Beam‐plasma interaction in randomly inhomogeneous plasmas and statistical properties of small‐amplitude Langmuir waves in the solar wind and electron foreshock
Identifieur interne : 001450 ( Istex/Checkpoint ); précédent : 001449; suivant : 001451Beam‐plasma interaction in randomly inhomogeneous plasmas and statistical properties of small‐amplitude Langmuir waves in the solar wind and electron foreshock
Auteurs : V. V. Krasnoselskikh [France] ; V. V. Lobzin [France] ; K. Musatenko [France] ; J. Soucek [République tchèque] ; J. S. Pickett [États-Unis] ; I. H. Cairns [Australie]Source :
- Journal of Geophysical Research: Space Physics [ 0148-0227 ] ; 2007-10.
Descripteurs français
- Wicri :
- topic : Simulation, énergie des vagues.
English descriptors
- KwdEn :
- Absolute value, Amplitude, Amplitude distribution, Angular diffusion, Angular width, Astrophys, Atmospheric physics, Beam speed, Blue curve, Blue line, Blue lines, Cairn, Central limit theorem, Clumpy langmuir waves, Cluster spacecraft, Corresponding data point, Corresponding thresholds, Czech republic, Density fluctuations, Density perturbations, Different factors, Different values, Differential equation, Diffusion coefficient, Diffusion effect, Dimensionless parameters, Distribution function, Effective growth rate, Effective number, Electric field, Electron beam, Electron foreshock, Empirical distribution, Empirical distributions, Error function, Experimental data, Finite regions, First test, Fluctuation, Foreshock, Foreshock boundary, Foreshock langmuir waves, Frequency range, General case, Geophys, Green curve, Green line, Group velocity, Growth rate, Gurnett, High frequencies, Impulse rate, Inhomogeneity, Inhomogeneous, Inhomogeneous plasma, Inhomogeneous plasmas, Instability, Integral equation, Intense langmuir waves, Intensive studies, Interplanetary medium, Isee propagation experiment, Kellogg, Krasnoselskikh, Langmuir, Langmuir wave amplitudes, Langmuir wave packets, Langmuir waves, Large amplitude, Large amplitudes, Lett, Linear interaction, Logarithm, Lognormal distribution, Magnetic field, Main reason, Maximum likelihood, Middle panel, Middle panels, Model distributions, Moment technique, Nimp, Nonlinear, Nonlinear processes, Normal distribution, Normal distributions, Null hypothesis, Numerical model, Numerical modeling, Numerical simulations, Other hand, Packet, Parameter, Pearson curves, Pearson diagram, Pearson distributions, Pearson parameters, Pearson technique, Pearson type, Plasma, Plasma density, Plasma density profile, Plasma inhomogeneities, Plasma oscillations, Plasma waves, Positive growth rate, Present paper, Previous section, Probability density function, Probability distribution, Probability distributions, Radio sources, Random density inhomogeneities, Random inhomogeneities, Relative role, Shot noise, Significance level, Similar problem, Simulation, Small ratios, Solar physics, Solar radio bursts, Solar wind, Spacecraft, Spatial evolution, Spatial scales, Spatial variations, Spectral density distributions, Spectral energy density, Statistical ensemble, Statistical properties, Statistical scatter, Stochastic, Stochastic growth, Stochastic growth theory, Stochastic process, Stochastic wave growth, Terrestrial electron foreshock, Typical conditions, Typical value, Unstable plasma, Wave, Wave amplitude, Wave amplitudes, Wave energies, Wave energy, Wave energy density, Wave intensity, Wave numbers, Wave packet, Wave packets, Wave propagation, Wave spectra, Wave statistics, Wave vector.
