Results 161 to 170 of about 669 (180)

Particle acceleration at shocks and magnetic turbulence in the interplanetary space

2019
Dottorato Ricerca in Scienze e Tecnologie Fisiche, Chimiche e dei Materiali.
Chiappetta, Federica, Carbone, Vincenzo, Lepreti, Fabio   +2 more
openaire   +1 more source

The acceleration of energetic particle fluxes in shock fronts in interplanetary space

Canadian Journal of Physics, 1968
On 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
openaire   +1 more source

Time-dependent Acceleration of Solar Wind Particles at Interplanetary Traveling Shocks

AIP Conference Proceedings, 2008
A time‐dependent focused transport model is used to model how solar wind protons are injected from the suprathermal tail of the solar wind distribution into diffusive shock acceleration at both a strong and a weak coronal mass ejection‐driven shock. It is discussed how the temporal evolution of the injection and acceleration process can result in solar
J. A. le Roux, Gang Li, Qiang Hu, Olga Verkhoglyadova, Gary P. Zank, R. P. Lin, J. Luhmann   +6 more
openaire   +1 more source

Acceleration of low‐energy protons and alpha particles at interplanetary shock waves

Journal of Geophysical Research: Space Physics, 1983
We have investigated low‐energy protons and alpha particles in the energy range 30 keV/charge to 150 keV/charge associated with three different interplanetary shock waves in the immediate preshock and postshock region. The data were obtained with the Max‐Planck‐Institut/University of Maryland sensor system on ISEE 3.
M. Scholer, F. M. Ipavich, G. Gloeckler, D. Hovestadt   +3 more
openaire   +1 more source

Energy spectrum of low-energy fluxes of particles accelerated by interplanetary shocks

Advances in Space Research, 1995
Abstract 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
openaire   +1 more source

Origin of coronal and interplanetary shock and particle acceleration of a flare/CME event

Advances in Space Research, 2003
By 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
openaire   +1 more source

Particle Acceleration in Solar Flares and Escape Into Interplanetary Space

2006
We 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 ...
openaire   +1 more source

Study of Distribution Functions of Interplanetary Particles Accelerated at Co-Rotating Interaction Region at ∼5A.U.

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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Particle acceleration and MHD wave excitation upstream of interplanetary shocks

Advances in Space Research, 1984
The theory of diffusive shock acceleration and its application in interplanetary space are reviewed. Special emphasis is placed on the distinction between diffusive and shock-drift shock acceleration, on ion-excitation of MHD waves upstream of the shock and the resulting self-consistent configuration of waves and accelerated ions, and on the ...
openaire   +1 more source

Particle Acceleration and Alfv’en Wave Generation at the April 4, 2001 Interplanetary Shock

Journal of Experimental and Theoretical Physics, 2018
Based 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, S. A. Starodubtsev, E. G. Berezhko   +2 more
openaire   +1 more source