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Your search keyword '"XUV pulses"' showing total 2 results
Start Over Descriptor "XUV pulses" Topic extreme ultraviolet
2 results on '"XUV pulses"'

1. Single-shot temporal characterization of XUV pulses with duration from ~10 fs to ~350 fs at FLASH

Author

Nikolay M. Kabachnik, Markus Drescher, Andrey K. Kazansky, I. P. Sazhina, Ulrike Frühling, G. Kurdi, Katharina Wenig, Jia Liu, Stefan Düsterer, Ivette J. Bermudez Macias, Juliane Roensch-Schulenburg, Günter Brenner, R. Ivanov, Sophie Walther, and Anastasios Dimitriou

Subjects
Physics, business.industry, temporal diagnostic, Single shot, XUV pulses, FLASH, x-ray pulses, Condensed Matter Physics, THz streaking, field, Atomic and Molecular Physics, and Optics, Characterization (materials science), operation, Flash (photography), Optics, single cycle terahertz pulse, SASE FEL, free-electron laser, Duration (music), Extreme ultraviolet, ddc:530, streaking, business, performance
Abstract

Journal of physics / B 53(18), 184004 (2020). doi:10.1088/1361-6455/ab9c38, Ultra-short extreme ultraviolet pulses from the free-electron laser FLASH are characterized using terahertz-field driven streaking. Measurements at different ultra-short extreme ultraviolet wavelengths and pulse durations as well as numerical simulations were performed to explore the application range and accuracy of the method. For the simulation of streaking, a standard classical approach is used which is compared to quantum mechanical theory, based on strong field approximation. Various factors limiting the temporal resolution of the presented terahertz streaking setup are investigated and discussed. Special attention is paid to the cases of very short (∼10 fs) and long (up to∼350 fs) pulses., Published by IOP Publ., Bristol

Published
2020

2. Extreme Ultraviolet Beam Enhancement by Relativistic Surface Plasmons

Author

L. Chopineau, F. Réau, Andrea Sgattoni, Andrea Macchi, T. Ceccotti, Luca Fedeli, A. Denoeud, G. Cantono, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11), Laboratoire pour l'utilisation des lasers intenses (LULI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], High intensity laser-plasma interaction, General Physics and Astronomy, Physics::Optics, Grating, 01 natural sciences, 010305 fluids & plasmas, law.invention, Physics and Astronomy (all), Optics, law, 0103 physical sciences, High harmonic generation, 010306 general physics, surface plasmons, high field plasmonics, high harmonics, XUV pulses, ultrashort radiation pulses, Particle-In-Cell simulations, business.industry, Surface plasmon, Laser, High order harmonic generation, Harmonics, Extreme ultraviolet, Harmonic, Laser-driven electron acceleration, business, Beam (structure)
Abstract

International audience; The emission of high-order harmonics in the extreme ultraviolet range from the interaction of a short, intense laser pulse with a grating target is investigated experimentally. When resonantly exciting a surface plasmon, both the intensity and the highest order observed for the harmonic emission along the grating surface increase with respect to a flat target. Harmonics are obtained when a suitable density gradient is preformed at the target surface, demonstrating the possibility to manipulate the grating profile on a nanometric scale without preventing the surface plasmon excitation. In support of this, the harmonic emission is spatiotemporally correlated to the acceleration of multi-MeV electron bunches along the grating surface. Particle-in-cell simulations reproduce the experimental results and give insight on the mechanism of high harmonic generation in the presence of surface plasmons.

Published
2018

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