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Electron kinetics in a laser plasma with increased collisionality
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SYSNO ASEP 0351940 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Electron kinetics in a laser plasma with increased collisionality Author(s) Mašek, Jan (FZU-D) RID
Rohlena, Karel (FZU-D) RIDSource Title Radiation Effects and Defects in Solids. - : Taylor & Francis - ISSN 1042-0150
Roč. 165, 6-10 (2010), s. 405-411Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords ion sources ; stimulated Raman scattering ; Vlasov-Maxwell model ; Raman cascading Subject RIV BH - Optics, Masers, Lasers CEZ AV0Z10100523 - FZU-D (2005-2011) UT WOS 000281854500002 DOI 10.1080/10420151003715283 Annotation The fast electron group may be generated by various accelerating mechanisms. One of the key processes leading to the electron acceleration is the Raman scattering in its non-linear phase. The development of the Raman instability requires an unimpeded kinetic evolution in the electron phase space, which is a condition well fulfilled in the outer corona of the plasma generated by the 1st harmonics of a near-infrared laser. In this case, the generated plasma is only weakly collisional and the Raman scattering is accompanied by a complex kinetic evolution in the phase-space, such as a saturation of Landau damping, which is then translated in an unfavourable time dependence of the reflected light intensity and several fast ion groups. However, even when working with the 3rd harmonics illumination in the visible or near-UV range, by which the plasma is rendered more collisional and a part of the mentioned kinetic behaviour is suppressed, some residual fast groups may still be observed. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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