- Teeft :
- Absolute value, Amplitude, Amplitude distribution, Angular diffusion, Angular width, Astrophys, Atmospheric physics, Beam speed, Blue curve, Blue line, Blue lines, Cairn, Central limit theorem, Clumpy langmuir waves, Cluster spacecraft, Corresponding data point, Corresponding thresholds, Czech republic, Density fluctuations, Density perturbations, Different factors, Different values, Differential equation, Diffusion coefficient, Diffusion effect, Dimensionless parameters, Distribution function, Effective growth rate, Effective number, Electric field, Electron beam, Electron foreshock, Empirical distribution, Empirical distributions, Error function, Experimental data, Finite regions, First test, Fluctuation, Foreshock, Foreshock boundary, Foreshock langmuir waves, Frequency range, General case, Geophys, Green curve, Green line, Group velocity, Growth rate, Gurnett, High frequencies, Impulse rate, Inhomogeneity, Inhomogeneous, Inhomogeneous plasma, Inhomogeneous plasmas, Instability, Integral equation, Intense langmuir waves, Intensive studies, Interplanetary medium, Isee propagation experiment, Kellogg, Krasnoselskikh, Langmuir, Langmuir wave amplitudes, Langmuir wave packets, Langmuir waves, Large amplitude, Large amplitudes, Lett, Linear interaction, Logarithm, Lognormal distribution, Magnetic field, Main reason, Maximum likelihood, Middle panel, Middle panels, Model distributions, Moment technique, Nimp, Nonlinear, Nonlinear processes, Normal distribution, Normal distributions, Null hypothesis, Numerical model, Numerical modeling, Numerical simulations, Other hand, Packet, Parameter, Pearson curves, Pearson diagram, Pearson distributions, Pearson parameters, Pearson technique, Pearson type, Plasma, Plasma density, Plasma density profile, Plasma inhomogeneities, Plasma oscillations, Plasma waves, Positive growth rate, Present paper, Previous section, Probability density function, Probability distribution, Probability distributions, Radio sources, Random density inhomogeneities, Random inhomogeneities, Relative role, Shot noise, Significance level, Similar problem, Simulation, Small ratios, Solar physics, Solar radio bursts, Solar wind, Spacecraft, Spatial evolution, Spatial scales, Spatial variations, Spectral density distributions, Spectral energy density, Statistical ensemble, Statistical properties, Statistical scatter, Stochastic, Stochastic growth, Stochastic growth theory, Stochastic process, Stochastic wave growth, Terrestrial electron foreshock, Typical conditions, Typical value, Unstable plasma, Wave, Wave amplitude, Wave amplitudes, Wave energies, Wave energy, Wave energy density, Wave intensity, Wave numbers, Wave packet, Wave packets, Wave propagation, Wave spectra, Wave statistics, Wave vector.
Abstract
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. The main reason for deviations of empirical distributions from the normal one is that the effective number of regions where the waves grow is not very large and, as a consequence, the central limit theorem fails to be true under the typical conditions for the Earth's electron foreshock. For large amplitudes, it is suggested that power law tails can result from variations of wave amplitudes due to changes of group velocity in the inhomogeneous plasma, in particular due to reflection of waves from inhomogeneities.
Url:
DOI: 10.1029/2006JA012212
Affiliations:
- Australie, France, République tchèque, États-Unis
- Bohême centrale, Centre-Val de Loire, Iowa, Nouvelle-Galles du Sud, Région Centre
- Iowa City, Orléans, Prague, Sydney
- Université d'Orléans, Université de Sydney, Université de l'Iowa
Links toward previous steps (curation, corpus...)
