Research for rotational equilibrium and transport model of steady burning D-^3He plasma in the field-reversed configuration

从理论上研究了柱状等离子体在加注和动量注入下的稳态。结果表明，粒子注入或产生的抗磁电流产生的压力梯度只能维持扩散的线性箍缩构型的平衡。对于极长的FRC，其中磁场在某一点消失，需要种子电流来维持稳态平衡中的构型。聚变产生的质子的定向流动形成种子电流，因此它只在D-^3He燃烧发生一次时提供燃料，从而维持稳定的FRC平衡。通过在等离子体边缘注入大量的燃料粒子，可以获得超高β等离子体的持续。在这种情况下，等离子体的流动速度很小，因此在FRC的等离子体中心附近和平坦压力分布区域的自举电流也很小。从平衡出发，我们估计了损失粒子的比例，并提出了利用行波直接能量转换方法来产生15 MeV的聚变产生的质子。通过求解自洽电路和粒子方程，阐明了熔合质子在TWDEC中的详细行为。

The steady state of cylindrical plasma with fueling and momentum injection is studied theoretically. It is shown that a pressure gradient produced by the particle injection or resultant diamagnetic current can sustain only an equilibrium of a diffused linear pinch configuration. For an extremely elongated FRC where magnetic field vanishes at a certain point, a seed current is needed to sustain configuration in a steady state equilibrium. A directed flow of fusion produced protons forms a seed current and consequently it sustains a steady FRC equilibrium by fueling only once D-^3He burning takes place. Sustainment of very high beta plasma is got by injecting large amount of fuel particle at the plasma edge. The flow velocity of the plasma is small in this case and accordingly bootstrap current is small at the vicinity of the plasma center of the FRC and region of flat pressure profile extends.From the equilibrium we studied, the loss particle fraction are estimated and the direct energy conversion method using traveling wave (TWDEC) for fusion produced protons with 15 MeV is proposed. The detail behavior of fusion protons in this TWDEC is clarified by solving the self-consistent circuit and particle equations.