轴向磁场注入到内爆的厚内衬中
Axial magnetic field injection into thick, imploding liners
摘要：
MagLIF是一个相当新的融合概念，使用脉冲发电机作为主要驱动器。该概念使用Z箍缩配置，其中内爆由Z机使用100 ns内的27 MA电流驱动。由于与非磁化等离子体的热扩散时间相比，内爆时间较长，因此MagLIF需要30 T的初始轴向磁场以减少对衬套壁的热损失。由于磁场需要穿透脉冲发电机的传输线以及内衬本身，因此上升时间必须超过数十微秒。任何能够在那么长的脉冲长度上产生这样的场的线圈不可避免地是庞大的。在衬垫附近容纳线圈所需的空间增加了负载的电感，这变得有问题，因为负载处的电压不能超过驱动器已经可以提供的电压。然而，Z机可以提供的巨大电流量可以通过倾斜围绕衬垫的电流柱来产生所需的30 T。然而，场穿透受到内衬壁的集肤效应的限制。本文表明，当电流密度足够大时，材料会产生电阻率梯度，迫使电流扩散通过衬管壁，速度比趋肤时间快得多。因此，30T线圈可以被取消，并由具有最小螺旋度的回流柱取代。
英文摘要：
MagLIF is a fairly new fusion concept using a puled-power generator as the main driver. This concept uses a Z-pinch configuration where the implosion is driven by the Z-machine using 27 MA of electrical current in 100 ns. Since the implosion time is long compared to the heat diffusion time of a non-magnetized plasma, MagLIF requires an initial axial magnetic of 30T to reduce heat losses to the liner wall. Since the field needs to penetrate the transmission lines of the pulsed-power generator, as well as the liner itself, the rise time must exceed tens of microseconds. Any coil capable of producing such field on that long a pulse-length is inevitably bulky. The space required to house the coil near the liner increase the inductance of the load, which becomes problematic since the voltage at the load cannot exceed what the driver can already provide. Yet, the enormous amount of current that the Z-machine can provide could be used to produce the required 30 T by tilting the current posts surrounding the liner. However, the field penetration is limited by the skin effect of the liner wall. This paper shows that when current densities are large enough, the material generate resistivity gradients which forces the current to diffusive across the liner wall much fast than the skin time. As a result, the 30T coil can be eliminated and replaced by return current posts with minimal helicity.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