Links to Exploration step
ISTEX:AB59685298F9E5662A9D6717EF2164D52E1E1F5FLe document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Beam‐plasma interaction in randomly inhomogeneous plasmas and statistical properties of small‐amplitude Langmuir waves in the solar wind and electron foreshock</title>
<author><name sortKey="Krasnoselskikh, V V" sort="Krasnoselskikh, V V" uniqKey="Krasnoselskikh V" first="V. V." last="Krasnoselskikh">V. V. Krasnoselskikh</name>
</author>
<author><name sortKey="Lobzin, V V" sort="Lobzin, V V" uniqKey="Lobzin V" first="V. V." last="Lobzin">V. V. Lobzin</name>
</author>
<author><name sortKey="Musatenko, K" sort="Musatenko, K" uniqKey="Musatenko K" first="K." last="Musatenko">K. Musatenko</name>
</author>
<author><name sortKey="Soucek, J" sort="Soucek, J" uniqKey="Soucek J" first="J." last="Soucek">J. Soucek</name>
</author>
<author><name sortKey="Pickett, J S" sort="Pickett, J S" uniqKey="Pickett J" first="J. S." last="Pickett">J. S. Pickett</name>
</author>
<author><name sortKey="Cairns, I H" sort="Cairns, I H" uniqKey="Cairns I" first="I. H." last="Cairns">I. H. Cairns</name>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:AB59685298F9E5662A9D6717EF2164D52E1E1F5F</idno>
<date when="2007" year="2007">2007</date>
<idno type="doi">10.1029/2006JA012212</idno>
<idno type="url">https://api.istex.fr/document/AB59685298F9E5662A9D6717EF2164D52E1E1F5F/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">002054</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">002054</idno>
<idno type="wicri:Area/Istex/Curation">002054</idno>
<idno type="wicri:Area/Istex/Checkpoint">001450</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">001450</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a" type="main">Beam‐plasma interaction in randomly inhomogeneous plasmas and statistical properties of small‐amplitude Langmuir waves in the solar wind and electron foreshock</title>
<author><name sortKey="Krasnoselskikh, V V" sort="Krasnoselskikh, V V" uniqKey="Krasnoselskikh V" first="V. V." last="Krasnoselskikh">V. V. Krasnoselskikh</name>
<affiliation wicri:level="1"><country wicri:rule="url">France</country>
</affiliation>
<affiliation wicri:level="4"><country xml:lang="fr">France</country>
<wicri:regionArea>LPCE/CNRS‐Université d'Orléans, Orléans</wicri:regionArea>
<placeName><region type="region">Centre-Val de Loire</region>
<region type="old region">Région Centre</region>
<settlement type="city">Orléans</settlement>
<settlement type="city">Orléans</settlement>
</placeName>
<orgName type="university">Université d'Orléans</orgName>
</affiliation>
<affiliation wicri:level="1"><country wicri:rule="url">France</country>
</affiliation>
</author>
<author><name sortKey="Lobzin, V V" sort="Lobzin, V V" uniqKey="Lobzin V" first="V. V." last="Lobzin">V. V. Lobzin</name>
<affiliation wicri:level="4"><country xml:lang="fr">France</country>
<wicri:regionArea>LPCE/CNRS‐Université d'Orléans, Orléans</wicri:regionArea>
<placeName><region type="region">Centre-Val de Loire</region>
<region type="old region">Région Centre</region>
<settlement type="city">Orléans</settlement>
<settlement type="city">Orléans</settlement>
</placeName>
<orgName type="university">Université d'Orléans</orgName>
</affiliation>
<affiliation wicri:level="3"><country xml:lang="fr">France</country>
<wicri:regionArea>le Studium Institute for Advanced Studies, Orleans</wicri:regionArea>
<placeName><region type="region">Centre-Val de Loire</region>
<region type="old region">Région Centre</region>
<settlement type="city">Orléans</settlement>
</placeName>
</affiliation>
</author>
<author><name sortKey="Musatenko, K" sort="Musatenko, K" uniqKey="Musatenko K" first="K." last="Musatenko">K. Musatenko</name>
