Direct losses of highly energetic trapped particles in torsatrons and heliotrons with a vertically asymmetric helical magnetic-field ripple
Direct losses of highly energetic trapped particles in torsatrons and heliotrons with a vertically asymmetric helical magnetic-field ripple
复制标题
具有垂直不对称螺旋磁场波纹的托萨管和日光管中高能捕获粒子的直接损失
DOI：
10.1063/1.873329
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发表时间：
1999
影响因子：
2.2
通讯作者：
M. Smirnova
中科院分区：
文献类型：
--
作者：
M. Smirnova
在扭转加速器和日光加速器中，分析研究了高能螺旋捕获粒子，特别是超级香蕉的直接损失[Uo，J. Phys. Soc. Jpn. 16，1380（1961）]，具有垂直不对称的螺旋场涟漪。据发现，垂直不对称的螺旋涟漪造成额外的净径向漂移的超高温superbanana，导致这些粒子的对流损失，主要是在垂直方向上的约束体积。对于一个垂直非对称波纹扭转电子管，粒子损失区域在坐标空间中的位置和粒子从约束体积逃逸的主导方向的预测的基础上的粒子捕获/从螺旋涟漪阱/脱陷的概率。分析预测证实了高能量的螺旋捕获粒子的直接损失的数值计算的一些torsatrons/helitrons的今天。
Direct losses of highly energetic helically trapped particles, especially of superbananas, are analytically investigated in torsatrons and heliotrons [Uo, J. Phys. Soc. Jpn. 16, 1380 (1961)] with a vertically asymmetric helical field ripple. It is found that the vertically asymmetric helical ripple causes an additional net radial drift of suprathermal superbananas, leading to convective losses of these particles from the confinement volume mainly in the vertical direction. For a vertically asymmetric rippled torsatron, a location of the particle loss region in the coordinate space and a dominated direction of the particle escape from the confinement volume is predicted on the basis of the probabilities of the particle trapping/detrapping in/from the helical ripple wells. Analytical predictions are confirmed by numerical computations of direct losses of highly energetic helically trapped particles for a number of torsatrons/heliotrons of today.