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Monoenergetic High-Energy Ion Source via Femtosecond Laser Interacting with a Microtape
Physical Review X ( IF 12.5 ) Pub Date : 2021-10-04 , DOI: 10.1103/physrevx.11.041002
X. F. Shen , A. Pukhov , B. Qiao

Intense laser-plasma ion sources are characterized by an unsurpassed acceleration gradient and exceptional beam emittance. They are promising candidates for next-generation accelerators towards a broad range of potential applications. However, the laser-accelerated ion beams available currently have limitations in energy spread and peak energy. Here, we propose and demonstrate an all-optical single laser scheme to generate proton beams with low spread at about 1% level and hundred MeV energy by irradiating the edge of a microtape with a readily available femtosecond petawatt laser. Three-dimensional particle-in-cell simulations show that when the electron beam extracted from both sides of the tape is injected into vacuum, a longitudinal bunching and transverse focusing field is self-established because of its huge charge (about 100 nC) and small divergence. Protons are accelerated and bunched simultaneously, leading to a monoenergetic high-energy proton beam. The proposed scheme opens a new route for the development of future compact ion sources.

中文翻译:

通过飞秒激光与微带相互作用的单能高能离子源

强激光等离子体离子源的特点是无与伦比的加速度梯度和出色的光束发射率。它们是面向广泛潜在应用的下一代加速器的有希望的候选者。然而,目前可用的激光加速离子束在能量传播和峰值能量方面存在局限性。在这里,我们提出并展示了一种全光学单激光器方案,通过用现成的飞秒拍瓦激光器照射微带边缘,产生约 1% 水平和 100 MeV 能量的低扩散质子束。三维粒子胞内模拟表明,当从胶带两侧提取的电子束注入真空时,由于其巨大的电荷(约 100 nC)和小的发散度,纵向聚束和横向聚焦场是自建的。质子同时加速和聚集,形成单能高能质子束。该方案为未来致密离子源的发展开辟了一条新途径。
更新日期:2021-10-06
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