1. Generation and measurement of intense few-femtosecond superradiant extreme-ultraviolet free-electron laser pulsesNajmeh S. Mirian, Michele Di Fraia, Simone Spampinati, Filippo Sottocorona, Enrico Allaria, Laura Badano, Miltcho Bojanov Danailov, Alexander Demidovich, Giovanni De Ninno, Primož Rebernik Ribič, 2021, izvirni znanstveni članek Ključne besede: free electron laser, superradiance, femtosecond
Objavljeno v RUNG: 03.01.2022; Ogledov: 2677; Prenosov: 0
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2. Chirped pulse amplification in an extreme-ultraviolet free-electron laserDavid Gauthier, Enrico Allaria, Marcello Coreno, Ivan Cudin, Hugo Dacasa, Miltcho Bojanov Danailov, Alexander Demidovich, S. Di Mitri, B. Diviacco, Eugenio Ferrari, Primož Rebernik Ribič, Giovanni De Ninno, 2016, izvirni znanstveni članek Ključne besede: free-electron lasers, chirped pulse amplification, femtosecond
Objavljeno v RUNG: 13.01.2020; Ogledov: 4261; Prenosov: 14
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3. Shortening the pulse duration in seeded free-electron lasers by chirped microbunchingPrimož Rebernik Ribič, Takashi Tanaka, 2019, izvirni znanstveni članek Opis: In externally seeded free-electron lasers (FELs) that rely on a frequency upconversion scheme to generate intense short-wavelength light pulses, the slippage effect in the radiator imposes a lower limit on the FEL pulse duration, which is typically on the order of a few tens of femtoseconds. Recently it was proposed that a combination of a chirped microbunch and a tapered undulator can be used to break this limit. Although the method has the potential to reduce the FEL pulse duration down to a level that cannot be achieved by current state-of-the-art technology, it requires a very short seed pulse (∼
one optical cycle or less), making it challenging to put this concept into practical use. Here, we propose an alternative technique to relax the requirement on the seed pulse length. We show that the modified scheme allows generation of FEL pulses with durations much shorter than that determined by the seed pulse and the slippage effect. The performance of the method, which can easily be implemented at existing seeded FEL user facilities, is evaluated through a campaign of analytical calculations and simulations. For our set of typical seeded FEL parameters, we expect the generation of 1.6 fs long pulses at 26 nm with a peak power of 10 GW using a 20 fs long chirped seed pulse operating at 260 nm.
Ključne besede: free-electron lasers, short pulses, femtosecond
Objavljeno v RUNG: 12.01.2020; Ogledov: 3655; Prenosov: 0
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