论文标题
传播热核燃烧时的磁场传输
Magnetic Field Transport in Propagating Thermonuclear Burn
论文作者
论文摘要
惯性融合方案的高能量增益需要从热燃料到冷燃料的热核燃烧波传播。当磁场与燃烧波正交时，我们考虑燃烧传播的问题。使用具有磁化$α$能量传输方程的扩展MHD模型，我们发现磁场可以通过抑制电子热传导和$α$粒子通量来降低燃烧速度。燃烧繁殖过程中的磁场传输会受到竞争效果的影响：通过消融冷燃料，可以从冷到热区域中进行竞争效果，而nernst和$α$粒子通量效应从热燃料到冷燃料的运输场。这些效果加上由于燃烧而引起的温度升高，可能会导致电子厅参数在燃烧前沿迅速生长。这导致在冷燃料和冷燃料之间形成一个自构层的层，从而降低了电子热导率和$α$传输，增加了温度梯度并降低了燃烧的速度。
High energy gain in inertial fusion schemes requires the propagation of a thermonuclear burn wave from hot to cold fuel. We consider the problem of burn propagation when a magnetic field is orthogonal to the burn wave. Using an extended-MHD model with a magnetized $α$ energy transport equation we find that the magnetic field can reduce the rate of burn propagation by suppressing electron thermal conduction and $α$ particle flux. Magnetic field transport during burn propagation is subject to competing effects: field can be advected from cold to hot regions by ablation of cold fuel, while the Nernst and $α$ particle flux effects transport field from hot to cold fuel. These effects, combined with the temperature increase due to burn, can cause the electron Hall parameter to grow rapidly at the burn front. This results in the formation of a self-insulating layer between hot and cold fuel that reduces electron thermal conductivity and $α$ transport, increases the temperature gradient and reduces the rate of burn propagation.
