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XIA Donghui(夏冬辉), ZHOU Jun(周俊), RAO Jun(饶军), HUANG Mei(黄梅), LU Zhihong(陆志鸿), WANG He(王贺), CHEN Gangyu(陈罡宇), WANG Chao(王超), LU Bo(卢波), ZHUANG Ge(庄革). Design of the Transmission Lines for 140 GHz ECRH System on HL-2A[J]. Plasma Science and Technology, 2014, 16(3): 267-272. DOI: 10.1088/1009-0630/16/3/17
Citation: XIA Donghui(夏冬辉), ZHOU Jun(周俊), RAO Jun(饶军), HUANG Mei(黄梅), LU Zhihong(陆志鸿), WANG He(王贺), CHEN Gangyu(陈罡宇), WANG Chao(王超), LU Bo(卢波), ZHUANG Ge(庄革). Design of the Transmission Lines for 140 GHz ECRH System on HL-2A[J]. Plasma Science and Technology, 2014, 16(3): 267-272. DOI: 10.1088/1009-0630/16/3/17
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    Abstract
  • A new 140 GHz/2 MW/3 s electron cyclotron resonance heating (ECRH) system composed of two units is now being constructed on HL-2A. As a part of the system, two trans- mission lines marked No.7 & 8 play the role of carrying microwave power from two gyrotrons to the tokamak port. Based on the oversized circular corrugated waveguide technology, an evacu- ated transmission system with high power capability and high transmission efficiency is designed. Details are presented for the design of the corrugated waveguide, the layout of the proposed lines and the vacuum pumping system. Then mode conversion losses due to coupling, misalignment, bends and gaps are discussed to serve as a reference for analyzing the transmission efficiency and alignment. Finally, a dual-modes propagation case consisting of the HE 11 and LP 11 even modes is discussed.
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