Electron Cyclotron Emission Image Diagnostics based on Adaptive-array Analysis

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14529
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nuclear fusion studies
• Research Institution: Kyushu University
• Principal Investigator: Idei Hiroshi 九州大学, 応用力学研究所, 教授 (70260049)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 電子サイクロトロン輻射 / アダプティブアレイ解析 / 位相配列アンテナ

Outline of Final Research Achievements

It is confirmed that propagating phases of non-coherent waves are properly analyzed in image diagnostics with adaptive-array technique. First the wave propagation was detected in snap-shot measurements, and then was done using a software-defined radio system with date streaming in high time resolution. The receiving lobe of the non-coherent wave could be analyzed with similar spatial resolution of the coherent-wave radiation lobe. Here a broadband thermal noise source was used as a non-coherent emission source. A Capon method remarkably reduces the receiving lobe area, compared to that with the normal beam-forming method. A looped antenna has been considered as a phased-array receiver to find the emitting position precisely. A number of the looped antennae could be prepared in the limited space, taking advantages for the precise position finding.

Free Research Field

プラズマ理工学、核融合学