Improvement of electron Bernstein wave heating in LHD

2014 Fiscal Year Final Research Report

• Project/Area Number: 24561029
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: YOSHIMURA Yasuo 核融合科学研究所, ヘリカル研究部, 准教授 (90300730)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 電子サイクロトロン波 / 電子バーンシュタイン波 / モード変換 / 高密度プラズマ / プラズマ加熱 / カットオフ / 定常プラズマ

Outline of Final Research Achievements

Heating plasmas with the electron density higher than the cut-off density of electron cyclotron (EC) heating waves was realized, by enabling the injection of EC-waves from high magnetic field side so that the EC waves are mode-converted to the electron Bernstein waves.
An interlock system which prevent the possible damage of LHD vacuum vessel caused by non-absorbed high power EC-waves was constructed. The interlock system greatly contributed to the progress of steady state plasma sustainment by EC-waves. In 2014, a high performance plasma with the line average electron density of 1.1×1019 m－3 and the central electron temperature of over 2.5keV was stably sustained by 350kW EC-wave for 39 min.

Free Research Field

プラズマ理工学