Optimization of incident wave polarization for ECRH in LHD

被引：15

作者：

Notake, T ^{[1
]}

Kubo, S

Shimozuma, T

Idei, H

Yoshimura, Y

Inagaki, S

Ohkubo, K

Kobayashi, S

Mizuno, Y

Ito, S

Takita, Y

Watari, T

Narihara, K

Morisaki, T

Yamada, I

Nagayama, Y

Tanaka, K

Sakakibara, S

Kumazawa, R

Seki, T

Saito, K

Mutoh, T

Shimizu, A

Komori, A

机构：

[1] Nagoya Univ, Fac Energy Engn & Sci, Nagoya, Aichi 4648603, Japan

[2] Natl Inst Fus Sci, Gifu 5095292, Japan

[3] Kyushu Univ, Appl Mech Res Inst, Kasuga, Fukuoka 8168580, Japan

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2005年 / 47卷 / 03期

关键词：

D O I：

10.1088/0741-3335/47/3/009

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

This paper reports on the results of an experimental investigation into electron cyclotron resonance heating (ECRH) using the fundamental O-mode in the large helical device (LHD). The aim of the experiment is to understand the mechanism of the selective excitation of the O-mode EC wave and, thereby, optimize the performance of the ECRH. The polarization angle and the ellipticity of the electric field of the incident high power millimetre waves were varied in the experiment using a pair of grating polarizers. The responses of the plasma stored energy and electron temperature were measured to evaluate the effects. The optimum values of the polarization angle and the ellipticity for the ECRH were identified experimentally. A simple model of power branching between the O- and X-modes is introduced in order to interpret the observed experimental results. Specific to the ECRH in the LHD configuration, the effect of magnetic shear in the plasma peripheral region is considered.

引用

页码：531 / 544

页数：14

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