Efficient bright γ-ray vortex emission from a laser-illuminated light-fan-in-channel target

作     者：Hao Zhang Jie Zhao Yanting Hu Qianni Li Yu Lu Yue Cao Debin Zou Zhengming Sheng Francesco Pegoraro Paul McKenna Fuqiu Shao Tongpu Yu 

作者机构：Department of PhysicsNational University of Defense TechnologyChangsha 410073China SUPADepartment of PhysicsUniversity of StrathclydeGlasgow G40NGUK Collaborative Innovation Center of IFSA(CICIFSA)Key Laboratory for Laser Plasmas(MoE)and School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Tsung-Dao Lee InstituteShanghai 200240China Department of Physics Enrico FermiUniversity of Pisaand CNR/INOPisa 56122Italy 

出 版 物：《High Power Laser Science and Engineering》 (高功率激光科学与工程（英文版）)

年 卷 期：2021年第9卷第3期

页      面：68-78页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：supported by the National Key R&D Program of China(Grant No.2018YFA0404802)National Natural Science Foundation of China(Grant Nos.11875319,11705280,11774430,and 11775144) the Science and Technology Innovation Program of Hunan Province(Grant No.2020RC4020) Research Project of NUDT(Grant Nos.ZK18-02-02 and ZK18-03-09) Fok Ying-Tong Education Foundation(Grant No.161007) financial support by Hunan Provincial Research and Innovation Foundation for Graduate Students of China(Grant Nos.CX20190017,CX20190018,CX20200002,and CX20200038) 

主　　题：laser-plasma interaction γ-rays 

摘      要：X/γ-rays have many potential applications in laboratory astrophysics and particle *** several methods have been proposed for generating electron,positron,and X/γ-photon beams with angular momentum(AM),the generation of ultra-intense brilliant γ-rays is still ***,we present an all-optical scheme to generate a high-energy γ-photon beam with large beam angular momentum(BAM),small divergence,and high *** the first stage,a circularly polarized laser pulse with intensity of 10^(22) W/cm^(2) irradiates a micro-channel target,drags out electrons from the channel wall,and accelerates them to high energies via the longitudinal electric *** the process,the laser transfers its spin angular momentum(SAM)to the electrons’orbital angular momentum(OAM).In the second stage,the drive pulse is reflected by the attached fan-foil and a vortex laser pulse is thus *** the third stage,the energetic electrons collide head-on with the reflected vortex pulse and transfer their AM to the γ-photons via nonlinear Compton ***-dimensional particle-in-cell simulations show that the peak brilliance of the γ-ray beam is∼10^(22) photons·s^(-1)·mm^(-2)·mrad^(-2) per 0.1% bandwidth at 1 MeV with a peak instantaneous power of 25 TW and averaged BAM of 10^(6)h/*** AM conversion efficiency from laser to the γ-photons is unprecedentedly 0.67%.