Photopumping of XUV lasers by XFEL radiation
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TLDR
In this paper, the authors present simulations taking into account two different mechanisms generating the gain: (1) photoionization with subsequent three-body recombination, which takes advantage of the monochromaticity of the pump radiation to generate very cold electrons; (2) inner-shell ionization in which transient inversion is obtained by generating a hole in an otherwise completely filled shell.Abstract:
Within the next few years X-ray free-electron lasers (XFELs) now under construction are expected to generate highly collimated XUV pulses with 1013 photons and a duration of 100 fs. Focusing this radiation to a spot some 10 μm in diameter generates intensities of up to 1016 W/cm2. Such pump intensities make feasible the investigation of photopumped XUV lasers using this radiation. We present simulations taking into account two different mechanisms generating the gain: (1) photoionization with subsequent three-body recombination, which takes advantage of the monochromaticity of the pump radiation to generate very cold electrons; (2) inner-shell ionization in which transient inversion is obtained by generating a hole in an otherwise completely filled shell. The simulations show that under appropriate conditions both mechanisms generate very high gain. However, a number of further issues must be considered, such as the propagation of the pump pulse in the medium to be pumped.read more
Citations
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Journal ArticleDOI
Atomic inner-shell X-ray laser at 1.46 nanometres pumped by an X-ray free-electron laser
Nina Rohringer,Duncan P. Ryan,Richard A. London,Michael Purvis,Felicie Albert,James Dunn,John D. Bozek,Christoph Bostedt,Alexander Graf,Randal M. Hill,Stefan P. Hau-Riege,Jorge J. Rocca +11 more
TL;DR: The implementation of an X-ray laser in the kiloelectronvolt energy regime, based on atomic population inversion and driven by rapid K-shell photo-ionization using pulses from anX-ray free-electron laser is described, which provides greatly increased wavelength stability, monochromaticity and improved temporal coherence by comparison with present-day X- Ray free-Electron lasers.
Journal ArticleDOI
Atomic inner-shell x-ray laser pumped by an x-ray free-electron laser
Nina Rohringer,Richard A. London +1 more
TL;DR: In this paper, the authors discuss possibilities of pumping an atomic inner-shell x-ray laser with an X-ray free-electron laser (XFEL) and show that with the first available XFEL, the Linac Coherent Light Source at Stanford, it will become possible to produce sub-femtosecond xray pulses at intensities reaching $6.
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Core holes, charge disorder, and transition from metallic to plasma properties in ultrashort pulse irradiation of metals
TL;DR: In this article, the transition from metal to plasma usually occurs via an intermediate stage of a charge-disordered solid (solid plasma), in which ions are at their lattice sites but the ionization stages of individual ions differ due to ionization from localized bound states.
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Free electron laser high gain devices
TL;DR: In this paper, the authors discuss the relevant physical aspects and derive simple relations for laser and higher order harmonic power, which can be usefully exploited in the preliminary design of these sources.
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X-ray lasers from Inner-shell transitions pumped by the Free-electron laser
TL;DR: By the Carbon ISXRL scheme, the multi-spiky SASE FEL x-ray pulse with chaotic temporal structure is smoothed to a temporally continuous x-Ray pulse with a comparable duration but at a different wavelength.
References
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