Coherent extreme ultraviolet free-electron laser with echo-enabled harmonic generation
| Autor: | Zenggong Jiang, Zhen Wang, Yongbin Leng, Kaishang Zhou, Taihe Lan, Qiang Gu, Dao Xiang, Wenyan Zhang, L. Q. Yin, Si Chen, Zhentang Zhao, Bo Liu, Tao Liu, Xingtao Wang, Haixiao Deng, Duan Gu, Lie Feng, B.Y. Wang, Xuan Li, Dong Wang, Guanglei Wang, Meng Zhang, Chao Feng |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Nuclear and High Energy Physics Physics and Astronomy (miscellaneous) 010308 nuclear & particles physics business.industry Extreme ultraviolet lithography Free-electron laser Surfaces and Interfaces Radiation Laser 01 natural sciences law.invention Optics law Harmonics Extreme ultraviolet 0103 physical sciences High harmonic generation Physics::Accelerator Physics lcsh:QC770-798 lcsh:Nuclear and particle physics. Atomic energy. Radioactivity 010306 general physics business Lasing threshold |
| Zdroj: | Physical Review Accelerators and Beams, Vol 22, Iss 5, p 050703 (2019) |
| ISSN: | 2469-9888 |
| Popis: | The echo-enabled harmonic generation (EEHG) scheme holds promising prospects for efficiently generating intense coherent radiation at very high harmonics of a conventional ultraviolet seed laser. We report the lasing of the EEHG free-electron laser (FEL) at an extreme ultraviolet (EUV) wavelength with a seeded FEL facility, the Shanghai soft x-ray FEL. For the first time, we have benchmarked the basic theory of EEHG by measuring the bunching factor distributions over one octave down to the EUV region. Our results demonstrated the key advantages of the EEHG FEL, i.e., generation of very high harmonics with a small laser-induced energy spread and insensitivity to beam imperfections, and marks a great step towards fully coherent x rays with the EEHG scheme. |
| Databáze: | OpenAIRE |
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