Extending the Photon Energy Coverage of a Seeded Free-Electron Laser via Reverse Taper Enhanced Harmonic Cascade
External seeded free-electron lasers (FELs) hold promising prospects for producing intense coherent radiation at high harmonics of a conventional laser. The practical harmonic up-conversion efficiencies of current seeding techniques are limited by various three-dimensional effects on the electron be...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/8/2/44 |
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| author | Kaiqing Zhang Tao Liu Zheng Qi Xiaoxi Fu Chao Feng Haixiao Deng Bo Liu |
| author_facet | Kaiqing Zhang Tao Liu Zheng Qi Xiaoxi Fu Chao Feng Haixiao Deng Bo Liu |
| author_sort | Kaiqing Zhang |
| collection | DOAJ |
| description | External seeded free-electron lasers (FELs) hold promising prospects for producing intense coherent radiation at high harmonics of a conventional laser. The practical harmonic up-conversion efficiencies of current seeding techniques are limited by various three-dimensional effects on the electron beam. In this paper, a novel method is proposed to extend the wavelength coverage of a seeded FEL by combining the reverse taper undulator with the echo-enabled harmonic generation. The proposed technique can significantly enhance the bunching at ultra-high harmonics and preserve the electron beam qualities from degradation by deleterious effects. Theoretical analysis and numerical simulation are performed, and the results demonstrate that stable, intense, nearly fully coherent FEL pulses with photon energy up to 1 keV can be generated. The proposed technique may open up new opportunities to obtain laser-like pulses at sub-nanometer wavelength. |
| first_indexed | 2024-03-09T04:56:17Z |
| format | Article |
| id | doaj.art-89197cbfb1c94544ad3c1e50f1d79376 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-09T04:56:17Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-89197cbfb1c94544ad3c1e50f1d793762023-12-03T13:05:02ZengMDPI AGPhotonics2304-67322021-02-01824410.3390/photonics8020044Extending the Photon Energy Coverage of a Seeded Free-Electron Laser via Reverse Taper Enhanced Harmonic CascadeKaiqing Zhang0Tao Liu1Zheng Qi2Xiaoxi Fu3Chao Feng4Haixiao Deng5Bo Liu6Shanghai Advanced Research Institution, Chinese Academy of Sciences, Shanghai 201210, ChinaShanghai Advanced Research Institution, Chinese Academy of Sciences, Shanghai 201210, ChinaShanghai Advanced Research Institution, Chinese Academy of Sciences, Shanghai 201210, ChinaShanghai Advanced Research Institution, Chinese Academy of Sciences, Shanghai 201210, ChinaShanghai Advanced Research Institution, Chinese Academy of Sciences, Shanghai 201210, ChinaShanghai Advanced Research Institution, Chinese Academy of Sciences, Shanghai 201210, ChinaShanghai Advanced Research Institution, Chinese Academy of Sciences, Shanghai 201210, ChinaExternal seeded free-electron lasers (FELs) hold promising prospects for producing intense coherent radiation at high harmonics of a conventional laser. The practical harmonic up-conversion efficiencies of current seeding techniques are limited by various three-dimensional effects on the electron beam. In this paper, a novel method is proposed to extend the wavelength coverage of a seeded FEL by combining the reverse taper undulator with the echo-enabled harmonic generation. The proposed technique can significantly enhance the bunching at ultra-high harmonics and preserve the electron beam qualities from degradation by deleterious effects. Theoretical analysis and numerical simulation are performed, and the results demonstrate that stable, intense, nearly fully coherent FEL pulses with photon energy up to 1 keV can be generated. The proposed technique may open up new opportunities to obtain laser-like pulses at sub-nanometer wavelength.https://www.mdpi.com/2304-6732/8/2/44free electron laserreverse taperseeded FELintra beam scattingsynchrotron radiation effects |
| spellingShingle | Kaiqing Zhang Tao Liu Zheng Qi Xiaoxi Fu Chao Feng Haixiao Deng Bo Liu Extending the Photon Energy Coverage of a Seeded Free-Electron Laser via Reverse Taper Enhanced Harmonic Cascade Photonics free electron laser reverse taper seeded FEL intra beam scatting synchrotron radiation effects |
| title | Extending the Photon Energy Coverage of a Seeded Free-Electron Laser via Reverse Taper Enhanced Harmonic Cascade |
| title_full | Extending the Photon Energy Coverage of a Seeded Free-Electron Laser via Reverse Taper Enhanced Harmonic Cascade |
| title_fullStr | Extending the Photon Energy Coverage of a Seeded Free-Electron Laser via Reverse Taper Enhanced Harmonic Cascade |
| title_full_unstemmed | Extending the Photon Energy Coverage of a Seeded Free-Electron Laser via Reverse Taper Enhanced Harmonic Cascade |
| title_short | Extending the Photon Energy Coverage of a Seeded Free-Electron Laser via Reverse Taper Enhanced Harmonic Cascade |
| title_sort | extending the photon energy coverage of a seeded free electron laser via reverse taper enhanced harmonic cascade |
| topic | free electron laser reverse taper seeded FEL intra beam scatting synchrotron radiation effects |
| url | https://www.mdpi.com/2304-6732/8/2/44 |
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