Theoretical Study on Steady Sustaining a D-^3He Fueled Field Reversed Configuration Reactor

我们对旋转磁场对磁场反转结构的电流维持进行了数值模拟。在产生场反转配置后，外部施加的旋转磁场迅速渗透到FRC中，并在由于焦耳耗散而断开之前驱动稳定电流。维持平衡的旋转磁场的阈值只有轴向磁场的10%。模态为m=1或2的RMF给出了类似的结果。结果表明，在FRC上施加RMF的方法可以有效地将热致密FRC维持在稳定状态。本文还从理论上研究了外加旋转磁场保持稳态的反场结构的平衡。我们对离子和电子的动量方程进行了解析求解，得到了离子和电子以不同速度旋转的FRC与RMF稳定平衡的解析解。研究表明，以往研究忽略的径向异常扩散在平衡中起着重要作用。1996年10月5日，在伊利诺伊大学举行的第16届IEEE/NPSS聚变工程研讨会上，该杰出论文奖被授予了前研究。

We have carried out the numerical simulation on current sustainment of a field-reversed configuration by a rotating magnetic field. The rotating magnetic field externally applied just after producing the field-reversed configuration by a theta pinch discharge is penetrated rapidly into the FRC,and drive a steady current before it breaks due to Joule dissipation. The threshold of a rotating magnetic field to sustain the equilibrium is as small as 10% of the axial magnetic field. The RMF's with the mode number of m=1 or 2 give the similar results. It has been revealed that the method of applying a RMF to an FRC may be effective for sustaining the hot and dense FRC in a steady state.The equilibrium of a field-reversed configuration (FRC) with the rotating magnetic field (RMF) externally applied for keeping the steady state is also studied theoretically. We have solved the momentum equations of ions and electrons analytically and found the analytical solution of a steady equilibrium of the FRC with the RMF,in which the ions and electrons rotate at the different velocities. It has been revealed that the radial anomalous diffusion neglected in previous studies plays an important role in the equilibrium.The distinguished paper award was conferred on the former study in 16th IEEE/NPSS Symposium on Fusion Engineering held at University of Illinois on October 5,1996.