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Title:Coherent soft X-ray pulses from an echo-enabled harmonic generation free-electron laser
Authors:ID Rebernik Ribič, Primož, Elettra Sincrotrone Trieste, Univerza v Novi Gorici (Author)
ID De Ninno, Giovanni, Elettra Sincrotrone Trieste, Univerza v Novi Gorici (Author), et al.
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Language:English
Work type:Not categorized
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:X-ray free-electron lasers (FELs), which amplify light emitted by a relativistic electron beam, are extending nonlinear optical techniques to shorter wavelengths, adding element specificity by exciting and probing electronic transitions from core levels. These techniques would benefit tremendously from having a stable FEL source, generating spectrally pure and wavelength-tunable pulses. We show that such requirements can be met by operating the FEL in the so-called echo-enabled harmonic generation (EEHG) configuration. Here, two external conventional lasers are used to precisely tailor the longitudinal phase space of the electron beam before emission of X-rays. We demonstrate high-gain EEHG lasing producing stable, intense, nearly fully coherent pulses at wavelengths as short as 5.9 nm (~211 eV) at the FERMI FEL user facility. Low sensitivity to electron-beam imperfections and observation of stable, narrow-band, coherent emission down to 2.6 nm (~474 eV) make the technique a prime candidate for generating laser-like pulses in the X-ray spectral region, opening the door to multidimensional coherent spectroscopies at short wavelengths.
Keywords:free electron laser, coherence, x-rays
Year of publishing:2019
Number of pages:8
Numbering:0
PID:20.500.12556/RUNG-4793 New window
COBISS.SI-ID:5380859 New window
DOI:10.1038/s41566-019-0427-1 New window
NUK URN:URN:SI:UNG:REP:83ZLUN1C
Publication date in RUNG:07.05.2019
Views:5201
Downloads:0
Metadata:XML DC-XML DC-RDF
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REBERNIK RIBIČ, Primož and DE NINNO, Giovanni, 2019, Coherent soft X-ray pulses from an echo-enabled harmonic generation free-electron laser. Nature Photonics [online]. 2019. Vol. 0. [Accessed 7 April 2025]. DOI 10.1038/s41566-019-0427-1. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=4510
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Record is a part of a journal

Title:Nature Photonics
Publisher:Nature Research (part of Springer Nature)
Year of publishing:2019
ISSN:1749-4885

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