飞秒激光Betatron辐射源的现状与发展趋势分析

黄瑞贤; 奚传易; 韩立琦; 余金清; 余同普; 颜学庆

doi:10.11884/HPLPB202335.220229

飞秒激光Betatron辐射源的现状与发展趋势分析

doi: 10.11884/HPLPB202335.220229

黄瑞贤^{1, 2,},
奚传易¹,
韩立琦¹,
余金清¹,
余同普²,
颜学庆^{3, 4}

1.
湖南大学物理与微电子科学学院高能量物理及应用湖南省重点实验室，长沙 410082
2.
国防科技大学理学院，长沙 410073
3.
北京大学核物理与核技术国家重点实验室，北京 100871
4.
北京怀柔激光加速创新中心，北京 101407

基金项目: 国家自然科学基金项目(11921006; 11535001; 12175058)

详细信息

作者简介:
黄瑞贤，ruixian@hnu.edu.cn

中图分类号: O434.12
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- 被引次数: 0
出版历程
- 收稿日期: 2022-07-18
- 修回日期: 2022-09-13
- 网络出版日期: 2022-09-22
- 刊出日期: 2023-01-15

Current situation and development trend analysis of femtosecond laser Betatron radiation source

1.
Key Laboratory of High Energy Physics and Applications of Hunan Province, School of Physics and Electronics, Hunan University, Changsha 410082, China
2.
College of Science, National University of Defense Technology, Changsha 410073, China
3.
State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
4.
Beijing Laser Acceleration Innovation Center, Beijing 101407, China

摘要

摘要: 在过去的几十年里，超短超强激光在等离子体中激发尾场加速电子束取得了长足的发展，基于该方式获得的高能电子束可以应用于辐射源的产生，其产生的高亮度强辐射源受到了广泛的关注。介绍了超短超强激光脉冲与低密度等离子体相互作用产生Betatron辐射的基本原理和研究现状；结合X-ray应用需求分析了Betatron辐射的发展趋势，发现迫切需要发展基于紧凑型激光装置的尾场电子加速新方案，以突破Beam-loading效应对电量的限制，产生大电量电子束，进而获得高流强的Betatron辐射源；介绍了北京大学颜学庆教授领导的联合团队利用数百TW飞秒激光产生10 nC级大电量高能电子束和单发光子数目为$ 1.0\times {10}^{12} $的Betatron辐射源的新方案。
- 激光辐射源 /
- 等离子体 /
- 飞秒激光 /
- Betatron辐射
Abstract: In the past decades, great progress has been made in laser wakefield acceleration of electron beam inspired by ultra-short intense lasers in plasma. The high-energy electron beam obtained by this method can be applied to the generation of the high-brightness and intense radiation sources, which have attracted extensive attention. In this paper, the basic principle and research status of Betatron radiation generated by laser wakefield acceleration are briefly introduced. The development trend of Betatron radiation is analyzed in combination with the X-ray application requirements. It is found that there is an urgent need to develop a new scheme of laser wakefield electron acceleration based on compact laser device to break through the limit of beam-loading effect on electron charge. By this means, one can generate large charge electron beam and high flux Betatron radiation source. Finally, a new scheme is briefly introduced to generate 10 nC high-energy electron beam and the photon number of Betatron radiation source reach $ 1.0\times {10}^{12} $/shot using hundreds of TW femtosecond laser by a joint team led by Professor Yan Xueqing at Peking Univesity.
- laser radiation source /
- plasma /
- femtosecond laser /
- Betatron radiation

HTML全文

图 1 Betatron辐射源原理图^[7]

Figure 1. Schematic of the Betatron radiation source^[7]

下载: 全尺寸图片幻灯片

图 2 当a₀=20，n_e=0.1n_c时，不同时刻激光与等离子体相互作用过程中等离子体空泡的形成、电子束的注入、电子束与激光共振、空泡不稳定性发展等过程

Figure 2. When a₀=20，n_e=0.1n_c, the formation of plasma bubble, injection of electron beam, resonance of electron beam and laser, development of bubble instability and other processes during the interaction between laser and plasma at different moments

下载: 全尺寸图片幻灯片

图 3 当a₀=20，n_e=0.1n_c时，（a）电子束在500 fs时刻的角-谱分布，（b）产生的Betatron辐射在1.2 ps时刻的角-谱分布，其发散角的半高全宽约6°

Figure 3. When a₀=20, n_e=0.1n_c, (a) angular distribution of electrons at t = 500 fs, (b) the angular distribution of total photons at t = 1.2 ps, and full-width-at-half-maximum (FWHM) about 6°

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表 1 相关Betatron辐射源实验结果统计

Table 1. Statistics of related Betatron radiation source experiments

author	brilliance	photon number per shot	E_c/keV
A. Rousse^[37], 2004	2×10²² ph·s⁻¹·mm⁻²·mrad⁻²·(0.1%bw)⁻¹	1×10⁸	2
S. Kneip^[38], 2008	1×10¹⁷ ph·s⁻¹·mm⁻²·mrad⁻²·(0.1%bw)⁻¹	N/A	36
S. Mangles^[39], 2009	N/A	3×10⁷	5
D. Thorn^[40], 2010	N/A	1×10⁸	1.5
G. Genoud^[41], 2011	5 × 10⁴ ph·mrad⁻²	1×10⁸	1.3
S. Cipiccia^[22], 2011	1×10²³ ph·s⁻¹·mm⁻²·mrad⁻²·(0.1%bw)⁻¹	5×10⁸	50
S. Fourmaux^[42], 2011	2.2×10⁸ ph·(0.1%bw)⁻¹·sr⁻¹	1×10⁹	12.3
J. Ju^[43], 2012	1×10²¹ ph·(0.1%bw)⁻¹·sr⁻¹	1×10⁹	4.6
M. Schnell^[19], 2012	5×10²¹ ph·(0.1%bw)⁻¹·sr⁻¹	2×10⁶	6
X. Wang^[44], 2013	N/A	1×10⁹	30
L. Chen^[27], 2013	5×10²¹ ph·(0.1%bw)⁻¹·sr⁻¹	2×10⁸	2.4
M. Schnell^[45], 2013	N/A	5×10⁷	3
Y. Ho^[46], 2013	N/A	2.2×10⁸	3.3
J. Wenz^[47], 2015	2×10²² ph·(0.1%bw)⁻¹·sr⁻¹	5×10⁷	5.2
J. M. Cole^[48], 2015	1.1×10²¹ ph·(0.1%bw)⁻¹·sr⁻¹	1.3×10⁹	33
K. Huang^[49], 2016	N/A	8×10⁸	75
A. Dopp^[50], 2018	1.6×10⁹ ph·msr⁻¹·s⁻¹	1×10⁸	N/A
J. Feng^[36], 2019	1.8 ×10²⁰ ph·msr⁻¹·s⁻¹	7 × 10⁷	N/A
Y. F. Li^[29], 2020	N/A	10¹³ ph·sr⁻¹	N/A
X. F. Shen^[31], 2021	3.3×10²⁰ ph·msr⁻¹·s⁻¹	7×10¹¹	5

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