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Particle acceleration at shocks and magnetic turbulence in the interplanetary space
2019Dottorato Ricerca in Scienze e Tecnologie Fisiche, Chimiche e dei Materiali.
Chiappetta, Federica +2 more
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Energy spectrum of low-energy fluxes of particles accelerated by interplanetary shocks
Advances in Space Research, 1995Abstract The injection rate of particles at the front of interplanetary shocks has usually been studied locally, around the shock passage by the observer's position, but little is known of how the efficiency of the particle-acceleration process evolves as the shock propagates from the Sun to the Earth.
D Lario, B Sanahuja, A.M Heras
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The acceleration of energetic particle fluxes in shock fronts in interplanetary space
Canadian Journal of Physics, 1968On six occasions during 1966, enhanced fluxes of > 7.5-MeV energetic particles have been observed coincident with the onset of a Forbush decrease which was initiated by a solar flare. The anisotropic character of the particle fluxes indicates that the particles were not trapped and that particle acceleration was occurring in the region associated ...
U. R. Rao, K. G. McCracken, R. P. Bukata
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Particle Acceleration and Alfv’en Wave Generation at the April 4, 2001 Interplanetary Shock
Journal of Experimental and Theoretical Physics, 2018Based on the theory of diffusive shock acceleration of charged particles, we investigate the formation of proton spectra and the generation of an Alfv’en turbulence spectrum by accelerated (storm) particles at the interplanetary shock front in the event occurred at 14:22 UT on April 4, 2001.
S. N. Taneev +2 more
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Space Science Reviews, 1995
We report the results of a study of the 12-hour average distribution functions of high Z nuclei as measured over a 10-day interval on the Ulysses spacecraft at a helioradius of ∼5.2 A.U. We use the good time and atomic mass resolution of the composition aperture of the HI-SCALE instrument to determine the form of the distribution functions for C, O, Ne,
L. J. Lanzerotti, C. G. Maclennan
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We report the results of a study of the 12-hour average distribution functions of high Z nuclei as measured over a 10-day interval on the Ulysses spacecraft at a helioradius of ∼5.2 A.U. We use the good time and atomic mass resolution of the composition aperture of the HI-SCALE instrument to determine the form of the distribution functions for C, O, Ne,
L. J. Lanzerotti, C. G. Maclennan
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Particle Acceleration in Solar Flares and Escape Into Interplanetary Space
2006We review the physics of particle acceleration and kinematics in solar flares under the particular aspect of their escape and propagation into interplanetary space. The topics include the magnetic topology in acceleration regions, the altitude of flare acceleration regions, evidence for bi-directional acceleration, the asymmetry of upward versus ...
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Origin of coronal and interplanetary shock and particle acceleration of a flare/CME event
Advances in Space Research, 2003By using radio data from ground-based telescopes (from 270 MHz to 25 MHz), and from the Radio and Plasma Wave experiment (WAVES) on board the WIND spacecraft (1–14 MHz and several kHz-11 MHz), as well as FY -2 satellite data, the origin of coronal and interplanetary shock and particle acceleration of the 14 July 2000 flare/CME event (the Bastille day ...
Y.H. Tang, Y. Dai
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AIP Conference Proceedings, 2011
Particle scattering in pure magnetic turbulence is investigated by combining the Newton‐Lorentz equation with the well‐established nonlinear guiding center theory. Cross field diffusion coefficients are calculated as well as certain limits in particle energy and turbulence strength.
Alexander Dosch +5 more
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Particle scattering in pure magnetic turbulence is investigated by combining the Newton‐Lorentz equation with the well‐established nonlinear guiding center theory. Cross field diffusion coefficients are calculated as well as certain limits in particle energy and turbulence strength.
Alexander Dosch +5 more
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The acceleration of energetic charged particles by interplanetary and supernova shock waves
AIP Conference Proceedings, 1979Pioneer 11 observations of energetic proton acceleration in interplanetary shock are in good agreement with predictions of the V↘×B↘ electric field model of shock acceleration. The V↘×B↘ model predicts that relativistic particles are accelerated by a factor of 2–15 in kinetic energy during a single encounter with a quasi‐perpendicular (ψ≳75 ...
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Advances in Space Research, 2005
Abstract Observations of hard X-ray (HXR)/γ-ray continuum and γ-ray lines produced by energetic electrons and ions, respectively, colliding with the solar atmosphere, have shown that large solar flares can accelerate ions up to many GeV and electrons up to hundreds of MeV.
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Abstract Observations of hard X-ray (HXR)/γ-ray continuum and γ-ray lines produced by energetic electrons and ions, respectively, colliding with the solar atmosphere, have shown that large solar flares can accelerate ions up to many GeV and electrons up to hundreds of MeV.
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