<affiliation wicri:level="4"><country xml:lang="fr">France</country>
<wicri:regionArea>LPCE/CNRS‐Université d'Orléans, Orléans</wicri:regionArea>
<placeName><region type="region">Centre-Val de Loire</region>
<region type="old region">Région Centre</region>
<settlement type="city">Orléans</settlement>
<settlement type="city">Orléans</settlement>
</placeName>
<orgName type="university">Université d'Orléans</orgName>
</affiliation>
</author>
<author><name sortKey="Soucek, J" sort="Soucek, J" uniqKey="Soucek J" first="J." last="Soucek">J. Soucek</name>
<affiliation wicri:level="3"><country xml:lang="fr">République tchèque</country>
<wicri:regionArea>Institute of Atmospheric Physics, Prague</wicri:regionArea>
<placeName><settlement type="city">Prague</settlement>
<region type="région" nuts="2">Bohême centrale</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Pickett, J S" sort="Pickett, J S" uniqKey="Pickett J" first="J. S." last="Pickett">J. S. Pickett</name>
<affiliation wicri:level="4"><country xml:lang="fr">États-Unis</country>
<wicri:regionArea>University of Iowa, Iowa</wicri:regionArea>
<placeName><region type="state">Iowa</region>
<settlement type="city">Iowa City</settlement>
</placeName>
<orgName type="university">Université de l'Iowa</orgName>
</affiliation>
</author>
<author><name sortKey="Cairns, I H" sort="Cairns, I H" uniqKey="Cairns I" first="I. H." last="Cairns">I. H. Cairns</name>
<affiliation wicri:level="4"><country xml:lang="fr">Australie</country>
<wicri:regionArea>University of Sydney, Sydney</wicri:regionArea>
<placeName><settlement type="city">Sydney</settlement>
<region type="état">Nouvelle-Galles du Sud</region>
<settlement type="city">Sydney</settlement>
</placeName>
<orgName type="university">Université de Sydney</orgName>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j" type="main">Journal of Geophysical Research: Space Physics</title>
<title level="j" type="alt">JOURNAL OF GEOPHYSICAL RESEARCH: SPACE PHYSICS</title>
<idno type="ISSN">0148-0227</idno>
<idno type="eISSN">2156-2202</idno>
<imprint><biblScope unit="vol">112</biblScope>
<biblScope unit="issue">A10</biblScope>
<biblScope unit="page-count">12</biblScope>
<date type="published" when="2007-10">2007-10</date>
</imprint>
<idno type="ISSN">0148-0227</idno>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">0148-0227</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Absolute value</term>
<term>Amplitude</term>
<term>Amplitude distribution</term>
<term>Angular diffusion</term>
<term>Angular width</term>
<term>Astrophys</term>
<term>Atmospheric physics</term>
<term>Beam speed</term>
<term>Blue curve</term>
<term>Blue line</term>
<term>Blue lines</term>
<term>Cairn</term>
<term>Central limit theorem</term>
<term>Clumpy langmuir waves</term>
<term>Cluster spacecraft</term>
<term>Corresponding data point</term>
<term>Corresponding thresholds</term>
<term>Czech republic</term>
<term>Density fluctuations</term>
<term>Density perturbations</term>
<term>Different factors</term>
<term>Different values</term>
<term>Differential equation</term>
<term>Diffusion coefficient</term>
<term>Diffusion effect</term>
<term>Dimensionless parameters</term>
<term>Distribution function</term>
<term>Effective growth rate</term>
<term>Effective number</term>
<term>Electric field</term>
<term>Electron beam</term>
<term>Electron foreshock</term>
<term>Empirical distribution</term>
<term>Empirical distributions</term>
<term>Error function</term>
<term>Experimental data</term>
<term>Finite regions</term>
<term>First test</term>
<term>Fluctuation</term>
<term>Foreshock</term>
<term>Foreshock boundary</term>
<term>Foreshock langmuir waves</term>
<term>Frequency range</term>
<term>General case</term>
<term>Geophys</term>
