Tunable energy spectrum betatron x-ray sources in a plasma wakefield

奚传易 ¹寿寅任 ²韩立琦 ¹阿卜杜伍普尔·阿布力米提 ¹刘晓丹 ¹赵研英 ³余金清¹

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作者信息

1. Hunan Provincial Key Laboratory of High-Energy Scale Physics and Applications,School of Physics and Electronics,Hunan University,Changsha 410082,China
2. Center for Relativistic Laser Science,Institute for Basic Science,Gwangju,Korea
3. State Key Laboratory of Nuclear Physics and Technology,and Key Laboratory of HEDP of the Ministry of Education,CAPT,Peking University,Beijing 100871,China
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Abstract

X-ray sources with tunable energy spectra have a wide range of applications in different scenarios due to their different penetration depths.However,existing x-ray sources face difficulties in terms of energy regulation.In this paper,we present a scheme for tuning the energy spectrum of a betatron x-ray generated from a relativistic electron bunch oscillating in a plasma wakefield.The center energy of the x-ray source can be tuned from several keV to several hundred keV by changing the plasma density,thereby extending the control range by an order of magnitude.At different central energies,the brightness of the betatron radiation is in the range of 3.7 × 1022 to 5.5 × 1022 photons/(0.1％BW·s·mm2·mrad2)and the photon divergence angle is about 2 mrad.This high-brightness,energy-controlled betatron source could pave the way to a wide range of applications requiring photons of specific energy,such as phase-contrast imaging in medicine,non-destructive testing and material analysis in industry,and imaging in nuclear physics.

Key words

betatron/plasma physics/x-ray/plasma wakefield acceleration(PWFA)

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基金项目

National Natural Science Foundation of China(11921006)

National Natural Science Foundation of China(12175058)

Beijing Distinguished Young Scientist Program and National Grand Instrument Project(SQ2019YFF01014400)

Beijing Municipal Science & Technology Commission,Administrative Commission of Zhongguancun science Park(Z231100006023003)

United Kingdom EPSRC(EP/G054950/1)

United Kingdom EPSRC(EP/G056803/1)

United Kingdom EPSRC(EP/G055165/1)

United Kingdom EPSRC(EP/M022463/1)

出版年

2024

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

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