A Scalable,High-Efficiency,Low-Energy-Spread Laser Wakefield Accelerator Using a Tri-Plateau Plasma Channel  

作　　者：Shuang Liu Fei Li Shiyu Zhou Jianfei Hua Warren B.Mori Chan Joshi Wei Lu 

机构地区：[1]Department of Engineering Physics,Tsinghua University,Beijing 100084,China [2]University of California Los Angeles,Los Angeles,CA 90095,USA [3]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [4]Beijing Academy of Quantum Information Science,Beijing 100193,China

出　　处：《Research》2025年第1期955-965,共11页研究(英文)

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(grant nos.XDB0530000 and XDB0530100);National Natural Science Foundation of China(grant nos.11991071,12375241,12305152,and 11991073);Discipline Construction Foundation of“Double World-class Project,”and was funded in part by the National Science and Technology Major Project(grant no.2019-VII-0019-0161);C.J.and W.B.M.were partially supported by U.S.DoE grant DE-SC0010064:0011;W.B.M.was also partially supported by U.S.NSF grant 2108970;The simulation work is supported by Center of High Performance Computing,Tsinghua University.

摘　　要：The emergence of multi-petawatt laser facilities is expected to push forward the maximum energy gain that can be achieved in a single stage of a laser wakefield acceleration(LWFA)to tens of giga-electron volts,which begs the question-is it likely to impact particle physics by providing a truly compact particle collider?Colliders have very stringent requirements on beam energy,acceleration efficiency,and beam quality.In this article,we propose an LWFA scheme that can for the first time simultaneously achieve hitherto unrealized acceleration efficiency from the laser to the electron beam of>20%and a sub-1%energy spread using a stepwise plasma structure and a nonlinearly chirped laser pulse.Three-dimensional high-fidelity simulations show that the nonlinear chirp can effectively mitigate the laser waveform distortion and lengthen the acceleration distance.This,combined with an interstage rephasing process in the stepwise plasma,can triple the beam energy gain compared to that in a uniform plasma for a fixed laser energy,thereby dramatically increasing the efficiency.A dynamic beam loading effect can almost perfectly cancel the energy chirp that arises during the acceleration,leading to the sub-percent energy spread.This scheme is highly scalable and can be applied to petawatt LWFA scenarios.Scaling laws are obtained,which suggest that electron beams with parameters relevant for a Higgs factory could be reached with the proposed high-efficiency,low-energy-spread scheme.

关 键 词：laser wakefield acceleration particle physics particle collidercolliders multi petawatt laser tri plateau plasma channel acceleration efficiency 

分 类 号：O572.3[理学—粒子物理与原子核物理] O572.33[理学—物理]