excitation of ion quasi-mode by the pump near the ion cyclotron frequency

M. Ono^*, M. Porkolab, R. P H Chang

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

Parametric excitation of a nonresonant ion quasi-mode in a low density (i.e., ω_pi ≈Ω_i) plasma is observed when the pump frequency is ω₀≳2Ω_i. From the interferometry measurement, the lower sideband is identified to be the cold lower hybrid wave and the low-frequency mode is shown to be a nonresonant ion quasi-mode. The dependence of the excitation process and the threshold upon density has been measured and was found to agree well with theory. The ion heating associated with this decay process is also observed. Such processes may take place near the plasma surface during ion cyclotron range of frequency heating experiments in tokamaks.

Original language	English (US)
Pages (from-to)	1675-1681
Number of pages	7
Journal	Physics of Fluids
Volume	23
Issue number	8
DOIs	https://doi.org/10.1063/1.863186
State	Published - 1980

ASJC Scopus subject areas

Computational Mechanics
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1063/1.863186

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title = "Parametric excitation of ion quasi-mode by the pump near the ion cyclotron frequency",

abstract = "Parametric excitation of a nonresonant ion quasi-mode in a low density (i.e., ωpi ≈Ωi) plasma is observed when the pump frequency is ω0≳2Ωi. From the interferometry measurement, the lower sideband is identified to be the cold lower hybrid wave and the low-frequency mode is shown to be a nonresonant ion quasi-mode. The dependence of the excitation process and the threshold upon density has been measured and was found to agree well with theory. The ion heating associated with this decay process is also observed. Such processes may take place near the plasma surface during ion cyclotron range of frequency heating experiments in tokamaks.",

author = "M. Ono and M. Porkolab and Chang, {R. P H}",

year = "1980",

doi = "10.1063/1.863186",

language = "English (US)",

volume = "23",

pages = "1675--1681",

journal = "Physics of Fluids",

issn = "1070-6631",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - Parametric excitation of ion quasi-mode by the pump near the ion cyclotron frequency

AU - Ono, M.

AU - Porkolab, M.

AU - Chang, R. P H

PY - 1980

Y1 - 1980

N2 - Parametric excitation of a nonresonant ion quasi-mode in a low density (i.e., ωpi ≈Ωi) plasma is observed when the pump frequency is ω0≳2Ωi. From the interferometry measurement, the lower sideband is identified to be the cold lower hybrid wave and the low-frequency mode is shown to be a nonresonant ion quasi-mode. The dependence of the excitation process and the threshold upon density has been measured and was found to agree well with theory. The ion heating associated with this decay process is also observed. Such processes may take place near the plasma surface during ion cyclotron range of frequency heating experiments in tokamaks.

AB - Parametric excitation of a nonresonant ion quasi-mode in a low density (i.e., ωpi ≈Ωi) plasma is observed when the pump frequency is ω0≳2Ωi. From the interferometry measurement, the lower sideband is identified to be the cold lower hybrid wave and the low-frequency mode is shown to be a nonresonant ion quasi-mode. The dependence of the excitation process and the threshold upon density has been measured and was found to agree well with theory. The ion heating associated with this decay process is also observed. Such processes may take place near the plasma surface during ion cyclotron range of frequency heating experiments in tokamaks.

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M3 - Article

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JO - Physics of Fluids

JF - Physics of Fluids

IS - 8

ER -

Parametric excitation of ion quasi-mode by the pump near the ion cyclotron frequency

Abstract

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