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Interplanetary turbulences causing unusual anisotropic wave trains in cosmic rays
Astroparticle Physics, 2007Abstract The various observed harmonics of the cosmic ray variation may be understood on a unified basis if the free space cosmic ray anisotropy is non-sinusoidal in form. The major objective of this paper is to study the first three harmonics of high amplitude wave trains of cosmic ray intensity over the period 1991–1994 for Deep River Neutron ...
R MISHRA, R MISHRA
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On the Transmission of Turbulence Across Interplanetary Shocks: Observations and Theory
2023Collisionless magnetohydrodynamic shocks are ubiquitous in solar wind and in other space plasmas. They serve as natural sites where charged particles can be accelerated to supra-thermal energies via various Fermi acceleration mechanisms. Upstream and downstream fluctuations play a key role in these processes because they can act as scatter centers ...
Alexander Pitna +6 more
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Transport of solar electrons in the turbulent interplanetary magnetic field
Physics of Plasmas, 2016The turbulent transport of solar energetic electrons in the interplanetary magnetic field is investigated by means of a test-particle Monte-Carlo simulation. The magnetic fields are modeled as a combination of the Parker field and a turbulent component.
J. Ablaßmayer, R. C. Tautz, N. Dresing
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Radar detection of interplanetary shocks: Scattering by anisotropic Langmuir turbulence
Advances in Space Research, 2010Earth-directed interplanetary shocks associated with Coronal Mass Ejections (CMEs) are known to have a severe impact on the magnetosphere, causing strong geomagnetic storms and substorms. Hence, early detection of such shocks is important. Here we study the feasibility of radar detection of interplanetary shocks.
Mykola V. Khotyaintsev +3 more
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Interplanetary MHD turbulence: A wavelet approach
1997Using solar wind data recorded by the Helios-2 spacecraft at 0.3 AU we analyse MHD turbulence by means of continuous wavelet transform. This new technique, differently from FFT technique, provides a good spatial and temporal resolution. This feature allows to study in more detail local properties of solar wind turbulence. Power density spectra computed
PIETROPAOLO, Ermanno +3 more
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Absence of upstream energetic ions under turbulent radial interplanetary magnetic field
Journal of Geophysical Research: Space Physics, 1992According to Fermi models as applied to the Earth's bow shock energetic particles are accelerated most efficiently under radial interplanetary magnetic field (IMF) conditions. In an earlier paper (Sarris and Krimigis, 1988) we tested the Fermi mechanism for cases of radial IMF when no detectable ambient energetic particle fluxes were present.
E. T. Sarris +2 more
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On the scaling properties of anisotropy of interplanetary magnetic turbulent fluctuations
EPL (Europhysics Letters), 2010The anisotropic character of interplanetary magnetic-field turbulence has been studied through the analysis of Cluster data. The full tensor of the mixed second-order structure functions has been used to quatitatively measure the degree of anisotropy and its effect on small-scale turbulence.
SORRISO VALVO L +2 more
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A power spectral analysis of turbulence associated with interplanetary shock waves
AIP Conference Proceedings, 2013We calculate the power spectra densities of magnetic field fluctuations associated with interplanetary shock waves at 1AU, utilizing in-situ magnetic field measurements from spacecraft ACE and Wind. We derive related quantities both upstream and downstream of a shock as a function of time/distance away from the shock passage.
Qiang Hu +3 more
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Correlation lengths, the Ultrascale, and the spatial structure of interplanetary turbulence
AIP Conference Proceedings, 1999Characteristic length scales can be employed to describe the large scale structural and statistical features of solar wind plasma turbulence. At least two outer scales of interplanetary turbulence, the correlation scale and an independent quantity that has been called the “Ultra scale,” have application in the theory of field line random walk and ...
W. H. Matthaeus +2 more
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Hydromagnetic Waves, Turbulence, and Collisionless Processes in the Interplanetary Medium
1983The solar wind does not flow quietly. It seethes and undulates, fluctuating on time scales that range from the solar rotation period down to fractions of milliseconds. Most of the power in interplanetary waves and turbulence lies at hydromagnetic scales.
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