Stochastic energy diffusion of electrons in a plasma by an electron cyclotron wave (Articolo in rivista)

Type
Label
  • Stochastic energy diffusion of electrons in a plasma by an electron cyclotron wave (Articolo in rivista) (literal)
Anno
  • 1993-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.860857 (literal)
Alternative label
  • Daniela Farina1, Roberto Pozzoli2, Aniello Mennella2, and Dario Ronzio2 (1993)
    Stochastic energy diffusion of electrons in a plasma by an electron cyclotron wave
    in Physics of fluids. B, Plasma physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Daniela Farina1, Roberto Pozzoli2, Aniello Mennella2, and Dario Ronzio2 (literal)
Pagina inizio
  • 104 (literal)
Pagina fine
  • 111 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pop.aip.org/resource/1/pfbpei/v5/i1/p104_s1 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 5 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 1 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, EURATOM-ENEA-CNR Association, via Bassini 15, I-20133 Milano, Italy 2Dipartimento di Fisica, Università di Milano, via Celoria 16, I-20133 Milano, Italy (literal)
Titolo
  • Stochastic energy diffusion of electrons in a plasma by an electron cyclotron wave (literal)
Abstract
  • The investigation of the energy diffusion process of the electrons in a magnetized plasma due to an electron cyclotron wave in perpendicular propagation with respect to the magnetic field is performed. Starting from the description of the relativistic electron motion by means of an action-angle Hamiltonian H(I,theta,t), the Fokker-Planck-Kolmogorov (FPK) approach to the diffusion is considered for a globally stochastic regime of the system. In this regime, the phase correlation process is analyzed, and the characteristic decay time is estimated analytically. The action diffusion coefficient D(I) is derived and compared with a local quasilinear expression. With explicit reference to the low-density regime, where D increases with I, and is very close to the quasilinear coefficient, the solution of the diffusion equation is compared with the results obtained by direct numerical integration of the motion equations for a statistically significant ensemble of particles. A good agreement with the local quasilinear FPK diffusion is observed. In addition, when the amplitude of the perturbation is varied, oscillations of the average action values around the quasilinear results are found on the long time scale. (literal)
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