首页|Divergence angle consideration in energy spread measurement for high-quality relativistic electron beam in laser wakefield acceleration

Divergence angle consideration in energy spread measurement for high-quality relativistic electron beam in laser wakefield acceleration

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The thorough exploration of the transverse quality represented by divergence angle has been lacking yet in the energy spread measurement of the relativistic electron beam for laser wakefield acceleration(LWFA).In this work,we fill this gap by numerical simulations based on the experimental data,which indicate that in a C-shape magnet,magnetic field possesses the beam focusing effect,considering that the divergence angle will result in an increase in the full width at half maxima(FWHM)of the electron density distribution in a uniformly isotropic manner,while the length-to-width ratio decreases.This indicates that the energy spread obtained from the electron deflection distance is smaller than the actual value,regardless of the divergence angle.A promising and efficient way to accurately correct the value is presented by considering the divergence angle(for instance,for an electron beam with a length-to-width ratio of 1.12,the energy spread correct from 1.2％to 1.5％),providing a reference for developing the high-quality electron beam source.

relativistic electron beamsacceleration by laser-plasma interactionsfinite element analysis

卢光伟、李曜均、胡曦辰、陈思宇、徐豪、祝铭阳、闫文超、陈黎明

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Key Laboratory for Laser Plasmas of Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China

IFSA Collaborative Innovation Center,Shanghai Jiao Tong University,Shanghai 200240,China

国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金中国科学院战略规划重点项目中国科学院战略规划重点项目Yangyang Development Fund,China

2021YFA16017001207425111991073123350161230527212105174XDA25000000XDA25030400

2024

10.1088/1674-1056/ad2dcb

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(6)
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