Measurement of electron beam transverse slice emittance using a focused beamline

被引：3

作者：

Jiang, Kangnan ^{[1
,3
]}

Feng, Ke ^{[1
,2
,4
,5
]}

Wang, Hao ^{[1
,2
]}

Yang, Xiaojun ^{[1
,2
]}

Bai, Peile ^{[1
,2
]}

Xu, Yi ^{[1
,2
]}

Leng, Yuxin ^{[1
,2
]}

Wang, Wentao ^{[1
,2
,4
,5
]}

Li, Ruxin ^{[1
,3
,4
,5
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech SIOM, State Key Lab High Field Laser Phys, Shanghai, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech SIOM, CAS Ctr Excellence Ultraintense Laser Sci, Shanghai, Peoples R China

[3] Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai, Peoples R China

[4] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech SIOM, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China

[5] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech SIOM, CAS Ctr Excellence Ultraintense Laser Sci, Shanghai 201800, Peoples R China

来源：

HIGH POWER LASER SCIENCE AND ENGINEERING | 2023年 / 11卷

基金：

中国国家自然科学基金;

关键词：

beam diagnostic; emittance; laser wakefield acceleration; PLASMA;

D O I：

10.1017/hpl.2023.9

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

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.

引用

页数：7

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