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Relativistic electron acceleration by surface plasma waves excited with high intensity laser pulses

High Power Laser Science and Engineering 2020年第2期8卷 40-49页

作者： X.m.Zhu R.Prasad m.swantusch B.Aur A.A.Andreev O.Willi m.Cerchez Institut fur Laser und Plasmaphysik Heinrich-Heine-Universität DüsseldorfUniversitätsstr.1Düusseldorf40225Germany National Astronomical Observatories/Nanjing Institute of Astronomical Optics and Technology Chinese Academy of SciencesNanjing 210042China CAS Key Laboratory of Astronomical Optics and Technology Nanjing Institute of Astronomical Optics and TechnologyNanjing 210042China Saint Petersburg State University 7-9 Universitetskaya Nab.Saint Petersburg199034Russia ELI-ALPS Dugonics ter.13H 6722SzegedHungary

The process of high energy electron acceleration along the surface of grating targets(GTs)that were irradiated by a relativistic,high-contrast laser pulse at an intensity I=2.5×10^20 W/cm^2 was *** experimental results demonstrate that for a GT with a periodicity twice the laser wavelength,the surface electron flux is more intense for a laser incidence angle that is larger compared to the resonance angle predicted by the linear *** electron beam with a peak charge of∼2.7 nC/sr,for electrons with energies>1.5 meV,was *** simulations carried out with parameters similar to the experimental conditions also show an enhanced electron flux at higher incidence angles depending on the preplasma scale length.A theoretical model that includes ponderomotive effects with more realistic initial preplasma conditions suggests that the laser-driven intensity and preformed plasma scale length are important for the acceleration *** predictions closely match the experimental and computational results.

关键词： laser-driven electron sources relativistic plasmas structured targets surface electrons

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ARCTURUS laser: a versatile high-contrast,high-power multi-beam laser system

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High Power Laser Science and Engineering 2019年第3期7卷 1-11页

作者： m.Cerchez R.Prasad B.Aurand A.L.Giesecke S.Spickermann S.Brauckmann E.Aktan m.swantusch m.Toncian T.Toncian O.Willi Institut für Laser und Plasmaphysik Heinrich-Heine-Universitat Dusseldorf40225 DusseldorfGermany Helmholtz-Zentrum Dresden-Rossendorf 01328 DresdenGermany

With the latest configuration,the Ti:Sa laser system ARCTURUS(Düsseldorf University,Germany)operates with a double-chirped pulse amplification(CPA)architecture delivering pulses with an energy of 7 J before compression in each of the two high-power *** the implementation of a plasma mirror system,the intrinsic laser contrast is enhanced up to 10^-12 on a time scale of hundreds of picoseconds,before the main *** laser system has been used in various configurations for advanced experiments and different studies have been carried out employing the high-power laser beams as a single,high-intensity interaction beam(I≈1020 W/cm^2),in dual-and multi-beam configurations or in a pump–probe arrangement.

关键词： Ti:Sa lasers multi-beam configuration high power laser pulses relativistic plasmas laser driven particle and radiation.sources

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