Guided post-acceleration of laser-driven ions by a miniature modular structure.
Guided post-acceleration of laser-driven ions by a miniature modular structure.
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DOI：
10.1038/ncomms10792
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发表时间：
2016-04-18
影响因子：
16.6
通讯作者：
Borghesi M
中科院分区：
文献类型：
--
作者：
Kar S;Ahmed H;Prasad R;Cerchez M;Brauckmann S;Aurand B;Cantono G;Hadjisolomou P;Lewis CL;Macchi A;Nersisyan G;Robinson AP;Schroer AM;Swantusch M;Zepf M;Willi O;Borghesi M
粒子加速的全光学方法目前在国际上吸引了大量的研究工作。尽管激光驱动离子束的特征在于特殊的横向和纵向发射度，但目前在峰值离子能量、能谱带宽和束发散度方面存在局限性。在这里，我们介绍了一个多功能的，微型线性加速模块的概念，其中，通过采用激光激发的电磁脉冲引导沿着围绕激光加速离子束的螺旋路径，同时解决了这些缺点。在一个大学规模的系统上进行的原理验证实验中，我们演示了激光驱动质子从扁平箔中以0.5 GeV m−1的速率进行后加速，这已经超出了传统加速器技术所能承受的范围，具有动态光束准直和能量选择。这些结果为开发用于现有和创新应用的极其紧凑和具有成本效益的离子加速器开辟了新的机会。 强激光驱动的加速机制是实现紧凑型粒子加速器的一个重要途径。在这里，作者提出了一个微型线性加速模块的激光驱动质子从箔，解决峰值能量，带宽和光束发散度方面的限制。
All-optical approaches to particle acceleration are currently attracting a significant research effort internationally. Although characterized by exceptional transverse and longitudinal emittance, laser-driven ion beams currently have limitations in terms of peak ion energy, bandwidth of the energy spectrum and beam divergence. Here we introduce the concept of a versatile, miniature linear accelerating module, which, by employing laser-excited electromagnetic pulses directed along a helical path surrounding the laser-accelerated ion beams, addresses these shortcomings simultaneously. In a proof-of-principle experiment on a university-scale system, we demonstrate post-acceleration of laser-driven protons from a flat foil at a rate of 0.5 GeV m−1, already beyond what can be sustained by conventional accelerator technologies, with dynamic beam collimation and energy selection. These results open up new opportunities for the development of extremely compact and cost-effective ion accelerators for both established and innovative applications. Intense laser-driven acceleration mechanisms are promising for the realization of compact particle accelerators. Here, the authors present a miniature linear accelerating module for laser-driven protons from a foil that addresses limitation in terms of peak energy, bandwidth and beam divergence.