托卡马克中考虑二阶回旋半径近似条件下的带电粒子轨道

来源 :第十五届全国等离子体科学技术会议 | 被引量 : 0次 | 上传用户:sunleilong
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  用哈密顿正则方法研究了带电粒子在托卡马克中的运动行为,首次用摄动方法给出了回旋半径在二阶近似条件下的带电粒子能量方程。通过联立求解Gra d-Shafranov方程的Solovev磁场位形与带电粒子的能量方程,解出了在任意拉长比和环径比的通行粒子与捕获粒子以及傍轴粒子的轨道。结果发现,相对于一阶近似方法,二阶近似条件下的带电粒子的轨道表现出飘移与箍缩。文中首次给出了托卡马克“损失锥”的求解结果,并发现,环向磁通对粒子的飘移和损失存在着较人影响,这一结果可能解释环向磁场对飘移不稳定性的作用机理。
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