邀请人：李玉同 研究员（Tel：82648014）

主办单位：中国科学院光物理重点实验室

摘要：

Laser-driven particle accelerators have attracted significant attention because of their ability to sustain orders of magnitude larger acceleration gradients compared to conventional radio-frequency-based systems. Here we report our recent progress on laser-driven ion acceleration and neutron generation. We reveal that even under ideal radiation pressure acceleration, only a power-law energy spectrumdNp/dEp∝Ep-q, rather than a quasimonoenergetic one, is predicted by theory when full three-dimensional spatial dynamics are considered. We discuss potential paths to breaking the spectral universality and achieving quasimonoenergetic proton beams and show our recent experimental results. Building on such laser-driven ion beams, we present their application to the generation of high-flux neutron sources and explore their potential for radiation-effects studies.

简介：

沈晓飞，研究员，北京大学博雅青年学者，国家级青年人才。2014年武汉大学物理科学与技术学院获学士学位；2019年北京大学物理学院获理学博士学位。曾在德国杜塞尔多夫大学、德国马克斯∙普朗克核物理研究所从事研究。主要从事于激光等离子体物理和高能量密度物理的理论与实验研究，包括强激光驱动粒子加速及其在核物理、辐照物理等方面的应用以及新型辐射源和强场量子电动力学等研究。近年来，在Physical Review Letters、Physical Review X等重要学术期刊发表SCI论文近40篇，曾获德国洪堡学者、蔡诗东等离子体物理奖等，主持科技部重点研发青年科学家项目、国家自然科学基金委面上项目、中物院某重大科技专项等项目。