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Measurement of electron beam transverse slice emittance using a focused beamline 被引量:1

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摘要 A single-shot measurement of electron emittance was experimentally accomplished using a focused transfer line with a dipole.The betatron phase of electrons based on laser wakefield acceleration(LWFA)is energy dependent owing to the coupling of the longitudinal acceleration field and the transverse focusing(defocusing)field in the bubble.The phase space presents slice information after phase compensation relative to the center energy.Fitting the transverse size of the electron beam at different energy slices in the energy spectrum measured 0.27 mm mrad in the experiment.The diagnosis of slice emittance facilitates local electron quality manipulation,which is important for the development of LWFA-based free electron lasers.The quasi-3D particle-in-cell simulations matched the experimental results and analysis well.
出处 《High Power Laser Science and Engineering》 SCIE EI CAS CSCD 2023年第3期41-47,共7页 高功率激光科学与工程(英文版)
基金 supported by the National Natural Science Foundation of China (Nos. 11991072, 11875065 and 12105353) the CAS Project for Young Scientists in Basic Research (YSBR060) the State Key Laboratory Program of the Chinese Ministry of Science and Technology the CAS Youth Innovation Promotion Association (Nos. Y201952 and 2022242)
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