我们提出了纳米结构表面对来自强(5-36 Petwatt per sq.cm)飞秒激光产生的等离子体的离子和电子的发射的影响。从光学抛光的铜靶涂覆有铜纳米颗粒(CuNP)的电子被观察到比那些未涂覆的抛光靶热。在14-74 keV范围内的离子,观察到近两倍的增强,而离子产率在74-2000 keV范围内减少了2倍。使用大面积法拉第杯测量的总离子产率是更多的从铜NP目标比抛光铜目标,表明由于表面调制离子束发散增加。
英文摘要:
We present the effect of a nanostructured surface on the emission of ions and electrons from intense (5-36 Petwatt per sq.cm) femtosecond laser produced plasmas. Electrons from optically polished copper targets coated with copper nanoparticles (CuNP) are observed to be hotter than those from uncoated polished targets. A nearly two-fold enhancement is observed for ions in the range 14-74 keV, while ion yield decreases by a factor of 2 in the 74-2000 keV range. The total ion yields measured using a large area Faraday cup are more from CuNP targets than those from polished Cu targets, indicating increased ion beam divergence due to surface modulations.
Raman spectroscopic characterization of crater walls formed upon single-shot high energy femtosecond laser irradiation of dimethacrylate polymer doped with plasmonic gold nanorods
Rippled area formed by surface plasmon polaritons upon femtosecond laser double-pulse irradiation of silicon: the role of carrier generation and relaxation processes
Bright, directional electron emission from nanowire coated targets under petawatt, femtosecond irradiation
Tata Institute of Fundamental Research(塔塔基础研究所);Extreme Light Infrastructure - Nuclear Physics (ELI-NP)(极轻基础设施-核物理(ELI-NP));“Horia Hulubei” National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)(“霍里亚·胡卢贝伊”国家物理与核工程研发研究所(IFIN-HH));National University of Science and Technology POLITEHNICA Bucharest(布加勒斯特理工大学国立科技大学);University of Osaka(大阪大学)
本文讨论了利用圆偏振激光脉冲产生的超短离子束驱动亚光周期聚变中子源的可能性。薄箔氘靶的双面辐照产生两个反向运动的离子束,它们的碰撞导致超短中子爆发。使用粒子模拟和分析建模,它是评估,对于几个$10^{19} W cm^{-2}$的强度,超过$10^3$中子每焦耳可以在短于一个飞秒的时间内产生。另一个计划的基础上,分层氘氚目标概述。
Tens of MeV, collimated, bright fluxes of protons from ordered nano-structured targets in ultra-relativistic laser-matter interaction
Tata Institute of Fundamental Research(塔塔基础研究所);Extreme Light Infrastructure - Nuclear Physics (ELI-NP)(极光大基础设施-核物理(ELI-NP));“Horia Hulubei” National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH)(“霍里亚·胡卢贝伊”核物理与核工程研发国家研究所(IFIN-HH));National University of Science and Technology POLITEHNICA Bucharest(布加勒斯特理工大学国家科学与技术大学);University of Osaka(大阪大学);National Institute for Laser, Plasma and Radiation Physics(激光、等离子体与辐射物理国家研究所)