Experimental Study of Turbulence and Zonal Flow in Edge Plasmas of the HL-2A Tokamak
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概要
- 論文の詳細を見る
Measurements with a three dimensional set of Langmuir probe arrays have unambiguously demonstrated the coexistence of intensive low frequency zonal flows (LFZFs), geodesic acoustic modes (GAMs), low frequency fluctuations (LFFs) and high frequency ambient turbulence (HFAT) in the edge of HL-2A tokamak plasmas, by verifying the temporal and spatial characteristics of the electrostatic fluctuations. The intensity of the LFZFs is observed to increase and decrease with increases of ECRH power (∼ 300-700 kW) and safety factor q (∼ 3.5-6.2), respectively, and the intensity of the GAMs increases with the ECRH power as well as q. The radial wave number-frequency spectra of the LFZF show that the LFZF packets propagate outwards and inwards as equally likely events, while the GAM packets propagate predominantly outwards. The three wave coupling of the zonal flows, including the GAMs, and the LFFs with the HFAT is investigated in detail.
著者
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Fujisawa Akihide
National Institute For Fusion Science
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Ding Xuantong
Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
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Liu Yi
Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
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Song Xianming
Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
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Duan Xuru
Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, China
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YANG Qingwei
Southwestern Institute of Physics, P. O. Box 432, Chengdu, China
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QIAN Jun
Southwestern Institute of Physics, P. O. Box 432, Chengdu, China
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DONG Jiaqi
Southwestern Institute of Physics, P. O. Box 432, Chengdu, China
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ZHAO Kaijun
Southwestern Institute of Physics, P. O. Box 432, Chengdu, China
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YAN Longwen
Southwestern Institute of Physics, P. O. Box 432, Chengdu, China
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HONG Wenyu
Southwestern Institute of Physics, P. O. Box 432, Chengdu, China
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YU Changxuan
Department of Modern Physics, University of Science and Technology of China, Hefei, China
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CHENG Jun
Southwestern Institute of Physics, P. O. Box 432, Chengdu, China
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LIU Adi
Department of Modern Physics, University of Science and Technology of China, Hefei, China
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LAN Tao
Department of Modern Physics, University of Science and Technology of China, Hefei, China
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ZHAO Hailin
Department of Modern Physics, University of Science and Technology of China, Hefei, China
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KONG Defeng
Department of Modern Physics, University of Science and Technology of China, Hefei, China
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HUANG Yuan
Southwestern Institute of Physics, P. O. Box 432, Chengdu, China
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LI Qiang
Southwestern Institute of Physics, P. O. Box 432, Chengdu, China
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LIU Yong
Southwestern Institute of Physics, P. O. Box 432, Chengdu, China
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LIU Yi
Southwest Institute of Physics
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DING Xuantong
Southwestern Institute of Physics, P. O. Box 432, Chengdu, China
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SONG Xianming
Southwestern Institute of Physics, P. O. Box 432, Chengdu, China
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