CAJ | 학술논문

在高纬电离层，由于受大的对流电场的影响，致使离子的速度分布函数常常会表现为非麦克斯韦分布形式。通过简化玻耳兹曼弛豫碰撞模型下离子速度非麦克斯韦分布函数的积分解，得到了离子呈环形分布的速度分布函数，并模拟和图解分析了离子速度分布函数呈环形分布的特征。同时，基于离子温度各向异性，模拟并分析了当离子速度分布函数呈环形时，不同方向上的离子非相干散射功率谱。理论研究表明，在离子碰撞频率较低的高纬电离层，随着电离层对流电场的增强，离子速度分布函数呈环形分布的特征愈加明显，且考虑离子温度各向异性等因素对功率谱的影响，能更加符合高纬电离层实际。
재고위전리층，유우수대적대류전장적영향，치사리자적속도분포함수상상회표현위비맥극사위분포형식。통과간화파이자만이예팽당모형하리자속도비맥극사위분포함수적적분해，득도료리자정배형분포적속도분포함수，병모의화도해분석료리자속도분포함수정배형분포적특정。동시，기우리자온도각향이성，모의병분석료당리자속도분포함수정배형시，불동방향상적리자비상간산사공솔보。이론연구표명，재리자팽당빈솔교저적고위전리층，수착전리층대류전장적증강，리자속도분포함수정배형분포적특정유가명현，차고필리자온도각향이성등인소대공솔보적영향，능경가부합고위전리층실제。
Considering the relatively strong electric field and small collision frequency between ion and neutral in the high-latitude ionosphere ,the integral solution of the non-Maxwellian ion velocity distribu-tion function for the relaxation collision model is simplified ,the torus distribution function for ion veloc-ity is obtained ,and the characteristic of the torus distribution function is analyzed .Meanwhile ,using the electromagnetic theory of the incoherent scattering proposed by Sheffield ,and taking into account the ion temperature anisotropy and its variation with the electric field ,the incoherent scattering power spectrum of ion in different direction is simulated .The research shows that the ionospheric electric field , the ion-neutral collision frequency and the ion anisotropic temperature distribution is all have an effect on incoherent scatter spectra ,the research content provides a theoretical basis for further understanding the high-latitude ionosphere and improving detection accuracy of the radar .