<term>Green curve</term>
<term>Green line</term>
<term>Group velocity</term>
<term>Growth rate</term>
<term>Gurnett</term>
<term>High frequencies</term>
<term>Impulse rate</term>
<term>Inhomogeneity</term>
<term>Inhomogeneous</term>
<term>Inhomogeneous plasma</term>
<term>Inhomogeneous plasmas</term>
<term>Instability</term>
<term>Integral equation</term>
<term>Intense langmuir waves</term>
<term>Intensive studies</term>
<term>Interplanetary medium</term>
<term>Isee propagation experiment</term>
<term>Kellogg</term>
<term>Krasnoselskikh</term>
<term>Langmuir</term>
<term>Langmuir wave amplitudes</term>
<term>Langmuir wave packets</term>
<term>Langmuir waves</term>
<term>Large amplitude</term>
<term>Large amplitudes</term>
<term>Lett</term>
<term>Linear interaction</term>
<term>Logarithm</term>
<term>Lognormal distribution</term>
<term>Magnetic field</term>
<term>Main reason</term>
<term>Maximum likelihood</term>
<term>Middle panel</term>
<term>Middle panels</term>
<term>Model distributions</term>
<term>Moment technique</term>
<term>Nimp</term>
<term>Nonlinear</term>
<term>Nonlinear processes</term>
<term>Normal distribution</term>
<term>Normal distributions</term>
<term>Null hypothesis</term>
<term>Numerical model</term>
<term>Numerical modeling</term>
<term>Numerical simulations</term>
<term>Other hand</term>
<term>Packet</term>
<term>Parameter</term>
<term>Pearson curves</term>
<term>Pearson diagram</term>
<term>Pearson distributions</term>
<term>Pearson parameters</term>
<term>Pearson technique</term>
<term>Pearson type</term>
<term>Plasma</term>
<term>Plasma density</term>
<term>Plasma density profile</term>
<term>Plasma inhomogeneities</term>
<term>Plasma oscillations</term>
<term>Plasma waves</term>
<term>Positive growth rate</term>
<term>Present paper</term>
<term>Previous section</term>
<term>Probability density function</term>
<term>Probability distribution</term>
<term>Probability distributions</term>
<term>Radio sources</term>
<term>Random density inhomogeneities</term>
<term>Random inhomogeneities</term>
<term>Relative role</term>
<term>Shot noise</term>
<term>Significance level</term>
<term>Similar problem</term>
<term>Simulation</term>
<term>Small ratios</term>
<term>Solar physics</term>
<term>Solar radio bursts</term>
<term>Solar wind</term>
<term>Spacecraft</term>
<term>Spatial evolution</term>
<term>Spatial scales</term>
<term>Spatial variations</term>
<term>Spectral density distributions</term>
<term>Spectral energy density</term>
<term>Statistical ensemble</term>
<term>Statistical properties</term>
<term>Statistical scatter</term>
<term>Stochastic</term>
<term>Stochastic growth</term>
<term>Stochastic growth theory</term>
<term>Stochastic process</term>
<term>Stochastic wave growth</term>
<term>Terrestrial electron foreshock</term>
<term>Typical conditions</term>
<term>Typical value</term>
<term>Unstable plasma</term>
<term>Wave</term>
<term>Wave amplitude</term>
<term>Wave amplitudes</term>
<term>Wave energies</term>
<term>Wave energy</term>
<term>Wave energy density</term>
<term>Wave intensity</term>
<term>Wave numbers</term>
<term>Wave packet</term>
<term>Wave packets</term>
<term>Wave propagation</term>
<term>Wave spectra</term>
<term>Wave statistics</term>
<term>Wave vector</term>
</keywords>
<keywords scheme="Teeft" xml:lang="en"><term>Absolute value</term>
<term>Amplitude</term>
<term>Amplitude distribution</term>
<term>Angular diffusion</term>
<term>Angular width</term>
<term>Astrophys</term>
<term>Atmospheric physics</term>
<term>Beam speed</term>
<term>Blue curve</term>
<term>Blue line</term>
<term>Blue lines</term>
<term>Cairn</term>
<term>Central limit theorem</term>
<term>Clumpy langmuir waves</term>
<term>Cluster spacecraft</term>
<term>Corresponding data point</term>
