Bunching enhancement for coherent harmonic generation by using phase merging effects

Feng Ke; Jiang Kangnan; Hu Runshu; Luan Shixia; Wang Wentao; Li Ruxin

doi:10.1063/5.0191508

Volume 9 Issue 5

Sep. 2024

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Article Navigation > Matter and Radiation at Extremes > 2024 > 9(5): 057201

Feng Ke, Jiang Kangnan, Hu Runshu, Luan Shixia, Wang Wentao, Li Ruxin. Bunching enhancement for coherent harmonic generation by using phase merging effects[J]. Matter and Radiation at Extremes, 2024, 9(5): 057201. doi: 10.1063/5.0191508

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Feng Ke, Jiang Kangnan, Hu Runshu, Luan Shixia, Wang Wentao, Li Ruxin. Bunching enhancement for coherent harmonic generation by using phase merging effects[J]. Matter and Radiation at Extremes, 2024, 9(5): 057201. doi: 10.1063/5.0191508

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Bunching enhancement for coherent harmonic generation by using phase merging effects

doi: 10.1063/5.0191508

Feng Ke^{1
,
,
,},
Jiang Kangnan^{1, 2
,},
Hu Runshu^{1, 3},
Luan Shixia^1
,,
Wang Wentao^{1
,
,
,},
Li Ruxin^{1, 2}

1.
State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai, People’s Republic of China
2.
School of Physical Science and Technology, ShanghaiTech University, Shanghai, People’s Republic of China
3.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, People’s Republic of China

More Information

Corresponding author: a)Authors to whom correspondence should be addressed: fengke@siom.ac.cn and wwt1980@siom.ac.cn
Received Date: 2023-12-14
Accepted Date: 2024-05-31

Available Online: 2024-09-01

Publish Date: 2024-09-01

Abstract

Abstract

In this paper, promising but simple schemes are investigated to enhance the micro-bunching of relativistic electron beams for coherent harmonic generation (CHG) by using phase merging effects. In contrast to the standard CHG scheme, two specially designed dispersion sections (DSs) are adopted with the DS-modulator–DS configuration. The phase space of the e beam is appropriately coupled in the first DS, and the electrons within one seed wavelength can merge to the same phase with a matched second DS. Micro-bunching of the e beam can thus be enhanced by a large margin with much higher-harmonic components. Taking e beams from laser wakefield accelerators (LWFAs) as an example, start-to-end simulations are performed to show the effectiveness and robustness of the proposed schemes with several configurations. The beam current can be optimized to several tens to hundreds of kiloamperes, and the radiation power reaches hundreds of megawatts in the extreme ultraviolet regime within a 3.5 m-long beamline. The proposed schemes offer new opportunities for future compact free-electron lasers driven by LWFAs and provides prospects for truly compact and widely applicable systems.

The authors have no conflicts to disclose.
Conflict of Interest
Author Contributions
Ke Feng: Conceptualization (lead); Data curation (lead); Formal analysis (lead); Investigation (lead); Methodology (lead); Visualization (lead); Writing – original draft (lead); Writing – review & editing (equal). Kangnan Jiang: Conceptualization (equal); Formal analysis (equal). Runshu Hu: Conceptualization (equal); Methodology (equal). Shixia Luan: Conceptualization (equal). Wentao Wang: Formal analysis (equal); Supervision (equal); Writing – review & editing (equal). Ruxin Li: Supervision (equal).
The data that support the findings of this study are available from the corresponding authors upon reasonable request.

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References(68)

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