About: Beam-plasma interaction in randomly inhomogeneous plasmas and statistical properties of small-amplitude Langmuir waves in the solar wind and electron foreshock     Goto   Sponge   NotDistinct   Permalink

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Description
  • V článku je prezentován model šíření vln v nestabilním plasmatu za přítomnosti nehomogenit. Tento model popisuje lineární interakci Langmuirových vlnových paketů s elektronovým svazkem a bere v úvahu angulární difůzi vlnového vektoru v důsledku rozptylu na fluktuacích hustoty. Vývoj vlnových balíků v nehomogením plazmatu s elektronoým svazkem je studovám pomocí tohoto modelu. K analýze dat z numerického modelu a z družicových měření byla použita Pearsonova metoda klasifikace distribučních funkcí. Bylo ukázáno, že rozdělení spektrální hustoty měřěné družicí CLUSTER v Zemském foršoku patří do Pearsonovy IV třídy distribucí. Hlavním důvodem pro tuto odchylku od normálního rozdělení je nízký efektivní počet oblastí růstu vln a věta o centrální limitě tedy nemůže být aplikována v typických podmínkách ve foršoku. V případě vyšších amplitud bylo navrženo, že chvosty distribuční funkce mohou být ovlivněny změnami grupové rychlost v důsledku odrazu vln na nehomogenitách plasmatu. (cs)
  • A numerical model for wave propagation in an unstable plasma with inhomogeneities is developed. This model describes the linear interaction of Langmuir wave packets with an electron beam and takes into account the angular diffusion of the wave vector due to wave scattering on small-amplitude density fluctuations, as well as suppression of the instability caused by the removal of the wave from the resonance with particles during crossing density perturbations of relatively large amplitude. Using this model, the evolution of the wave packets in inhomogeneous plasmas with an electron beam is studied. To analyze data obtained both in space experiments and numerical modeling, a Pearson technique was used to classify the spectral density distributions. It was shown that both experimental distributions obtained within the Earth's foreshock aboard the CLUSTER spacecraft and model distributions for the logarithm of wave intensity belong to Pearson type IV rather than normal.
  • A numerical model for wave propagation in an unstable plasma with inhomogeneities is developed. This model describes the linear interaction of Langmuir wave packets with an electron beam and takes into account the angular diffusion of the wave vector due to wave scattering on small-amplitude density fluctuations, as well as suppression of the instability caused by the removal of the wave from the resonance with particles during crossing density perturbations of relatively large amplitude. Using this model, the evolution of the wave packets in inhomogeneous plasmas with an electron beam is studied. To analyze data obtained both in space experiments and numerical modeling, a Pearson technique was used to classify the spectral density distributions. It was shown that both experimental distributions obtained within the Earth's foreshock aboard the CLUSTER spacecraft and model distributions for the logarithm of wave intensity belong to Pearson type IV rather than normal. (en)
Title
  • Beam-plasma interaction in randomly inhomogeneous plasmas and statistical properties of small-amplitude Langmuir waves in the solar wind and electron foreshock
  • Interakce svazku s plazmatem za přítomnosti náhodných fluktuací a (cs)
  • Beam-plasma interaction in randomly inhomogeneous plasmas and statistical properties of small-amplitude Langmuir waves in the solar wind and electron foreshock (en)
skos:prefLabel
  • Beam-plasma interaction in randomly inhomogeneous plasmas and statistical properties of small-amplitude Langmuir waves in the solar wind and electron foreshock
  • Interakce svazku s plazmatem za přítomnosti náhodných fluktuací a (cs)
  • Beam-plasma interaction in randomly inhomogeneous plasmas and statistical properties of small-amplitude Langmuir waves in the solar wind and electron foreshock (en)
skos:notation
  • RIV/68378289:_____/07:00090435!RIV08-AV0-68378289
http://linked.open.../vavai/riv/strany
  • A10109/1;A10109/12
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(IAA300420602), P(IAA301120601), Z(AV0Z30420517)
http://linked.open...iv/cisloPeriodika
  • A10
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 411454
http://linked.open...ai/riv/idVysledku
  • RIV/68378289:_____/07:00090435
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • plasma waves; kinetic waves and instabilities; foreshock; solar wind (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [5511050EDB71]
http://linked.open...i/riv/nazevZdroje
  • Journal of Geophysical Research
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 112
http://linked.open...iv/tvurceVysledku
  • Souček, Jan
  • Pickett, J. S.
  • Cairns, I. H.
  • Krasnoselskikh, V. V.
  • Lobzin, V. V.
  • Musatenko, K.
http://linked.open...n/vavai/riv/zamer
issn
  • 0148-0227
number of pages
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