Enhanced conversion of thermal electron Bernstein waves to the extraordinary electromagnetic mode on the National Spherical Torus Experiment
Enhanced conversion of thermal electron Bernstein waves to the extraordinary electromagnetic mode on the National Spherical Torus Experiment
复制标题
国家球面环面实验中热电子伯恩斯坦波向异常电磁模式的增强转换
DOI：
10.1063/1.1564081
复制
发表时间：
2003
影响因子：
2.2
通讯作者：
S. Sabbagh
中科院分区：
文献类型：
--
作者：
G. Taylor;P. Efthimion;B. Jones;B. LeBlanc;James R. Wilson;J. Wilgen;G. Bell;T. Bigelow;R. Maingi;D. Rasmussen;R. Harvey;A. Smirnov;F. Paoletti;S. Sabbagh
在欧姆加热的国家球面环面实验等离子体的刮出中，当密度标尺长度(Ln)被局部氮化硼限制器逐渐缩短时，热电子Bernstein波(EBW)到非常模式(X模式)的转换增加了四倍[M.Ono，S.Kaye，M.Peng等，第17届国际原子能机构聚变能量会议(IAEA，维也纳，1999)，第3卷，第1135页]。当Ln减小到0.7 cm时，最大转换效率接近50%，这与使用现场测量的Ln的理论预测一致。计算表明，可以建立带有局部限制器的Ln<；0.3 cm，该值预计将实现∼100%电子束焊接到X模式的转换，以支持所提出的电子束焊接加热和电流驱动方案。
A fourfold increase in the conversion of thermal electron Bernstein waves (EBW) to the extraordinary mode (X mode) was measured when the density scale length (Ln) was progressively shortened by a local boron nitride limiter in the scrape-off of an Ohmically heated National Spherical Torus Experiment plasma [M. Ono, S. Kaye, M. Peng et al., Proceedings of the 17th IAEA Fusion Energy Conference (IAEA, Vienna, 1999), Vol. 3, p. 1135]. The maximum conversion efficiency approached 50% when Ln was reduced to 0.7 cm, in agreement with theoretical predictions that used locally measured Ln. Calculations indicate that it is possible to establish Ln<0.3 cm with a local limiter, a value predicted to attain ∼100% EBW conversion to the X mode in support of proposed EBW heating and current drive scenarios.