论文标题
强烈的横向磁场引起的激光 - 血浆限制引起的增强X射线发射
Enhanced x-ray emission arising from laser-plasma confinement by a strong transverse magnetic field
论文作者
论文摘要
我们使用实验和3D MHD数值模拟，由激光（1 ns，10 $^{12} $ -10 $^{13} $^{13} $ w/cm $^2 $烧蚀的等离子体的动力学和辐射特性，从固体目标上扩展到同质的强度磁场（横向上30 t）。我们发现，膨胀开始后约2 ns，血浆会受到磁场的约束。随着磁场强度的提高，更多的血浆被限制在靠近目标附近，并通过磁压缩加热。我们还观察到一块密集的平板，该平板在〜8 ns之后迅速扩展到真空中。但是，该平板仅包含总血浆的约2％。由于较高的密度和加热的加热，磁化强度引起的总X射线发射率的净增强。
We analyze, using experiments and 3D MHD numerical simulations, the dynamics and radiative properties of a plasma ablated by a laser (1 ns, 10$^{12}$-10$^{13}$ W/cm$^2$) from a solid target, as it expands into a homogeneous, strong magnetic field (up to 30 T) transverse to its main expansion axis. We find that as soon as 2 ns after the start of the expansion, the plasma becomes constrained by the magnetic field. As the magnetic field strength is increased, more plasma is confined close to the target and is heated by magnetic compression. We also observe a dense slab that rapidly expands into vacuum after ~ 8 ns; however, this slab contains only ~ 2 % of the total plasma. As a result of the higher density and increased heating of the confined plasma, there is a net enhancement of the total x-ray emissivity induced by the magnetization.
