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 language | English |
|---|---|
| Pages (from-to) | 205 - 210 |
| Number of pages | 6 |
| Journal | Physics Letters A |
| Volume | 152 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - 1991 |
| MoE publication type | A1 Journal article-refereed |
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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 journal › Article › Scientific › peer-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 -