中国物理B ›› 2024, Vol. 33 ›› Issue (8): 85202-085202.doi: 10.1088/1674-1056/ad4531

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

Chuan-Yi Xi(奚传易)1, Yin-Ren Shou(寿寅任)2, Li-Qi Han(韩立琦)1, Abdughupur Ablimit(阿卜杜伍普尔·阿布力米提)1, Xiao-Dan Liu(刘晓丹)1, Yan-Ying Zhao(赵研英)3,†, and Jin-Qing Yu(余金清)1   

  1. 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
  • 收稿日期:2024-02-27 修回日期:2024-04-23 出版日期:2024-08-15 发布日期:2024-07-15
  • 通讯作者: Yan-Ying Zhao E-mail:zhaoyanying@pku.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11921006 and 12175058), the Beijing Distinguished Young Scientist Program and National Grand Instrument Project (Grant No. SQ2019YFF01014400), and the Beijing Municipal Science & Technology Commission, Administrative Commission of Zhongguancun Science Park (Grant No. Z231100006023003). The PIC code EPOCH was in part funded by United Kingdom EPSRC (Grant Nos. EP/G054950/1, EP/G056803/1, EP/G055165/1, and EP/M022463/1).

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

Chuan-Yi Xi(奚传易)1, Yin-Ren Shou(寿寅任)2, Li-Qi Han(韩立琦)1, Abdughupur Ablimit(阿卜杜伍普尔·阿布力米提)1, Xiao-Dan Liu(刘晓丹)1, Yan-Ying Zhao(赵研英)3,†, and Jin-Qing Yu(余金清)1   

  1. 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
  • Received:2024-02-27 Revised:2024-04-23 Online:2024-08-15 Published:2024-07-15
  • Contact: Yan-Ying Zhao E-mail:zhaoyanying@pku.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11921006 and 12175058), the Beijing Distinguished Young Scientist Program and National Grand Instrument Project (Grant No. SQ2019YFF01014400), and the Beijing Municipal Science & Technology Commission, Administrative Commission of Zhongguancun Science Park (Grant No. Z231100006023003). The PIC code EPOCH was in part funded by United Kingdom EPSRC (Grant Nos. EP/G054950/1, EP/G056803/1, EP/G055165/1, and EP/M022463/1).

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摘要： 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 $3.7\times 10^{22}$ to $5.5\times 10^{22} $ photons/(0.1%BW$\cdot$s$\cdot$mm$^{2}\cdot$mrad$^{2}$) 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.

关键词: betatron, plasma physics, x-ray, plasma wakefield acceleration (PWFA)

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 $3.7\times 10^{22}$ to $5.5\times 10^{22} $ photons/(0.1%BW$\cdot$s$\cdot$mm$^{2}\cdot$mrad$^{2}$) 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)

中图分类号:  (X-ray, γ-ray, and particle generation)

  • 52.38.Ph
52.40.-w (Plasma interactions (nonlaser)) 52.65.Rr (Particle-in-cell method)