Two-Color Operation of a Soft X-ray FEL with Alternation of Undulator Tunes
FLASH is the first soft X-ray FEL user facility, routinely providing brilliant photon beams for users since 2005. The second undulator branch of this facility, FLASH2, is gap-tunable, which allows for testing and using advanced lasing concepts. In particular, we developed a two-color operation mode...
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MDPI AG
2022-12-01
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| author | Evgeny Schneidmiller Ivette J. Bermudez Macias Martin Beye Markus Braune Marie Kristin Czwalinna Stefan Düsterer Bart Faatz Rosen Ivanov Ulf Fini Jastrow Marion Kuhlmann Juliane Rönsch-Schulenburg Siegfried Schreiber Andrey Sorokin Kai Tiedtke Mikhail Yurkov Johann Zemella |
| author_facet | Evgeny Schneidmiller Ivette J. Bermudez Macias Martin Beye Markus Braune Marie Kristin Czwalinna Stefan Düsterer Bart Faatz Rosen Ivanov Ulf Fini Jastrow Marion Kuhlmann Juliane Rönsch-Schulenburg Siegfried Schreiber Andrey Sorokin Kai Tiedtke Mikhail Yurkov Johann Zemella |
| author_sort | Evgeny Schneidmiller |
| collection | DOAJ |
| description | FLASH is the first soft X-ray FEL user facility, routinely providing brilliant photon beams for users since 2005. The second undulator branch of this facility, FLASH2, is gap-tunable, which allows for testing and using advanced lasing concepts. In particular, we developed a two-color operation mode based on the alternatingly tuned undulator segments (every other segment is tuned to the second wavelength). This scheme is advantageous in comparison with a subsequent generation of two colors in two consecutive sections of the undulator line. First, source positions of the two FEL beams are close to each other which makes it easier to focus them on a sample. Second, the amplification is more efficient in this configuration since the segments with respectively “wrong” wavelength still act as bunchers. We studied operation of this scheme in the regime of small and large separation of tunes (up to a factor of two). We developed new methods for online intensity measurements of the two colors simultaneously that require a combination of two detectors. We also demonstrated our capabilities to measure spectral and temporal properties of two pulses with different wavelengths. |
| first_indexed | 2024-03-11T10:08:42Z |
| format | Article |
| id | doaj.art-3b71b15f300548d8952583e1ce90c209 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T10:08:42Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-3b71b15f300548d8952583e1ce90c2092023-11-16T14:50:11ZengMDPI AGApplied Sciences2076-34172022-12-011316710.3390/app13010067Two-Color Operation of a Soft X-ray FEL with Alternation of Undulator TunesEvgeny Schneidmiller0Ivette J. Bermudez Macias1Martin Beye2Markus Braune3Marie Kristin Czwalinna4Stefan Düsterer5Bart Faatz6Rosen Ivanov7Ulf Fini Jastrow8Marion Kuhlmann9Juliane Rönsch-Schulenburg10Siegfried Schreiber11Andrey Sorokin12Kai Tiedtke13Mikhail Yurkov14Johann Zemella15Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyShanghai Advanced Research Institute, Chinese Academy of Sciences, Haike Road 99, Shanghai 201210, ChinaDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyDeutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, GermanyFLASH is the first soft X-ray FEL user facility, routinely providing brilliant photon beams for users since 2005. The second undulator branch of this facility, FLASH2, is gap-tunable, which allows for testing and using advanced lasing concepts. In particular, we developed a two-color operation mode based on the alternatingly tuned undulator segments (every other segment is tuned to the second wavelength). This scheme is advantageous in comparison with a subsequent generation of two colors in two consecutive sections of the undulator line. First, source positions of the two FEL beams are close to each other which makes it easier to focus them on a sample. Second, the amplification is more efficient in this configuration since the segments with respectively “wrong” wavelength still act as bunchers. We studied operation of this scheme in the regime of small and large separation of tunes (up to a factor of two). We developed new methods for online intensity measurements of the two colors simultaneously that require a combination of two detectors. We also demonstrated our capabilities to measure spectral and temporal properties of two pulses with different wavelengths.https://www.mdpi.com/2076-3417/13/1/67free-electron lasersSASEtwo-color operationphoton diagnostics |
| spellingShingle | Evgeny Schneidmiller Ivette J. Bermudez Macias Martin Beye Markus Braune Marie Kristin Czwalinna Stefan Düsterer Bart Faatz Rosen Ivanov Ulf Fini Jastrow Marion Kuhlmann Juliane Rönsch-Schulenburg Siegfried Schreiber Andrey Sorokin Kai Tiedtke Mikhail Yurkov Johann Zemella Two-Color Operation of a Soft X-ray FEL with Alternation of Undulator Tunes Applied Sciences free-electron lasers SASE two-color operation photon diagnostics |
| title | Two-Color Operation of a Soft X-ray FEL with Alternation of Undulator Tunes |
| title_full | Two-Color Operation of a Soft X-ray FEL with Alternation of Undulator Tunes |
| title_fullStr | Two-Color Operation of a Soft X-ray FEL with Alternation of Undulator Tunes |
| title_full_unstemmed | Two-Color Operation of a Soft X-ray FEL with Alternation of Undulator Tunes |
| title_short | Two-Color Operation of a Soft X-ray FEL with Alternation of Undulator Tunes |
| title_sort | two color operation of a soft x ray fel with alternation of undulator tunes |
| topic | free-electron lasers SASE two-color operation photon diagnostics |
| url | https://www.mdpi.com/2076-3417/13/1/67 |
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