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  Control of the polarization of a vacuum-ultraviolet, high-gain, free-electron laser.

Allaria, E., Diviacco, B., Callegari, C., Finetti, P., Mahieu, B., Viefhaus, J., et al. (2014). Control of the polarization of a vacuum-ultraviolet, high-gain, free-electron laser. Physical Review X, 4(4): 041040. doi:10.1103/PhysRevX.4.041040.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-BB4C-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-BB4F-9
Genre: Journal Article

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 Creators:
Allaria, E., Author
Diviacco, B., Author
Callegari, C., Author
Finetti, P., Author
Mahieu, B., Author
Viefhaus, J., Author
Zangrando, M., Author
De Ninno, G. , Author
Lambert, G., Author
Ferrari, E., Author
Buck, J., Author
Ilchen, M., Author
Vodungbo, B., Author
Mahne, N., Author
Svetina, C., Author
Spezzani, C., Author
Di Mitri, S., Author
Penco, G., Author
Trovó, M., Author
Fawley, W. M., Author
Rebernik, P. R., AuthorGauthier, D., AuthorGrazioli, C., AuthorCoreno, M., AuthorRessel, B., AuthorKivimäki, A., AuthorMazza, T., AuthorGlaser, L.1, Author              Scholz, F., AuthorSeltmann, J., AuthorGessler, P., AuthorGrünert, J., AuthorDe Fanis, A., AuthorMeyer, M., AuthorKnie, A., AuthorMoeller, S. P., AuthorRaimondi, L., AuthorCapotondi, F., AuthorPedersoli, E., AuthorPlekan, O., AuthorDanailov, M. B., AuthorDemidovich, A., AuthorNikolov, I., AuthorAbrami, A., AuthorGautier, J., AuthorLüning, J., AuthorZeitoun, P., AuthorGiannessi, L., Author more..
Affiliations:
1Research Group of Structural Dynamics of (Bio)Chemical Systems, MPI for Biophysical Chemistry, Max Planck Society, ou_578564              

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 Abstract: The two single-pass, externally seeded free-electron lasers (FELs) of the FERMI user facility are designed around Apple-II-type undulators that can operate at arbitrary polarization in the vacuum ultraviolet-to-soft x-ray spectral range. Furthermore, within each FEL tuning range, any output wavelength and polarization can be set in less than a minute of routine operations. We report the first demonstration of the full output polarization capabilities of FERMI FEL-1 in a campaign of experiments where the wavelength and nominal polarization are set to a series of representative values, and the polarization of the emitted intense pulses is thoroughly characterized by three independent instruments and methods, expressly developed for the task. The measured radiation polarization is consistently >90% and is not significantly spoiled by the transport optics; differing, relative transport losses for horizontal and vertical polarization become more prominent at longer wavelengths and lead to a non-negligible ellipticity for an originally circularly polarized state. The results from the different polarimeter setups validate each other, allow a cross-calibration of the instruments, and constitute a benchmark for user experiments.

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Language(s): eng - English
 Dates: 2014-12-02
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevX.4.041040
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Title: Physical Review X
Source Genre: Journal
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Pages: 15 Volume / Issue: 4 (4) Sequence Number: 041040 Start / End Page: - Identifier: -