Manipulation and optimization of electron transport by nanopore array targets

• 作 者: Yue YANG Boyuan LI Yuchi WU Bin ZHU Bo ZHANG Zhimeng ZHANG Minghai YU Feng LU Kainan ZHOU Lianqiang SHAN Lihua CAO Zongqing ZHAO Weimin ZHOU Yuqiu GU
• 机 构: Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang 621900,People’s Republic
• 出 处: 等离子体科学和技术（英文版）
• 发表日期: 2021年1期
• 关键词: nanopore array laser-driven electrons fast electron transport electron collimati

The transport of sub-picosecond laser-driven fast electrons in nanopore array targets is studied.Attributed to the generation of micro-structured magnetic fields,most fast electron beams are proven to be effectively guided and restricted during the propagation.Different transport patterns of fast electrons in the targets are observed in experiments and reproduced by particle-in-cell simulations,representing two components:initially collimated low-energy electrons in the center and high-energy scattering electrons turning into surrounding annular beams.The critical energy for confined electrons is deduced theoretically.The electron guidance and confinement by the nano-structured targets offer a technological approach to manipulate and optimize the fast electron transport by properly modulating pulse parameters and target design,showing great potential in many applications including ion acceleration,microfocus x-ray sources and inertial confinement fusion.