Results 41 to 50 of about 11,658 (351)

Temporal Evolution of Solar Energetic Particle Spectra [PDF]

Solar Physics, 2016
During solar flares and coronal mass ejections, solar energetic par- ticles (SEPs) may be released into the interplanetary medium and near-Earth locations. The energy spectra of SEP events at 1 AU are typically averaged over the entire event or studied in a few snapshots.
Doran, Donald Joseph, Dalla, Silvia
openaire   +1 more source

Particle acceleration in the presence of weak turbulence at an X-type neutral point [PDF]

, 2012
We simulate the likely noisy situation near a reconnection region by superposing many 2D linear reconnection eigenmodes. The superposition of modes on the steady state X-type magnetic field creates multiple X- and O-type neutral points close to the ...
Petkaki, P., MacKinnon, A.L., Burge, C. A., MacKinnon, A. L., Burge, C.A.   +4 more
core   +1 more source

Fe/O Variations Relative to Source Longitude and Heliospheric Current Sheet in Large Solar Energetic Particle Events

The Astrophysical Journal
The Fe/O enhancements exhibit significant variations in gradual solar energetic particle (SEP) events. Several causes have been suggested including transport effects in the interplanetary space and flare contribution.
Jinhye Park, Radoslav Bucik, Hyun-Jin Jeong, Yong-Jae Moon   +3 more
doaj   +1 more source

Encyclopedia of 2D β′‐In2Se3 Growth Using Chemical Vapor Deposition: The Effects of Synthesis Parameters Onto Material Quality

Advanced Engineering Materials, EarlyView.
A distinct semi‐confined inner‐tube chemical vapor deposition geometry enables reproducible, large‐area growth of phase‐pure 2D β′‐In2Se3 from InI + Se precursors. Engineering local vapor transport and optimizing precursor delivery and temperature–time conditions yield uniform continuous films.
Dasun P. W. Guruge, P. Sanju S. Panawala, Joseph F. S. Fernando, Zhenhuan Chen, Chao Zhang, Dong‐Chen Qi, Liangzhi Kou, Konstantin L. Firestein, Dmitri V. Golberg   +8 more
wiley   +1 more source

Solar Energetic Particle Track-production Rates at 1 au: Comparing In Situ Particle Fluxes with Lunar Sample-derived Track Densities

The Astrophysical Journal Letters, 2023
Heavy ( Z > 26) solar energetic particles (SEPs) with energies ∼1 MeV nucleon ^−1 are known to leave visible damage tracks in meteoritic materials. The density of such “solar flare tracks” in lunar and asteroidal samples has been used as a measure of a ...
A. R. Poppe, P. S. Szabo, E. R. Imata, L. P. Keller, R. Christoffersen   +4 more
doaj   +1 more source

The composition of solar energetic particles

The Astrophysical Journal, 1986
The present measurements of elemental abundances in 15 large solar energetic particle events confirm the existence of two major effects: systematic differences between solar energetic particle abundances and photospheric abundances that are approximately correlated with first ionization potential (implying that the solar corona is the likely source ...
R. E. McGuire, T. T. von Rosenvinge, F. B. McDonald   +2 more
openaire   +1 more source

Deconvolution of interplanetary transport of solar energetic particles [PDF]

Journal of Geophysical Research: Space Physics, 1998
We address the problem of deconvolving the effects of interplanetary transport on observed intensity and anisotropy profiles of solar energetic particles with the goal of determining the time profile and spectrum of particle injection near the Sun as well as the interplanetary scattering mean free path.
Ruffolo, D., Khumlumlert, T., Youngdee, W.   +2 more
openaire   +2 more sources

Reconstructing PSP/ISOIS Pitch-angle-resolved Intensities Using Unsupervised Learning

The Astrophysical Journal
The Integrated Science Investigation of the Sun (IS⊙IS) on board the Parker Solar Probe provides high-resolution measurements of energetic particles across a broad energy range. Of particular interest are the pitch-angle distributions (PADs), which offer
Spiridon Kasapis, Manuel E. Cuesta, Leng Ying Khoo, Hameedullah A. Farooki, Sungmin Pak, Jamey R. Szalay, Mitchell M. Shen, Jamie Rankin, Dionysios Christopoulos, George Livadiotis, David J. McComas   +10 more
doaj   +1 more source

Biomass Native Structure Into Functional Carbon‐Based Catalysts for Fenton‐Like Reactions

Advanced Functional Materials, EarlyView.
This study indicates that eight biomasses with 2D flaky and 1D acicular structures influence surface O types, morphology, defects, N doping, sp2 C, and Co nanoparticles loading in three series of carbon, N‐doped carbon, and cobalt/graphitic carbon. This work identifies how these structural factors impact catalytic pathways, enhancing selective electron
Wenjie Tian, Jingkai Lin, Zhihao Tian, Selusiwe Ncube, Huayang Zhang, Emiliano Cortés, Hongqi Sun, Shaobin Wang   +7 more
wiley   +1 more source

Discovery of a transient radiation belt at Saturn

, 2008
Radiation belts have been detected in situ at five planets. Only at Earth however has any variability in their intensity been heretofore observed, in indirect response to solar eruptions and high altitude nuclear explosions. The Cassini spacecraft's MIMI/
Roussos, E, S. M. Krimigis, Mitchell, DG, Jones, G., Krupp, N., D. C. Hamilton, Armstrong, TP, Krupp, N, Jones, G. H., Paranicas, C., T. P. Armstrong, G. H. Jones, Krimigis, S., Hamilton, DC, Mitchell, D., C. Paranicas, Sergis, N, N. Krupp, Armstrong, T. P., Hamilton, D. C., Mitchell, D. G., Sergis, N., Hamilton, D., E. Roussos, Paranicas, C, Krimigis, S. M., Armstrong, T., N. Sergis, Dialynas, K., Jones, GH, Krimigis, SM, K. Dialynas, D. G. Mitchell, Dialynas, K, Roussos, E.   +34 more
core   +1 more source