Home > Publications database > Two-Color Operation of a Soft X-ray FEL with Alternation of Undulator Tunes > print

001     585184
005     20250715180037.0
024 7 _ |a 10.3390/app13010067
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024 7 _ |a arXiv:2211.07426
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100 1 _ |a Schneidmiller, Evgeny Alexanrdovich
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245 _ _ |a Two-Color Operation of a Soft X-ray FEL with Alternation of Undulator Tunes
260 _ _ |a Basel
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520 _ _ |a 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.
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650 _ 7 |a free-electron lasers
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650 _ 7 |a SASE
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650 _ 7 |a two-color operation
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650 _ 7 |a photon diagnostics
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693 _ _ |a FLASH
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693 _ _ |a FLASH2
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700 1 _ |a Bermudez Macias, Ivette J.
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700 1 _ |a Beye, Martin
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700 1 _ |a Braune, Markus
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700 1 _ |a Czwalinna, Marie Kristin
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700 1 _ |a Düsterer, Stefan
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700 1 _ |a Faatz, Bart
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700 1 _ |a Ivanov, Rosen
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700 1 _ |a Jastrow, Ulf Fini
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700 1 _ |a Kuhlmann, Marion
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700 1 _ |a Rönsch-Schulenburg, Juliane
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700 1 _ |a Schreiber, Siegfried
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700 1 _ |a Sorokin, Andrey
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700 1 _ |a Tiedtke, Kai
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700 1 _ |a Yurkov, Mikhail
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700 1 _ |a Zemella, Johann
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770 _ _ |a New Frontiers of X-ray Free-Electron Lasers
773 _ _ |a 10.3390/app13010067
|g Vol. 13, no. 1, p. 67 -
|0 PERI:(DE-600)2704225-X
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|t Applied Sciences
|v 13
|y 2023
|x 2076-3417
787 0 _ |a Schneidmiller, E. A. et.al.
|d 2022
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|r DESY-22-180 ; arXiv:2211.07426
|t Two-color operation of a soft x-ray FEL with alternation of undulator tunes
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