首页|Bunching enhancement for coherent harmonic generation by using phase merging effects

Bunching enhancement for coherent harmonic generation by using phase merging effects

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In this paper,promising but simple schemes are investigated to enhance the micro-bunching of relativistic electron beams for coherent har-monic 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 exam-ple,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.

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

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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

School of Physical Science and Technology,ShanghaiTech University,Shanghai,People's Republic of China

Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing,People's Republic of China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaCAS Project for Young Scientists in Basic ResearchProgram of Shanghai Academic Research LeaderState Key Laboratory Program of the Chinese Ministry of Science and Technology and CAS Youth Innovation Promotion AssociatioState Key Laboratory Program of the Chinese Ministry of Science and Technology and CAS Youth Innovation Promotion Associatio

1238810212225411121053531199107212174410YSBR06022XD1424200Y2019522022242

2024

10.1063/5.0191508

极端条件下的物质与辐射(英文)
中国工程物理研究院科技信息中心

极端条件下的物质与辐射(英文)

ISSN：2468-2047
年,卷(期)：2024.9(5)