Parametric scattering in electron‐cyclotron resonance heating

Jukka Heikkinen, Seppo Karttunen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The problem of parametric scattering of the extraordinary and ordinary waves near electron‐cyclotron frequency off ion‐cyclotron waves is investigated. Convective thresholds for an inhomogeneous plasma are obtained analytically in the case when the scattered ordinary or extraordinary waves and the ion‐cyclotron wave are weakly damped. There are no restrictions on the angles the waves make with the ambient magnetic field. The dependence of the thresholds on the plasma density, electron and ion temperatures, and propagation angles is described. It is found that in present‐day electron‐cyclotron resonance heating experiments (I≲1 kW/cm2) the thresholds are evidently too high for parametric scattering, but in high‐intensity (I≳10 kW/cm2) experiments the possibility for scattering exists.
Original languageEnglish
Pages (from-to)1120-1126
Number of pages7
JournalThe Physics of Fluids
Volume29
Issue number4
DOIs
Publication statusPublished - 1985
MoE publication typeNot Eligible

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Scattering
Heating
Plasma density
Experiments
Magnetic fields
Plasmas
Electrons
Ions
Temperature

Cite this

Heikkinen, Jukka ; Karttunen, Seppo. / Parametric scattering in electron‐cyclotron resonance heating. In: The Physics of Fluids. 1985 ; Vol. 29, No. 4. pp. 1120-1126.
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Parametric scattering in electron‐cyclotron resonance heating. / Heikkinen, Jukka; Karttunen, Seppo.

In: The Physics of Fluids, Vol. 29, No. 4, 1985, p. 1120-1126.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Karttunen, Seppo

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AB - The problem of parametric scattering of the extraordinary and ordinary waves near electron‐cyclotron frequency off ion‐cyclotron waves is investigated. Convective thresholds for an inhomogeneous plasma are obtained analytically in the case when the scattered ordinary or extraordinary waves and the ion‐cyclotron wave are weakly damped. There are no restrictions on the angles the waves make with the ambient magnetic field. The dependence of the thresholds on the plasma density, electron and ion temperatures, and propagation angles is described. It is found that in present‐day electron‐cyclotron resonance heating experiments (I≲1 kW/cm2) the thresholds are evidently too high for parametric scattering, but in high‐intensity (I≳10 kW/cm2) experiments the possibility for scattering exists.

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