Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Phys Rev Lett. 2011 Jul 22;107(4):045003. doi: 10.1103/PhysRevLett.107.045003. Epub 2011 Jul 20.
Breakout afterburner (BOA) laser-ion acceleration has been demonstrated for the first time in the laboratory. In the BOA, an initially solid-density target undergoes relativistically induced transparency, initiating a period of enhanced ion acceleration. First-ever kinetic simulations of the BOA in three dimensions show that the ion beam forms lobes in the direction orthogonal to laser polarization and propagation. Analytic theory presented for the electron dynamics in the laser ponderomotive field explains how azimuthal symmetry breaks even for a symmetric laser intensity profile; these results are consistent with recent experiments at the Trident laser facility.
实验室首次成功演示了烧蚀体背向光抽运激光离子加速（BOA）。在 BOA 中，初始为固体密度的靶体经历相对论诱导透明，从而引发增强的离子加速阶段。BOA 在三维空间中的首次动力学模拟表明，离子束在垂直于激光偏振和传播方向上形成瓣状结构。针对激光 ponderomotive 场中电子动力学提出的解析理论解释了即使对于对称的激光强度分布，如何打破角向对称性；这些结果与 Trident 激光设施的最新实验结果一致。
