Multi-stage harmonic cascade at seeded free-electron lasers
External seeded free-electron lasers (FELs) have exhibited substantial progress in diverse applications over the last decade. However, the frequency up-conversion efficiency in single-stage seeded FELs, particularly in high-gain harmonic generation (HGHG), remains constrained to a modest level. This...
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| Format: | Article |
| Language: | English |
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Cambridge University Press
2024-01-01
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| Series: | High Power Laser Science and Engineering |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S2095471924000768/type/journal_article |
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| _version_ | 1841526465665957888 |
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| author | Li Zeng Yong Yu Xiaofan Wang Qinming Li Jitao Sun Xinmeng Li Zhigang He Jiayue Yang Guorong Wu Weiqing Zhang Xueming Yang |
| author_facet | Li Zeng Yong Yu Xiaofan Wang Qinming Li Jitao Sun Xinmeng Li Zhigang He Jiayue Yang Guorong Wu Weiqing Zhang Xueming Yang |
| author_sort | Li Zeng |
| collection | DOAJ |
| description | External seeded free-electron lasers (FELs) have exhibited substantial progress in diverse applications over the last decade. However, the frequency up-conversion efficiency in single-stage seeded FELs, particularly in high-gain harmonic generation (HGHG), remains constrained to a modest level. This limitation restricts its capability to conduct experiments within the ‘water window’. This paper presents a novel method for generating coherent X-ray FEL pulses in the water window region based on the HGHG scheme with multi-stage harmonic cascade. Without any additional modifications to the HGHG configuration, simulation results demonstrate the generation of intense 3 nm coherent FEL radiation using an external ultraviolet seed laser. This indicates an increase of the harmonic conversion number to approximately 90. A preliminary experiment is performed to evaluate the feasibility of this method. The proposed approach could potentially serve as an efficient method to broaden the wavelength coverage accessible to both existing and planned seeded X-ray FEL facilities. |
| format | Article |
| id | doaj-art-f1540abe77574165ae347827dc5b91a6 |
| institution | Kabale University |
| issn | 2095-4719 2052-3289 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | High Power Laser Science and Engineering |
| spelling | doaj-art-f1540abe77574165ae347827dc5b91a62025-01-16T21:52:49ZengCambridge University PressHigh Power Laser Science and Engineering2095-47192052-32892024-01-011210.1017/hpl.2024.76Multi-stage harmonic cascade at seeded free-electron lasersLi Zeng0https://orcid.org/0009-0005-0024-849XYong Yu1https://orcid.org/0009-0004-3061-9207Xiaofan Wang2https://orcid.org/0000-0002-2670-5119Qinming Li3Jitao Sun4Xinmeng Li5Zhigang He6Jiayue Yang7Guorong Wu8Weiqing Zhang9Xueming Yang10Institute of Advanced Science Facilities, Shenzhen, ChinaInstitute of Advanced Science Facilities, Shenzhen, ChinaInstitute of Advanced Science Facilities, Shenzhen, ChinaInstitute of Advanced Science Facilities, Shenzhen, ChinaDalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China University of Chinese Academy of Sciences, Beijing, ChinaDalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China University of Chinese Academy of Sciences, Beijing, ChinaDalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, ChinaDalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, ChinaDalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, ChinaDalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, ChinaInstitute of Advanced Science Facilities, Shenzhen, China Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China College of Science, Southern University of Science and Technology, Shenzhen, ChinaExternal seeded free-electron lasers (FELs) have exhibited substantial progress in diverse applications over the last decade. However, the frequency up-conversion efficiency in single-stage seeded FELs, particularly in high-gain harmonic generation (HGHG), remains constrained to a modest level. This limitation restricts its capability to conduct experiments within the ‘water window’. This paper presents a novel method for generating coherent X-ray FEL pulses in the water window region based on the HGHG scheme with multi-stage harmonic cascade. Without any additional modifications to the HGHG configuration, simulation results demonstrate the generation of intense 3 nm coherent FEL radiation using an external ultraviolet seed laser. This indicates an increase of the harmonic conversion number to approximately 90. A preliminary experiment is performed to evaluate the feasibility of this method. The proposed approach could potentially serve as an efficient method to broaden the wavelength coverage accessible to both existing and planned seeded X-ray FEL facilities.https://www.cambridge.org/core/product/identifier/S2095471924000768/type/journal_articlefree-electron laserharmonic lasinghigh-gain harmonic generationwater window |
| spellingShingle | Li Zeng Yong Yu Xiaofan Wang Qinming Li Jitao Sun Xinmeng Li Zhigang He Jiayue Yang Guorong Wu Weiqing Zhang Xueming Yang Multi-stage harmonic cascade at seeded free-electron lasers High Power Laser Science and Engineering free-electron laser harmonic lasing high-gain harmonic generation water window |
| title | Multi-stage harmonic cascade at seeded free-electron lasers |
| title_full | Multi-stage harmonic cascade at seeded free-electron lasers |
| title_fullStr | Multi-stage harmonic cascade at seeded free-electron lasers |
| title_full_unstemmed | Multi-stage harmonic cascade at seeded free-electron lasers |
| title_short | Multi-stage harmonic cascade at seeded free-electron lasers |
| title_sort | multi stage harmonic cascade at seeded free electron lasers |
| topic | free-electron laser harmonic lasing high-gain harmonic generation water window |
| url | https://www.cambridge.org/core/product/identifier/S2095471924000768/type/journal_article |
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