Non-Inductive Start up of QUEST Plasma by RF Powert

作     者：K. HANADA H. ZUSHI H. IDEI K. NAKAMURA M. ISHIGURO S. TASHIMA E. I. KALINNIKOVA M. SAKAMOTO M. HASEGAWA A. FUJISAWA A. HIGASHIJIMA S. KAWASAKI H. NAKASHIMA H. LIU O. MITARAI T. MAEKAWA A. FUKUYAM Y. TAKASE J. QIAN 

作者机构：Research Institute for Applied Mechanics Kyushu University Japan Interdisciplinary Graduate School of Engineering Science Kyushu University Japan School of Industrial Engineering Tokai University Japan Graduate School of Energy Science Kyoto University Japan Graduate School of Technology Kyoto University Japan Graduate School of Frontier Science University of Tokyo Japan Institute of Plasma Physics Chinese Academy of Sciences China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2011年第13卷第3期

页      面：307-311页

核心收录：

学科分类：08[工学] 082304[工学-载运工具运用工程] 080204[工学-车辆工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 0802[工学-机械工程] 0702[理学-物理学] 0823[工学-交通运输工程] 

基　　金：Grant-in-aid for Scientific Research from Ministry of Education,Culture,Sports,Science and Technology of Japan JSPS-CAS Core-University program in the field of 'Plasma and Nuclear Fusion' Collaborative Research Program of Research Institute for Applied Mechanics,Kyushu University NIFS Collaboration Research Pro-gram 

主　　题：steady-state operation of spherical tokamak non-inductive current drive QUEST 

摘      要：Both start-up and sustainment of plasma were successfully achieved by fully non- inductive current drive using microwave with a frequency of 8.2 GHz. Plasmas current of 15 kA was implemented for 1 s. Magnetic surface reconstruction exhibited a plasma shape with an aspect ratio of below 1.5. The plasma current was dependent significantly on the launched microwave power and vertical magnetic field, while not affected by the mode of launched wave and the toroidal refractive index. Hard X-ray （HXR） emitted from energetic electrons accelerated by the microwave was observed, and the discharge with a plasma current over 4 kA followed the same trend as the number of photons of 10 keV to 12 keV. This suggests that the plasma current may be driven by energetic electrons. Based on the experimental conditions, alternative explanations of how the plasma current could be driven are discussed.