<term>Corresponding thresholds</term>
<term>Czech republic</term>
<term>Density fluctuations</term>
<term>Density perturbations</term>
<term>Different factors</term>
<term>Different values</term>
<term>Differential equation</term>
<term>Diffusion coefficient</term>
<term>Diffusion effect</term>
<term>Dimensionless parameters</term>
<term>Distribution function</term>
<term>Effective growth rate</term>
<term>Effective number</term>
<term>Electric field</term>
<term>Electron beam</term>
<term>Electron foreshock</term>
<term>Empirical distribution</term>
<term>Empirical distributions</term>
<term>Error function</term>
<term>Experimental data</term>
<term>Finite regions</term>
<term>First test</term>
<term>Fluctuation</term>
<term>Foreshock</term>
<term>Foreshock boundary</term>
<term>Foreshock langmuir waves</term>
<term>Frequency range</term>
<term>General case</term>
<term>Geophys</term>
<term>Green curve</term>
<term>Green line</term>
<term>Group velocity</term>
<term>Growth rate</term>
<term>Gurnett</term>
<term>High frequencies</term>
<term>Impulse rate</term>
<term>Inhomogeneity</term>
<term>Inhomogeneous</term>
<term>Inhomogeneous plasma</term>
<term>Inhomogeneous plasmas</term>
<term>Instability</term>
<term>Integral equation</term>
<term>Intense langmuir waves</term>
<term>Intensive studies</term>
<term>Interplanetary medium</term>
<term>Isee propagation experiment</term>
<term>Kellogg</term>
<term>Krasnoselskikh</term>
<term>Langmuir</term>
<term>Langmuir wave amplitudes</term>
<term>Langmuir wave packets</term>
<term>Langmuir waves</term>
<term>Large amplitude</term>
<term>Large amplitudes</term>
<term>Lett</term>
<term>Linear interaction</term>
<term>Logarithm</term>
<term>Lognormal distribution</term>
<term>Magnetic field</term>
<term>Main reason</term>
<term>Maximum likelihood</term>
<term>Middle panel</term>
<term>Middle panels</term>
<term>Model distributions</term>
<term>Moment technique</term>
<term>Nimp</term>
<term>Nonlinear</term>
<term>Nonlinear processes</term>
<term>Normal distribution</term>
<term>Normal distributions</term>
<term>Null hypothesis</term>
<term>Numerical model</term>
<term>Numerical modeling</term>
<term>Numerical simulations</term>
<term>Other hand</term>
<term>Packet</term>
<term>Parameter</term>
<term>Pearson curves</term>
<term>Pearson diagram</term>
<term>Pearson distributions</term>
<term>Pearson parameters</term>
<term>Pearson technique</term>
<term>Pearson type</term>
<term>Plasma</term>
<term>Plasma density</term>
<term>Plasma density profile</term>
<term>Plasma inhomogeneities</term>
<term>Plasma oscillations</term>
<term>Plasma waves</term>
<term>Positive growth rate</term>
<term>Present paper</term>
<term>Previous section</term>
<term>Probability density function</term>
<term>Probability distribution</term>
<term>Probability distributions</term>
<term>Radio sources</term>
<term>Random density inhomogeneities</term>
<term>Random inhomogeneities</term>
<term>Relative role</term>
<term>Shot noise</term>
<term>Significance level</term>
<term>Similar problem</term>
<term>Simulation</term>
<term>Small ratios</term>
<term>Solar physics</term>
<term>Solar radio bursts</term>
<term>Solar wind</term>
<term>Spacecraft</term>
<term>Spatial evolution</term>
<term>Spatial scales</term>
<term>Spatial variations</term>
<term>Spectral density distributions</term>
<term>Spectral energy density</term>
<term>Statistical ensemble</term>
<term>Statistical properties</term>
<term>Statistical scatter</term>
<term>Stochastic</term>
<term>Stochastic growth</term>
<term>Stochastic growth theory</term>
<term>Stochastic process</term>
<term>Stochastic wave growth</term>
<term>Terrestrial electron foreshock</term>
<term>Typical conditions</term>
