Initial results from the TST-2 spherical tokamak
Initial results from the TST-2 spherical tokamak
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DOI：
10.1088/0029-5515/41/11/303
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发表时间：
2001-11
期刊：
影响因子：
3.3
通讯作者：
Y. Takase;A. Ejiri;N. Kasuya;T. Mashiko;S. Shiraiwa;L. Tozawa;T. Akiduki;H. Kasahara;Y. Nagashima
中科院分区：
文献类型：
--
作者：
Y. Takase;A. Ejiri;N. Kasuya;T. Mashiko;S. Shiraiwa;L. Tozawa;T. Akiduki;H. Kasahara;Y. Nagashima
东京大学建造了一个新的球形托卡马克TST-2，并于1999年9月开始运行。在2.45 GHz下，通常使用1 kW的ECH功率实现可靠的等离子体引发。等离子体电流高达90 kA和高达0.2 T的环形场已实现在最初的实验活动。离子温度通常为100 eV。经常观察到内部重新连接事件。在r/a = 2/3时测得的内部磁场表明波动增长到四次谐波，表明存在具有几个不同模式数的模式。在存在的环向场和具有正曲率的垂直场的情况下，用1 kW的ECH功率观察到1 kA量级的非感应驱动电流。驱动电流随充注压力的降低而增大，最低可达4 × 10-4Pa。高次谐波快波激发和传播的研究已经开始。初步结果表明，高效的波浪发射。射频磁场的空间分布与全波计算的结果定性一致。
A new spherical tokamak, TST-2, was constructed at the University of Tokyo and started operation in September 1999. Reliable plasma initiation is achieved with typically 1 kW of ECH power at 2.45 GHz. Plasma currents of up to 90 kA and toroidal fields of up to 0.2 T have been achieved during the initial experimental campaign. The ion temperature is typically 100 eV. Internal reconnection events are often observed. The internal magnetic field measured at r/a = 2/3 indicated growth of fluctuations up to the fourth harmonic, suggesting the existence of modes with several different mode numbers. In the presence of a toroidal field and a vertical field with positive curvature, non-inductively driven currents of the order of 1 kA were observed with 1 kW of ECH power. The driven current increased with decreasing filling pressure, down to 4 × 10-4Pa. A study of high harmonic fast wave excitation and propagation has begun. Initial results indicate highly efficient wave launching. The spatial distribution of the RF magnetic field was qualitatively consistent with the result of a full-wave calculation.