Autofocused, enhanced proton acceleration from a nanometer-scale bulged foil
Autofocused, enhanced proton acceleration from a nanometer-scale bulged foil
复制标题
DOI：
10.1063/1.3503610
复制
发表时间：
2010-11
影响因子：
2.2
通讯作者：
Haochuan Wang;X. Yan;Y. Lu;F. Zheng;Z. Guo;Wenjun Ma;Xiantu He;T. Tajima;D. Habs;J. Chen
中科院分区：
文献类型：
--
作者：
Haochuan Wang;X. Yan;Y. Lu;F. Zheng;Z. Guo;Wenjun Ma;Xiantu He;T. Tajima;D. Habs;J. Chen
我们报告了一个自动聚焦，增强质子加速通过一个强大的激光脉冲与一个凸起的目标的相互作用。这些结果是通过使用真实的高斯激光脉冲，通常入射到凸起/平面的60 nm厚箔（C:H=1:1）的二维细胞内粒子模拟得到的。当激光脉冲击中预弯曲的目标时，高能质子自动在轴上聚合。对于凸起型箔，由于翼区斜入射，在较大入射角下的有效真空加热将产生比平坦型箔更多的高能热电子。热电子温度和密度的提高将导致更大的纵向场，这有助于质子能量的提高。在线性偏振激光脉冲强度为1.3×1020 W/cm2照射下，凸起靶体的最大质子能量达到124 MeV，是平面靶体（61 MeV）的2倍。
We report an autofocused, enhanced proton acceleration by the interaction of an intense laser pulse with a bulged target. These results are obtained from two-dimensional particle-in-cell simulations using a real Gaussian laser pulse, normally incident on a bulged/planar, 60 nm thick foil (C:H=1:1). When the laser pulse hits the precurved target, energetic protons are converged on the axis automatically. For the bulged foil, due to oblique incidence at the wing region, the efficient vacuum heating at larger incidence angles will result in more energetic hot electrons than from the flat foil. The enhancement of hot electron temperature and density will result in a larger longitudinal field, which contributes to an enhancement of proton energy. The maximum proton energy of 124 MeV is attained from a bulged target irradiated by a linear polarized laser pulse at an intensity of 1.3×1020 W/cm2, which is two times higher than from the planar target (61 MeV).