<term>Typical value</term>
<term>Unstable plasma</term>
<term>Wave</term>
<term>Wave amplitude</term>
<term>Wave amplitudes</term>
<term>Wave energies</term>
<term>Wave energy</term>
<term>Wave energy density</term>
<term>Wave intensity</term>
<term>Wave numbers</term>
<term>Wave packet</term>
<term>Wave packets</term>
<term>Wave propagation</term>
<term>Wave spectra</term>
<term>Wave statistics</term>
<term>Wave vector</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Simulation</term>
<term>énergie des vagues</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract">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. The main reason for deviations of empirical distributions from the normal one is that the effective number of regions where the waves grow is not very large and, as a consequence, the central limit theorem fails to be true under the typical conditions for the Earth's electron foreshock. For large amplitudes, it is suggested that power law tails can result from variations of wave amplitudes due to changes of group velocity in the inhomogeneous plasma, in particular due to reflection of waves from inhomogeneities.</div>
</front>
</TEI>
<affiliations><list><country><li>Australie</li>
<li>France</li>
<li>République tchèque</li>
<li>États-Unis</li>
</country>
<region><li>Bohême centrale</li>
<li>Centre-Val de Loire</li>
<li>Iowa</li>
<li>Nouvelle-Galles du Sud</li>
<li>Région Centre</li>
</region>
<settlement><li>Iowa City</li>
<li>Orléans</li>
<li>Prague</li>
<li>Sydney</li>
</settlement>
<orgName><li>Université d'Orléans</li>
<li>Université de Sydney</li>
<li>Université de l'Iowa</li>
</orgName>
</list>
<tree><country name="France"><noRegion><name sortKey="Krasnoselskikh, V V" sort="Krasnoselskikh, V V" uniqKey="Krasnoselskikh V" first="V. V." last="Krasnoselskikh">V. V. Krasnoselskikh</name>
</noRegion>
<name sortKey="Krasnoselskikh, V V" sort="Krasnoselskikh, V V" uniqKey="Krasnoselskikh V" first="V. V." last="Krasnoselskikh">V. V. Krasnoselskikh</name>
<name sortKey="Krasnoselskikh, V V" sort="Krasnoselskikh, V V" uniqKey="Krasnoselskikh V" first="V. V." last="Krasnoselskikh">V. V. Krasnoselskikh</name>
<name sortKey="Lobzin, V V" sort="Lobzin, V V" uniqKey="Lobzin V" first="V. V." last="Lobzin">V. V. Lobzin</name>
<name sortKey="Lobzin, V V" sort="Lobzin, V V" uniqKey="Lobzin V" first="V. V." last="Lobzin">V. V. Lobzin</name>
<name sortKey="Musatenko, K" sort="Musatenko, K" uniqKey="Musatenko K" first="K." last="Musatenko">K. Musatenko</name>
</country>
<country name="République tchèque"><region name="Bohême centrale"><name sortKey="Soucek, J" sort="Soucek, J" uniqKey="Soucek J" first="J." last="Soucek">J. Soucek</name>
</region>
</country>
<country name="États-Unis"><region name="Iowa"><name sortKey="Pickett, J S" sort="Pickett, J S" uniqKey="Pickett J" first="J. S." last="Pickett">J. S. Pickett</name>
</region>
</country>
<country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Cairns, I H" sort="Cairns, I H" uniqKey="Cairns I" first="I. H." last="Cairns">I. H. Cairns</name>
</region>
</country>
</tree>
</affiliations>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Asie/explor/AustralieFrV1/Data/Istex/Checkpoint
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001450 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Checkpoint/biblio.hfd -nk 001450 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Wicri/Asie |area= AustralieFrV1 |flux= Istex |étape= Checkpoint |type= RBID |clé= ISTEX:AB59685298F9E5662A9D6717EF2164D52E1E1F5F |texte= Beam‐plasma interaction in randomly inhomogeneous plasmas and statistical properties of small‐amplitude Langmuir waves in the solar wind and electron foreshock }}
This area was generated with Dilib version V0.6.33. |