Picosecond metrology of laser-driven proton bursts.
Picosecond metrology of laser-driven proton bursts.
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DOI：
10.1038/ncomms10642
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发表时间：
2016-02-10
影响因子：
16.6
通讯作者：
Zepf M
中科院分区：
文献类型：
--
作者：
Dromey B;Coughlan M;Senje L;Taylor M;Kuschel S;Villagomez-Bernabe B;Stefanuik R;Nersisyan G;Stella L;Kohanoff J;Borghesi M;Currell F;Riley D;Jung D;Wahlström CG;Lewis CL;Zepf M
追踪物质中的初级辐射诱导过程需要超快的源和高精度的计时。虽然紧凑型激光驱动离子加速器正在推动新型高瞬时通量应用的发展，但将超短离子和激光脉冲的持续时间与其固有的同步性结合起来跟踪初始损伤事件的实时演化尚未实现。本文报道了激光与固体靶相互作用产生的质子爆发的绝对测量结果，最短为3.5±0.7 ps。我们的结果证明，激光驱动的离子加速可以提供比优化为高瞬时通量的最先进加速器短数百倍以上的相互作用时间。此外，这些观测将离子相互作用物理引入超快科学领域，为与数值模型和物质中超快电子和光子相互作用的相邻领域进行定量比较打开了机会。物质对电离响应的实验研究需要极快的离子泵脉冲。在这里，作者探索了一种不同的方法来观测二氧化硅玻璃中的电离动力学，方法是从高功率激光与固体靶的相互作用中产生同步的质子脉冲。
Tracking primary radiation-induced processes in matter requires ultrafast sources and high precision timing. While compact laser-driven ion accelerators are seeding the development of novel high instantaneous flux applications, combining the ultrashort ion and laser pulse durations with their inherent synchronicity to trace the real-time evolution of initial damage events has yet to be realized. Here we report on the absolute measurement of proton bursts as short as 3.5±0.7 ps from laser solid target interactions for this purpose. Our results verify that laser-driven ion acceleration can deliver interaction times over a factor of hundred shorter than those of state-of-the-art accelerators optimized for high instantaneous flux. Furthermore, these observations draw ion interaction physics into the field of ultrafast science, opening the opportunity for quantitative comparison with both numerical modelling and the adjacent fields of ultrafast electron and photon interactions in matter. Experimental investigations of the response of matter to ionization would require extremely fast ion pump pulses. Here, the authors explore a different approach observing ionisation dynamics in SiO2 glass by generating synchronized proton pulses from the interaction of high-power lasers on a solid target.