报告人：Dimitri Batani Visiting Professor（University of Bordeaux）

报告内容：

In recent years several experiments using lasers have been performed on the topic of proton-Boron (p-11B) fusion. However, the number of generated a-particles (which is 3 times the number of nuclear fusion reactions) is usually around a few times 106 aparticles per shot, per unit solid angle, and per Joule of laser energy. There is therefore a clear need to increase such a yield. In the talk, I will present the results of experiments performed at the laser LFEX at the Institute of Laser Engineering of the University of Osaka in Japan. In particular, two experimental campaigns were conducted at the LFEX laser facility using PW-class laser systems (energy ~ 1.2 - 1.4 kJ, duration 2.7 ps, intensity ~2-3 × 1019 W/cm2) to investigate the impact of complex target geometries including spheres, cylinders, and wedges targets on α-particle yield. Our findings reveal that spherical targets produce an increase in α-particle yield up to two orders of magnitude that of flat targets of the same composition, with a notable shift in the α-particle spectrum towards higher energy values. Additionally, we successfully implemented a novel method for unambiguous α-particle detection using CR-39 detector within a Thomson Parabola spectrometer. Particle-in-cell (PIC) simulations with the Smilei code further elucidate the influence of self-generated magnetic fields on particle dynamics, highlighting the intricate relationship between target confinement and fusion efficiency. These results provide valuable insights into the possibility of optimizing target designs for enhancing fusion yield and a-particle generation in pB fusion with possible application to developing laser-driven a-particle sources and a broader relevance to clean energy production. 

报告人简介：

Dimitri Batani，法国波尔多大学特级教授，欧洲科学院院士，欧洲物理学 会会士。高能量密度物理专家。在激光产生等离子体、高能量密度物质状态、激 光驱动的辐射和粒子源、等离子体诊断、惯性约束聚变物理等多个方向上做出了 开拓性的贡献。发表SCI论文400余篇，H因子>40，引用7000余次。获意大利物理 学会(SIF)和法国物理学会联合颁发的“2017年弗里德尔沃尔特拉奖”(Friedel Volterra Prize 2017)以及韩国原子能研究院奖(Award of Korea Atomic Energy Research Institute)。担任Applied Physics B 期刊编辑，Laser and Particle Beams 期刊编委会委员和High Power Laser Science and Engineering 期刊编委 会委员。Matter and Radiation at Extremes 特邀专刊编辑。

主持人：康炜 研究员（北京大学应用物理与技术研究中心）

时  间：2025年10月23日（周四）12:20

地  点：北京大学工学院1号楼210会议室