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- Title
Highly coherent and stable pulses from the FERMI seeded free-electron laser in the extreme ultraviolet.
- Authors
Allaria, E.; Appio, R.; Badano, L.; Barletta, W.A.; Bassanese, S.; Biedron, S.G.; Borga, A.; Busetto, E.; Castronovo, D.; Cinquegrana, P.; Cleva, S.; Cocco, D.; Cornacchia, M.; Craievich, P.; Cudin, I.; D'Auria, G.; Dal Forno, M.; Danailov, M.B.; De Monte, R.; De Ninno, G.
- Abstract
Free-electron lasers (FELs) are promising devices for generating light with laser-like properties in the extreme ultraviolet and X-ray spectral regions. Recently, FELs based on the self-amplified spontaneous emission (SASE) mechanism have allowed major breakthroughs in diffraction and spectroscopy applications, despite the relatively large shot-to-shot intensity and photon-energy fluctuations and the limited longitudinal coherence inherent in the SASE mechanism. Here, we report results on the initial performance of the FERMI seeded FEL, based on the high-gain harmonic generation configuration, in which an external laser is used to initiate the emission process. Emission from the FERMI FEL-1 source occurs in the form of pulses carrying energy of several tens of microjoules per pulse and tunable throughout the 65 to 20 nm wavelength range, with unprecedented shot-to-shot wavelength stability, low-intensity fluctuations, close to transform-limited bandwidth, transverse and longitudinal coherence and full control of polarization.
- Subjects
FREE electron lasers; X-ray spectroscopy; X-ray diffraction; OPTICAL polarization; WAVELENGTHS; FLUCTUATIONS (Physics); LONGITUDINAL method
- Publication
Nature Photonics, 2012, Vol 6, Issue 10, p699
- ISSN
1749-4885
- Publication type
Article
- DOI
10.1038/nphoton.2012.233