托卡马克中极向静电天线的离子Bernstein波的耦合计算

本文采用均匀的等离子体模型,对在托卡马克低场边由极向静电天线激发离子Bernstein波(IBW)的耦合问题作详细的理论分析。为了能更符合实验中的实际情况,文中考虑天线为有限长度以及非零的极向波数(k_y≠0)对耦合特性计算的影响。计算表明,极向静电天线可以有效地在等离子体中激发IBW。比较该天线与传统的环向IBW天线的辐射功率谱和阻抗等计算结果,表明两种天线对IBW的耦合有相似的特性。 关键词：

ION BERNSTEIN WAVE COUPLING FOR POLOIDAL ELECTROSTATIC ANTENNA IN TOKAMAK

The coupling of Ion Bernstein Wave (IBW) excited at low-field side bv poloidal electrostatic antenna to plasma using uniform plasma model has been theoretically stydied. In order to more tally with the actual situation, the finiteness of antenna poloidal length and the nonzero poloidal wave number are considered. The computation of the coupling cord shows that the poloidal electrostatic antenna is able fo excited mostly IBW in plasma. The comparison between the poloidal electrostatic antenna and the conventional toroidal antenna for instrinsic spectral impedance, input impedance and wave energy fluxes is also made, from which it is concluded that the character of coupling IBW for both antenna is quite similar.