Ponderomotive Barrier as a Maxwell Demon
Ponderomotive Barrier as a Maxwell Demon
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有质动力屏障作为麦克斯韦妖
DOI：
10.1063/1.1787771
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发表时间：
2004
影响因子：
2.2
通讯作者：
J. Rax
中科院分区：
文献类型：
--
作者：
I. Dodin;N. Fisch;J. Rax
最近在 [N. J. Fisch、J. M. Rax 和 I. Y. Dodin，物理学家。莱特牧师。 91、205004(2003)]。现在，通过对各种场配置中回旋共振射频驱动器作用下的单粒子动力学进行全面的分析和数值研究，给出了对效率的精确限制。获得了沿直流磁场的粒子能量增益和加速度的表达式。描述了两种效应之间的基本相关性。第二个基本量，即势垒与能量增益的比率，可以通过改变场配置来改变。通过最小化横向加热，可以优化非对称有质动力电流驱动效应。
The possibility of efficient ponderomotive current drive in a magnetized plasma was reported recently in [N. J. Fisch, J. M. Rax, and I. Y. Dodin, Phys. Rev. Lett. 91, 205004 (2003)]. Precise limitations on the efficiency are now given through a comprehensive analytical and numerical study of single-particle dynamics under the action of a cyclotron-resonant rf drive in various field configurations. Expressions for the particle energy gain and acceleration along the dc magnetic field are obtained. The fundamental correlation between the two effects is described. A second fundamental quantity, namely, the ratio of the potential barrier to the energy gain, can be changed by altering the field configuration. The asymmetric ponderomotive current drive effect can be optimized, by minimizing the transverse heating.