Study of magnetic toroidal-ripple-component effect on the fast ion confinement

研究了具有大垂直速度的快离子的产生和限制。这种粒子的限制是螺旋器件的一个关键问题。为了产生快离子(质子)，使用了离子回旋频率范围(ICRF)加热。在可灵活控制颠簸的Heliotron-J磁场中考察了环形波纹分量(颠簸)的影响，在颠簸程度较高的情况下，用电荷交换粒子分析仪测量了大于30keV的快离子，并对视线进行了二维扫描，研究了快离子在环面中的分布。与其他凹凸度的计算结果相比，高凹凸度具有更好的约束性能。用蒙特卡罗方法编制的数值程序可以部分地再现快离子在高颠簸中良好的产生和禁闭特性。

The production and confinement of fast ions which have large perpendicular velocity have been studied. The confinement of such particles is a key issue of the helical devices. For the production of fast ions (protons), ion cyclotron range of frequencies (ICRF) heating is used. The effect of the toroidal ripple component (bumpiness) is examined in the Heliotron-J magnetic field, which has flexibility to control bumpiness.In the high bumpiness configuration, the fast ions more than 30 keV were measured by the charge-exchange particle analyzer and two dimensional scan of the line-of-sight was done to investigate distribution of fast ions in the torus. Comparing with the results of the other bumpunesses, the better confinement property was confirmed in the high bumpiness. The numerical code using Monte-Carlo method can be developed and partially reproduced the good production and confinement property of fast ions in the high bumpiness.