Minimum Spectral Bandwidth in Echo Seeded Free Electron Lasers
This paper examines the impact of non-linear longitudinal phase distortions on the spectral bandwidth in echo seeded free electron lasers (FELs). It extends the existing theory developed in Hemsing [1] for echo-enabled harmonic generation (EEHG) to include finite laser pulse durations. An analytic e...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2019-03-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fphy.2019.00035/full |
| _version_ | 1818550672709124096 |
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| author | Erik Hemsing |
| author_facet | Erik Hemsing |
| author_sort | Erik Hemsing |
| collection | DOAJ |
| description | This paper examines the impact of non-linear longitudinal phase distortions on the spectral bandwidth in echo seeded free electron lasers (FELs). It extends the existing theory developed in Hemsing [1] for echo-enabled harmonic generation (EEHG) to include finite laser pulse durations. An analytic expression for the shape of the optimized longitudinal bunching envelope is derived, and is used to determine the laser and electron beam pulse durations that minimize the seeded bandwidth in the presence of arbitrary phase distortions. The time-bandwidth product (TBP) is also derived, and is shown that the TBP and the bandwidth increase by no more than 2 from their transform-limited values when the bandwidth is minimized. |
| first_indexed | 2024-12-12T08:49:36Z |
| format | Article |
| id | doaj.art-6ff8231eae184826aeb4571bd806fe37 |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-12-12T08:49:36Z |
| publishDate | 2019-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-6ff8231eae184826aeb4571bd806fe372022-12-22T00:30:18ZengFrontiers Media S.A.Frontiers in Physics2296-424X2019-03-01710.3389/fphy.2019.00035428831Minimum Spectral Bandwidth in Echo Seeded Free Electron LasersErik HemsingThis paper examines the impact of non-linear longitudinal phase distortions on the spectral bandwidth in echo seeded free electron lasers (FELs). It extends the existing theory developed in Hemsing [1] for echo-enabled harmonic generation (EEHG) to include finite laser pulse durations. An analytic expression for the shape of the optimized longitudinal bunching envelope is derived, and is used to determine the laser and electron beam pulse durations that minimize the seeded bandwidth in the presence of arbitrary phase distortions. The time-bandwidth product (TBP) is also derived, and is shown that the TBP and the bandwidth increase by no more than 2 from their transform-limited values when the bandwidth is minimized.https://www.frontiersin.org/article/10.3389/fphy.2019.00035/fullFEL (free electron laser)EEHGechoseededxraychirp |
| spellingShingle | Erik Hemsing Minimum Spectral Bandwidth in Echo Seeded Free Electron Lasers Frontiers in Physics FEL (free electron laser) EEHG echo seeded xray chirp |
| title | Minimum Spectral Bandwidth in Echo Seeded Free Electron Lasers |
| title_full | Minimum Spectral Bandwidth in Echo Seeded Free Electron Lasers |
| title_fullStr | Minimum Spectral Bandwidth in Echo Seeded Free Electron Lasers |
| title_full_unstemmed | Minimum Spectral Bandwidth in Echo Seeded Free Electron Lasers |
| title_short | Minimum Spectral Bandwidth in Echo Seeded Free Electron Lasers |
| title_sort | minimum spectral bandwidth in echo seeded free electron lasers |
| topic | FEL (free electron laser) EEHG echo seeded xray chirp |
| url | https://www.frontiersin.org/article/10.3389/fphy.2019.00035/full |
| work_keys_str_mv | AT erikhemsing minimumspectralbandwidthinechoseededfreeelectronlasers |