Complete stabilization of a tearing mode in steady state high-βp H-mode discharges by the first harmonic electron cyclotron heating/current drive on JT-60U
Complete stabilization of a tearing mode in steady state high-βp H-mode discharges by the first harmonic electron cyclotron heating/current drive on JT-60U
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DOI：
10.1088/0741-3335/42/12/102
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发表时间：
2000-12
影响因子：
2.2
通讯作者：
A. Isayama;Y. Kamada;S. Ide;K. Hamamatsu;T. Oikawa;T. Suzuki;Y. Neyatani;T. Ozeki;Y. Ikeda
中科院分区：
文献类型：
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作者：
A. Isayama;Y. Kamada;S. Ide;K. Hamamatsu;T. Oikawa;T. Suzuki;Y. Neyatani;T. Ozeki;Y. Ikeda
m = 3 和 n = 2 的撕裂模式在具有边缘局域模式 (ELM) 的稳态高 βp H 模式放电中不稳定，通过使用 110 GHz 第一谐波 O 模式电子回旋 (EC) 波的局部加热和电流驱动完全稳定。这里，m和n分别是极向和环形模数。通过从电子温度扰动分布和安全系数分布中识别模式位置来确定最佳 EC 波注入角。最佳喷射角度也是通过在放电期间扫描可操纵的镜子来确定的。在撕裂模式完全稳定的典型放电中，电子回旋加速器加热功率与总加热功率的比率为0.17，EC驱动电流与总等离子体电流的比率为0.02。有EC波注入的情况下的存储能量和中子发射率高于没有EC波注入的情况，这表明存储能量和中子发射率的减少通过撕裂模式稳定得以恢复。
A tearing mode with m = 3 and n = 2, destabilized in the steady state high-βp H-mode discharges with edge localized mode (ELM), was completely stabilized by local heating and current drive using the 110 GHz first harmonic O-mode electron cyclotron (EC) wave. Here, m and n are poloidal and toroidal mode numbers, respectively. The optimum EC wave injection angle was determined by identifying the mode location from an electron temperature perturbation profile and a safety factor profile. The optimum injection angle was also determined by scanning a steerable mirror during a discharge. In a typical discharge where the tearing mode is completely stabilized, the ratio of the electron cyclotron heating power to the total heating power is 0.17, and the ratio of the EC driven current to the total plasma current is 0.02. Stored energy and neutron emission rate were higher for the case with EC wave injection than that without EC wave injection, which suggests that the reduction of the stored energy and the neutron emission rate was recovered by the tearing mode stabilization.