SIMPLE MULTIJUNCTION LAUNCHER WITH OVERSIZED WAVE-GUIDES FOR LOWER-HYBRID CURRENT DRIVE ON JT-60U

被引：23

作者：

IKEDA, Y

NAITO, O

SEKI, M

KONDOH, T

IDE, S

ANNO, K

FUKUDA, H

IKEDA, Y

KITAI, T

KIYONO, K

SAWAHATA, M

SHINOZAKI, S

SUGANUMA, K

SUZUKI, N

USHIGUSA, K

机构：

[1] Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-gun, Ibaraki-ken, 311-01, Naka-machi

来源：

FUSION ENGINEERING AND DESIGN | 1994年 / 24卷 / 03期

关键词：

D O I：

10.1016/0920-3796(94)90027-2

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

A multijunction technique with oversized waveguides has been developed for the lower hybrid current drive launcher on JT-60U. The launcher consists of 4 (toroidal) x 4 (poloidal) multijunction modules. RF power in the module is divided toroidally into 12 sub-waveguides at a junction point through an oversized waveguide. This method simplifies the structure of the multijunction launcher with a large number of subwaveguides. A maximum power density up to 25 MW m-2 has been achieved with a low reflection coefficient of less than 2%. The coupling and current drive efficiency are well explained by the designed wave spectra without taking account of higher modes in the oversize waveguides. Thus, the simple multijunction launcher has been demonstrated to excite expected wave spectra with high power handling capability.

引用

页码：287 / 298

页数：12

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