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Laser-plasma acceleration of quasi-monoenergetic protons from microstructured targets

机译：来自微结构靶标的准单能质子的激光等离子体加速

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摘要

Particle acceleration based on high intensity laser systems ( a process known as laser - plasma acceleration) has achieved high quality particle beams that compare favourably with conventional acceleration techniques in terms of emittance, brightness and pulse duration(1-4). A long-term difficulty associated with laser - plasma acceleration - the very broad, exponential energy spectrum of the emitted particles - has been overcome recently for electron beams(5-7). Here we report analogous results for ions, specifically the production of quasi-monoenergetic proton beams using laser - plasma accelerators. Reliable and reproducible laser-accelerated ion beams were achieved by intense laser irradiation of solid microstructured targets. This proof-of-principle experiment serves to illuminate the role of laser-generated plasmas as feasible particle sources. Scalability studies show that, owing to their compact size and reasonable cost, such table-top laser systems with high repetition rates could contribute to the development of new generations of particle injectors that may be suitable for medical proton therapy(8-10).
机译：基于高强度激光系统的粒子加速（一种称为激光-等离子加速的过程）已经实现了高质量的粒子束，在发射率，亮度和脉冲持续时间方面都优于传统的加速技术（1-4）。最近，电子束已经克服了与激光有关的长期难题-等离子体加速-所发射粒子的非常宽的指数能谱-（5-7）。在这里，我们报告离子的类似结果，特别是使用激光-等离子体加速器产生准单能质子束。通过对固体微结构靶进行强激光照射，可获得可靠且可重现的激光加速离子束。这项原理验证实验旨在阐明激光产生的等离子体作为可行粒子源的作用。可扩展性研究表明，由于其紧凑的尺寸和合理的成本，这种具有高重复率的台式激光系统可能有助于开发适用于医疗质子治疗的新一代粒子注射器（8-10）。

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