Structure study of a dielectric laser accelerator with discrete translational symmetry  

作　　者：何阳帆 孙斌 马铭江 李伟 崔志浩 赵宗清 Yangfan He;Bin Sun;Mingjiang Ma;Wei Li;Zhihao Cui;Zongqing Zhao(Laser Fusion Research Center,CAEP,Mianyang 621900,China;The Sciences and Technology on Plasma Physics Laboratory,CAEP,Mianyang 621900,China;University of Science and Technology of China,Hefei 230026,China;The Institute of Optics,University of Rochester,Rochester,NY 14627,USA)

机构地区：[1]Laser Fusion Research Center,CAEP,Mianyang 621900,China [2]The Sciences and Technology on Plasma Physics Laboratory,CAEP,Mianyang 621900,China [3]University of Science and Technology of China,Hefei 230026,China [4]The Institute of Optics,University of Rochester,Rochester,NY 14627,USA

出　　处：《Chinese Physics B》2023年第11期413-418,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 11975214)。

摘　　要：The dielectric laser accelerator(DLA) is a promising technology for achieving high-gradient acceleration in a compact design. Its advantages include ease of cascading and an energy gain per unit distance which can exceed that of conventional accelerators by two orders of magnitude. This paper establishes rules for efficient particle acceleration using dielectric structures based on basic equations, proposes a design principle for DLA structures with clear physical images and verifies the accuracy of the corresponding formula for energy gain. DLA structures with different specifications, materials and geometric shapes are constructed, and the achievable acceleration gradient is calculated. Our results demonstrate that effective acceleration can be achieved when the electric field sensed by particles in the acceleration cavity has zero frequency,which provides a powerful method for designing such devices. Furthermore, we demonstrate that the simplified formula for calculating energy gain presented in this paper can accurately determine the energy gain of particles during the design of acceleration structures using a dielectric accelerator.

关 键 词：dielectric laser accelerator acceleration structure high-gradient accelerator 

分 类 号：TL50[核科学技术—核技术及应用]