Numerically optimized structures for dielectric asymmetric dual-grating laser accelerators
Numerically optimized structures for dielectric asymmetric dual-grating laser accelerators
复制标题
介电非对称双光栅激光加速器的数值优化结构
DOI：
10.1063/1.4866020
复制
发表时间：
2014-02-01
影响因子：
2.2
通讯作者：
Koyama, K.
中科院分区：
文献类型：
--
作者：
Aimidula, A.;Bake, M. A.;Koyama, K.
光学尺度介质结构是实现未来紧凑、低成本粒子加速器的有希望的候选者，因为它们可以维持GeV/m范围内的高加速梯度。在这里，我们提出了一种介质非对称双光栅加速器的数值模拟结果。研究发现，非对称双光栅结构可以有效地修改激光场，使其与相对论电子同步，因此与对称结构相比，平均加速梯度增加了约10%。模拟计算得到的最佳煤柱高度与解析估算值吻合较好。讨论了注入电子的初始动能对加速梯度的影响。最后，分析计算了所需的激光参数，并提出了一个合适的激光器作为能源。
Optical scale dielectric structures are promising candidates to realize future compact, low cost particle accelerators, since they can sustain high acceleration gradients in the range of GeV/m. Here, we present numerical simulation results for a dielectric asymmetric dual-grating accelerator. It was found that the asymmetric dual-grating structures can efficiently modify the laser field to synchronize it with relativistic electrons, therefore increasing the average acceleration gradient by ∼10% in comparison to symmetric structures. The optimum pillar height which was determined by simulation agrees well with that estimated analytically. The effect of the initial kinetic energy of injected electrons on the acceleration gradient is also discussed. Finally, the required laser parameters were calculated analytically and a suitable laser is proposed as energy source.