Development of electromagnetic propagation simulation for millmeter-wave guide elements

2014 Fiscal Year Final Research Report

• Project/Area Number: 24656560
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: NAKAMURA Hiroaki 核融合科学研究所, ヘリカル研究部, 教授 (30311210)
• Co-Investigator(Kenkyū-buntansha): TAMURA Yuichi 甲南大学, 知能情報学部, 教授 (50311212) ; KUBO Shin 核融合科学研究所, ヘリカル研究部, 教授 (80170025)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 導波管 / 時間領域空間差分法 / FDTD法 / 電子サイクロトロン加熱 / ミリ波 / マイターベンド / 核融合

Outline of Final Research Achievements

To improve millimeter-wave transmission efficiency of the electron cyclotron heating (ECH) system in the nuclear fusion plasma, we developed electromagnetic wave propagation simulation (time domain space difference method: FDTD).
As research results, we developed a FDTD simulation code in visualization system for miter bend. This code is useful not only for miter bend but also to analyze the electromagnetic waves of the waveguide. Using this code, it was found that corrugated waveguide suppresses eddy currents. The results were compared with experiment of the heat distribution in the mirror of the miter bend. From this comarison, it was almost the same. Furthermore, it is improved to allow the calculation of the induced current. Then it was possible to simulate the electromagnetic wave propagation in a mitered bend and a mitered bend polarizer.

Free Research Field

計算科学