Design of 5.0-GHz KSTAR lower-hybrid coupler

被引：15

作者：

Bae, YS ^{[1
]}

Paek, CH

Rhee, MJ

Namkung, W

Cho, MH

Bernabei, S

Park, H

机构：

[1] Pohang Univ Sci & Technol, Pohang 790784, South Korea

[2] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

来源：

FUSION ENGINEERING AND DESIGN | 2003年 / 65卷 / 04期

关键词：

KSTAR; LHCD; Tokamak; guidelet;

D O I：

10.1016/S0920-3796(02)00388-5

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：

The Korean Superconducting Tokamak Advanced Research (KSTAR) tokamak is being constructed to perform long-pulse, high-beta, advanced tokamak fusion physics experiments by Korean Basic Science Institute (KBSI). The KSTAR tokamak will use the non-inductive plasma current drive system, lower-hybrid current drive (LHCD) system for lone-pulse operation. A 5.0-GHz microwave coupler is designed for KSTAR LHCD experiments. Four high-power klystrons feed 128 guidelets at front coupler using hundred and twenty 3-dB power dividers including 3-dB power splitters in the coupler. The guidelet has a height of 5.5 cm and the width of 0.55 cm in order for the power flux density not to exceed 4.0 kW/cm(2) at the guidelet. The coupler is constructed by laminating a stack of metal plates milled to waveguide patterns. This paper describes detailed design for the 3-dB power splitter, the fixed-phase shifter, and the taper section composing the coupler. Using the High Frequency Structure Simulator (HFSS) program, we achieved a phase difference of +/-0.5degrees and a relative power difference less than 0.2% between two vertical guidelets. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：569 / 576

页数：8