主讲人：闫文超，上海交通大学长聘教轨副教授
时 间：2020年11月09日9:30
地 点：物电学院A栋219
联系人：余金清
讲座摘要：Electron–photon scattering, or Thomson/Compton scattering, is one of the most fundamental mechanisms in electrodynamics, underlying laboratory and astrophysical sources of high-energy X-rays. After a century of studies, it is only recently that sufficiently high electromagnetic field strengths have been available to experimentally study the nonlinear regime of the scattering in the laboratory. This can act as a new generation of accelerator-based hard X/γ-ray sources driven exclusively by laser light. One ultrahigh intense CPA laser pulses will act as two means: first used to accelerate electrons by laser driven wake field (LWFA) to hundreds MeV, and second, from split beam or LWFA-leftover energy reflected by plasma mirror, to collide on the electron for the generation of X/γ-rays. Such all-laser-driven X/γ source have recently been demonstrated to be energetic, tunable, narrow/broad in bandwidth, short pulsed and well collimated. Such characteristics, especially from a compact source, are highly advantageous for numerous advanced X-ray applications. Moreover, the scattering interaction can act a test bed for high-field QED study. Also, preliminary plan of laser wake-field accelerator and radiation source in high-power laser facility in SJTU and TDLI will be presented.
主讲人简介：闫文超，上海交通大学长聘教轨副教授、博士生导师。入选2020年上海市高层次人才计划专家。曾在美国劳伦斯•利弗莫尔国家实验室、内布拉斯加大学强光实验室开展实验。回国前在欧盟重大科研项目极端强光基础设施（ELI）任高级研究员（Senior Researcher），期间负责设计和建设10PW激光加速和辐射源实验平台。主要从事超快超强激光驱动的等离子体电子加速及辐射研究。发表SCI论文40余篇，包括Nature Photonics, PNAS、PRL等重要文章，主要成果曾入选2014年“中国光学重要成果”，其中ESI高被引论文1篇。在国际学术会议中做大会报告、特邀报告共十余次，部分研究成果在【怀柔综合极端条件SECUF】等国家重大科技设施中实现了重要应用。
