Prompt acceleration of a μ^(+) beam in a toroidal wakefield driven by a shaped steep-rising-front Laguerre–Gaussian laser pulse  

作　　者：Xiaonan WANG Xiaofei LAN Yongsheng HUANG Youge JIANG Chunlei ZHANG Hao ZHANG Tongpu YU 王晓南;兰小飞;黄永盛;蒋又歌;张春雷;张昊;余同普(School of Physics and Astronomy,China West Normal University,Nanchong 637009,People's Republic of China;Key Laboratory of Beam Technology of Ministry of Education,Beijing Normal University,Beijing 100875,People's Republic of China;School of Science,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,People's Republic of China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,People's Republic of China;Department of Physics,National University of Defense Technology,Changsha 410073,People's Republic of China)

机构地区：[1]School of Physics and Astronomy,China West Normal University,Nanchong 637009,People's Republic of China [2]Key Laboratory of Beam Technology of Ministry of Education,Beijing Normal University,Beijing 100875,People's Republic of China [3]School of Science,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,People's Republic of China [4]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,People's Republic of China [5]Department of Physics,National University of Defense Technology,Changsha 410073,People's Republic of China

出　　处：《Plasma Science and Technology》2022年第5期226-236,共11页等离子体科学和技术（英文版）

基　　金：supported in part by the National Key R&D Program of China(No.2018YFA0404802);National Natural Science Foundation of China(No.11875319);the Hunan Provincial Science and Technology Program(No.2020RC4020);Innovation Project of IHEP(Nos.542017IHEPZZBS11820,542018IHEPZZBS12427);the CAS Center for Excellence in Particle Physics(CCEPP),the Meritocracy Research Funds of China West Normal University(No.17YC504)。

摘　　要：Recent experimental data for anomalous magnetic moments strongly indicates the existence of new physics beyond the Standard Model.Energetic μ^(+) bunches are relevant to μ^(+) rare decay,spin rotation,resonance and relaxation(μSR)technology,future muon colliders,and neutrino factories.In this paper,we propose prompt μ^(+) acceleration in a nonlinear toroidal wakefield driven by a shaped steep-rising-front Laguerre–Gaussian(LG)laser pulse.An analytical model is described,which shows that a μ^(+) beam can be focused by an electron cylinder at the centerline of a toroidal bubble and accelerated by the front part of the longitudinal wakefield.A shaped LG laser with a short rise time can push plasma electrons,generating a higher-density electron sheath at the front of the bubble,which can enhance the acceleration field.The acceleration field driven by the shaped steep-rising-front LG laser pulse is about four times greater than that driven by a normal LG laser pulse.Our simulation results show that a 300 MeV μ^(+) bunch can be accelerated to 2 GeV and its transverse size is focused from an initial value of w_(0)=5μm to w=2μm in the toroidal bubble driven by the shaped steep-rising-front LG laser pulse with a normalized amplitude of a=22.

关 键 词：plasma wakefield acceleration muon source laser shaping 

分 类 号：O53[理学—等离子体物理]