ECH system and its application to long pulse discharge in large helical device
ECH system and its application to long pulse discharge in large helical device
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ECH系统及其在大型螺旋装置长脉冲放电中的应用
DOI：
10.1016/s0920-3796(00)00529-9
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发表时间：
2001
影响因子：
1.7
通讯作者：
O. Motojima
中科院分区：
文献类型：
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作者：
T. Shimozuma;S. Kubo;M. Sato;H. Idei;Y. Takita;S. Ito;S. Kobayashi;Y. Mizuno;Y. Yoshimura;K. Ohkubo;H. Funaba;S. Inagaki;T. Kobuchi;S. Masuzaki;S. Muto;M. Shoji;H. Suzuki;N. Noda;Y. Nakamura;K. Kawahata;N. Ohyabu;O. Motojima
研制并构建了大型螺旋装置（LHD）的ECH系统。ECH系统由0.5 MW、84 GHz和168 GHz回旋管、高压电源、长距离传输线和船载准光学天线组成。它已逐步得到改进。在LHD第三次实验中，运行了3个84 GHz范围（2个82.6 GHz和1个84 GHz）和3个168 GHz回旋管，可以从4个垂直天线和2个水平天线注入ECH功率。这个复杂的系统通过TCP（传输控制协议）通信在PC上实现全GUI（图形用户界面）控制面板的远程控制和监控。在这个系统的实验活动中，超过10,000次的回旋加速器功率被稳定地注入到LHD中。系统中有一条线路（84 GHz）是专门为稳态等离子体生产实验准备的。使用这条线，仅用ECH电源就能成功地维持2分钟的等离子体。注入ECH功率为50 kW，占空比为95%。持续等离子体的电子密度和温度分别为0.3-0.5×1018m−3和~ 650 eV。在射频注入过程中，杂质辐射谱线的多普勒展宽测量到的离子温度保持在~ 300 eV恒定。
We have developed and constructed an ECH system for the large helical device (LHD). The ECH system consists of 0.5 MW, 84 GHz range and 168 GHz gyrotrons, high voltage power supplies, long distance transmission lines, and in-vessel quasi-optical antennas. It has been improved step by step. At the third campaign of LHD experiments, three 84 GHz range (two 82.6 GHz and one 84 GHz) and three 168 GHz gyrotrons are operated and ECH power can be injected from four antennas vertically and two horizontally. This complicated system is remotely controlled and monitored by fully GUI (Graphical User Interface) control panels realized on PC via TCP (transmission control protocol) communication. Over 10 000 shots of gyrotron power have been injected steadily into the LHD during the experimental campaigns on this system. One line of the system (84 GHz line) is specially prepared for the experiments of steady state plasma production. Using this line, plasma sustainment for 2 min was successfully achieved by only ECH power. Injected ECH power was 50 kW with 95% duty factor. The electron density and temperature of the sustained plasma are measured to be 0.3–0.5×1018m−3and ∼650 eV. Ion temperature measured by Doppler broadening of the impurity radiation line was kept constant at ∼300 eV during RF injection.
S. Sudo、Y. Nagayama、M. Emoto、M. Goto、Y. Hamada、K. Ida、T. Ido、H. Iguchi、S. Inagaki、M. Isobe、K. Kawahata、K. KMopenkov、S.
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