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Coherent soft X-ray...
Coherent soft X-ray pulses from an echo-enabled harmonic generation free-electron laser
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- Rebernik Ribič, P. (författare)
- University of Nova Gorica
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- Pop, Mihai (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,MAX IV Laboratory,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Allaria, E.M. (författare)
- Elettra Sincrotrone Trieste
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(creator_code:org_t)
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et al
- 2019-05-06
- 2019
- Engelska.
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Ingår i: Nature Photonics. - : Springer Science and Business Media LLC. - 1749-4885 .- 1749-4893. ; 13, s. 555-561
- Relaterad länk:
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Abstract
Ämnesord
Stäng
- 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. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- Electron beams
- Electron emission
- Free electron lasers
- Harmonic generation
- Phase space methods
- X rays
- Coherent spectroscopies
- Conventional lasers
- Electronic transition
- Element specificity
- Harmonic generation free electron lasers
- Nonlinear optical technique
- Relativistic electron beam
- X-ray free electron lasers
- Electrons
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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