Electrostatic wave generation by the faraday shield in ICRF heating

Jukka Heikkinen

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

The generation of fringing fields by the Faraday shield of a fast wave antenna and the concomitant coupling of the wave power to electrostatic waves is analysed for the case of weakly misaligned screen blades. The coupled electrostatic wave power is found to be proportional to sin2 β, where β ⪡ 1 is the misalignment angle. Under optimum conditions when the angular frequency is just below the first harmonic of the cyclotron frequency of any ion species and the plasma density near the shield is high, 10–20% of the loading of the antenna may result from ion Bernstein wave excitation with β = 0.1.

Original languageEnglish
Pages (from-to)205 - 210
Number of pages6
JournalPhysics Letters A
Volume152
Issue number3-4
DOIs
Publication statusPublished - 1991
MoE publication typeA1 Journal article-refereed

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electrostatic waves
wave generation
antennas
heating
cyclotron frequency
wave excitation
blades
misalignment
plasma density
ions
harmonics

Cite this

Heikkinen, Jukka. / Electrostatic wave generation by the faraday shield in ICRF heating. In: Physics Letters A. 1991 ; Vol. 152, No. 3-4. pp. 205 - 210.
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title = "Electrostatic wave generation by the faraday shield in ICRF heating",
abstract = "The generation of fringing fields by the Faraday shield of a fast wave antenna and the concomitant coupling of the wave power to electrostatic waves is analysed for the case of weakly misaligned screen blades. The coupled electrostatic wave power is found to be proportional to sin2 β, where β ⪡ 1 is the misalignment angle. Under optimum conditions when the angular frequency is just below the first harmonic of the cyclotron frequency of any ion species and the plasma density near the shield is high, 10–20{\%} of the loading of the antenna may result from ion Bernstein wave excitation with β = 0.1.",
author = "Jukka Heikkinen",
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Electrostatic wave generation by the faraday shield in ICRF heating. / Heikkinen, Jukka.

In: Physics Letters A, Vol. 152, No. 3-4, 1991, p. 205 - 210.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Electrostatic wave generation by the faraday shield in ICRF heating

AU - Heikkinen, Jukka

N1 - Project code: YDI9006

PY - 1991

Y1 - 1991

N2 - The generation of fringing fields by the Faraday shield of a fast wave antenna and the concomitant coupling of the wave power to electrostatic waves is analysed for the case of weakly misaligned screen blades. The coupled electrostatic wave power is found to be proportional to sin2 β, where β ⪡ 1 is the misalignment angle. Under optimum conditions when the angular frequency is just below the first harmonic of the cyclotron frequency of any ion species and the plasma density near the shield is high, 10–20% of the loading of the antenna may result from ion Bernstein wave excitation with β = 0.1.

AB - The generation of fringing fields by the Faraday shield of a fast wave antenna and the concomitant coupling of the wave power to electrostatic waves is analysed for the case of weakly misaligned screen blades. The coupled electrostatic wave power is found to be proportional to sin2 β, where β ⪡ 1 is the misalignment angle. Under optimum conditions when the angular frequency is just below the first harmonic of the cyclotron frequency of any ion species and the plasma density near the shield is high, 10–20% of the loading of the antenna may result from ion Bernstein wave excitation with β = 0.1.

U2 - 10.1016/0375-9601(91)91093-S

DO - 10.1016/0375-9601(91)91093-S

M3 - Article

VL - 152

SP - 205

EP - 210

JO - Physics Letters A

JF - Physics Letters A

SN - 0375-9601

IS - 3-4

ER -