【摘要】 采用全波法和冷等离子体模型,探讨了极向磁场对电子回旋频段的寻常模到非寻常模转换过程的影响,研究结果表明,在N_y=0的情况下,天线发射的电子回旋波在等离子体中传播时,极向磁场的存在会导致消逝区一直存在,因此无法达到100%的模式转换。并且,随着等离子体中极向磁场强度的增大,转换效率将会迅速下降,最佳环向折射系数也将随之增大。更多还原

【Abstract】 After using the full-wave method and the cold plasma model,the influence of the poloidal magnetic field on the conversion process from ordinary mode to extraordinary-mode in the electron cyclotron range of frequencies has been discussed.The results show that in the case of N_y=0,when the electron cyclotron wave emitted by the antenna propagates in the plasma,the presence of the poloidal magnetic field will cause the region of evanescence to exist all the time,so the mode conversion of 100% can’t be achieved.Moreover,as the intensity of the poloidal magnetic field in the plasma increases,the conversion efficiency will decrease rapidly and the optimum toroidal refraction coefficient will also increase.更多还原