Počet záznamů: 1

Novel features of non-linear Raman instability in a laser plasma

  1. 1.
    0340087 - FZU-D 2010 RIV DE eng J - Článek v odborném periodiku
    Mašek, Martin - Rohlena, Karel
    Novel features of non-linear Raman instability in a laser plasma.
    European Physical Journal D. Roč. 56, č. 1 (2010), s. 79-90 ISSN 1434-6060
    Grant CEP: GA MŠk(CZ) 7E08099; GA MŠk(CZ) LC528; GA ČR GA202/05/2475
    Výzkumný záměr: CEZ:AV0Z10100523
    Klíčová slova: laser plasma * non-linear Raman instability
    Kód oboru RIV: BH - Optika, masery a lasery
    Impakt faktor: 1.513, rok: 2010

    The electron phase space evolution in a non-relativistic and homogeneous laser plasma generated by a nanosecond laser in a near infrared region in the presence of stimulated Raman scattering is investigated by a numerical simulation. The mechanism of electron acceleration in the potential wells of the plasma wave accompanying the Raman back-scattering is analyzed in a 1D Vlasov-Maxwell model. The dominant wave modes are both the backward and the forward propagating Raman waves, each accompanied by a daughter electrostatic wave. In addition to a strong interaction of plasma electrons with the primary electrostatic wave in the case of back-scattering, a cascading is observed consisting in a secondary scattering of the primary Raman back-scattered wave. This phenomenon reduces the Raman reflectivity and causes an acceleration of electrons against the direction of the heating laser beam.
    Trvalý link: http://hdl.handle.net/11104/0183406