Radiation-pressure acceleration of ion beams from nanofoil targets: the leaky light-sail regime.
Radiation-pressure acceleration of ion beams from nanofoil targets: the leaky light-sail regime.
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DOI：
10.1103/physrevlett.105.155002
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发表时间：
2010-10
影响因子：
8.6
通讯作者：
B. Qiao;M. Zepf;M. Borghesi;B. Dromey;M. Geissler;A. Karmakar;P. Gibbon
中科院分区：
文献类型：
--
作者：
B. Qiao;M. Zepf;M. Borghesi;B. Dromey;M. Geissler;A. Karmakar;P. Gibbon
提出了一种新的离子辐射压力加速机制，即“泄漏光帆”，它使用圆偏振激光脉冲照射的亚皮肤深度的纳米薄片。在这种情况下，铝箔是部分透明的，随着传输的激光场不断地泄漏电子。多物种纳米箔结构可以利用这一特征来稳定轻离子成分的加速，为后者补充从与重离子相关的电子泄漏出来的过剩电子，以避免库仑爆炸。二维胞内粒子模拟结果表明，仅用10？⁹W/cm2的圆偏振激光就能产生能量为18 MeV的单能质子束。将束流强度提高到2×10~(-3)⁰W/cm~2，获得了100 MeV的质子束。
A new ion radiation-pressure acceleration regime, the "leaky light sail," is proposed which uses sub-skin-depth nanometer foils irradiated by circularly polarized laser pulses. In the regime, the foil is partially transparent, continuously leaking electrons out along with the transmitted laser field. This feature can be exploited by a multispecies nanofoil configuration to stabilize the acceleration of the light ion component, supplementing the latter with an excess of electrons leaked from those associated with the heavy ions to avoid Coulomb explosion. It is shown by 2D particle-in-cell simulations that a monoenergetic proton beam with energy 18 MeV is produced by circularly polarized lasers at intensities of just 10¹⁹ W/cm². 100 MeV proton beams are obtained by increasing the intensities to 2 × 10²⁰ W/cm².