The helicon antenna is a well-known device in the field of electric propulsion. Here we investigate the vector potential produced in vacuum by such an antenna with typical size parameters. Both a static and a dynamic analysis are performed. The dynamic calculation is evaluated at both the usual operating frequency and one which is slightly greater. At the higher frequency, a pulse of electromagnetic energy is found to propagate along the cylindrical axis in either direction. The possible adaptation of the helicon antenna as a RF injection device for burning plasma is discussed.
Three Dimensional Multiphysics Modelling of Helicon Wave Heating and Antenna Plasma Coupling for Boundary Density Control in Toroidal Fusion Plasmas
Institute of Plasma Physics, HFIPS, Chinese Academy of Sciences(中国科学院合肥物质科学研究院等离子体物理研究所);Science Island Branch of Graduate, University of Science and Technology of China(中国科学技术大学研究生院科学岛分院);Fundamental Plasma Physics and Innovative Applications Laboratory, School of Electrical Engineering, Chongqing University(重庆大学电气工程学院基础等离子体物理与创新应用实验室);Mathematical Sciences Institute, Australian National University(澳大利亚国立大学数学科学学院);Department of Mathematics and Physics, University of South China(南华大学数学与物理学院);School of Physical and Mathematical Sciences, Nanyang Technological University(南洋理工大学物理与数学学院);College of Physics and Optoelectronic Engineering, Shenzhen University(深圳大学物理与光电工程学院)
Resonant Pitch-Angle Scattering Of Runaway-Electrons by Externally-launched Helicon Waves in the DIII-D Tokamak
Columbia University(哥伦比亚大学);EPFL, Swiss Plasma Center (SPC)(瑞士联邦理工学院洛桑分校,瑞士等离子体中心);General Atomics(通用原子能公司);University of California San Diego(加利福尼亚大学圣地亚哥分校);University of California, Irvine(加利福尼亚大学尔湾分校);Oak Ridge National Laboratory(橡树岭国家实验室);Los Alamos National Laboratory(洛斯阿拉莫斯国家实验室)
Wave modelling in a cylindrical non-uniform helicon discharge
采用基于麦克斯韦方程组和冷等离子体介电张量的射频场求解器描述了圆柱形非均匀螺旋放电中观察到的波动现象。实验是在最近建成的线性等离子体-物质相互作用装置--磁化等离子体相互作用实验装置(MAGPIE)上进行的。D.布莱克威尔,J.F.卡内塞斯角Samuell,J. Wach,J. Howard,and C. S. Corr,2012年3月25日提交给Plasma Sources Science and Technology],其中等离子体密度和静态磁场都是轴向位置的函数。从源到靶板的场强增加了15倍,等离子体密度和电子温度径向不均匀。与增强因子为9.5的电子-离子库仑碰撞频率,12%的天线半径减少,和相同的其他条件中所采用的实验中,求解器产生的轴向和径向轮廓的波的振幅和相位是一致的测量。离子声湍流,这可能会发生,如果电子漂移速度超过声速在磁化等离子体中,可能占9.5的因素,用于匹配模拟结果与实验数据。为了克服RF解算器的单m真空解的限制,其只能计算玻璃对天线的相同模式数的响应,我们调整了天线半径以匹配等离子体中的波场强度。(not由于字数有限,请看全文)