Space and velocity distributions of fast ions in magnetically confined plasmas
Space and velocity distributions of fast ions in magnetically confined plasmas
复制标题
磁约束等离子体中快离子的空间和速度分布
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
F. Wising
中科院分区：
文献类型：
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作者：
Y. Kolesnichenko;M. Lisak;V. Lutsenko;F. Wising
的轨道平均分布函数的一般表达式获得的局部特征量的快离子，如速度分布，粒子和能量密度，和功率沉积。所得到的表达式适用于一个非常峰值的快速离子的生产配置文件的情况下，其特征在于特别强的轨道效应。它示出，在这种情况下，快速离子的径向分布可以是显着不同的源配置文件，是，例如，强烈的非单调性。分析进行了一个直以及托卡马克磁场。据预测，由于电子阻力，边缘共同通过和半捕获粒子（即仅在一个方位角方向上捕获的粒子）可以转化为捕获和循环粒子。得到了碰撞运动常数。
General expressions in terms of the orbit-averaged distribution function are obtained for local characteristic quantities of fast ions, such as the velocity distribution, particle and energy density, and power deposition. The resulting expressions are applied to the case of a very peaked production profile of fast ions, characterized by particularly strong orbital effects. It is shown that in this case the radial profiles of the fast ions can be significantly different from the source profile, being, for example, strongly non-monotonic. The analysis is carried out for a straight as well as for a tokamak magnetic field. It is predicted that marginally co-passing and semi-trapped particles (i.e. particles that are trapped in only one azimuthal direction) can be transformed to trapped and circulating particles due to electron drag. Collisional constants of motion are obtained.