45 citations · 202 across the 17 of their papers we have counts for
17 papers
Relationship of transport coefficients with statistical quantities of charged particles
J. F. Wang, G. Qin
In the previous studies, from the Fokker-Planck equation the general spatial transport equation, which contains an infinite number of spatial derivative terms $T_n=κ_{nz}\partial^n…
The efficiency of electron acceleration by ICME-driven shocks
G. Qin, F. -J. Kong, S. -S. Wu
We present a study of the acceleration efficiency of suprathermal electrons at collisionless shock waves driven by interplanetary coronal mass ejections (ICMEs), with the data anal…
Study of momentum diffusion with the effect of adiabatic focusing
J. F. Wang, G. Qin
Momentum diffusion of the energetic charged particles is an important mechanism of the transport process in astrophysics, physics of the fusion devices, and laboratory plasmas. In…
The invariance of the diffusion coefficient with the iterative operations of charged particles' transport equation
J. F. Wang, G. Qin
The Spatial Parallel Diffusion Coefficient (SPDC) is one of the important quantities describing energetic charged particle transport. There are three different definitions for the…
Suprathermal electron acceleration by a quasi-perpendicular shock: simulations and observations
F. -J. Kong, G. Qin
The acceleration of suprathermal electrons in the solar wind is mainly associated with shocks driven by interplanetary coronal mass ejections (ICMEs). It is well known that the acc…
Diffusion coefficient with displacement variance of energetic particles with adiabatic focusing
J. F. Wang, G. Qin
The equation (hereafter DCDV) is a well-known formula of energetic particles describing the relation of parallel diffusion coefficient with the paralle…
Effects of shock and turbulence properties on electron acceleration
G. Qin, F. -J. Kong, L. -H. Zhang
Using test particle simulations we study electron acceleration at collisionless shocks with a two-component model turbulent magnetic field with slab component including dissipation…
Parallel and perpendicular diffusion coefficients of energetic charged particles with adiabatic focusing
J. F. Wang, G. Qin
It is very important to understand stochastic diffusion of energetic charged particles in non-uniform background magnetic field in plasmas of astrophysics and fusion devices. Using…
Modulation of Galactic Cosmic Rays in the Inner Heliosphere, Comparing with PAMELA Measurements
Gang Qin, Zhenning Shen
We develop a numerical model to study the time-dependent modulation of galactic cosmic rays (GCRs) in the inner heliosphere. In the model a time-delayed modified Parker heliospheri…
Magnetic field line random walk in two-dimensional dynamical turbulence
J. F. Wang, G. Qin, Q. M. Ma +2
The field line random walk (FLRW) of magnetic turbulence is one of the important topics in plasma physics and astrophysics. In this article by using the field line tracing method m…
Numerical simulations of particle acceleration at interplanetary quasi-perpendicular shocks
F. -J. Kong, G. Qin, L. -H. Zhang
Using test particle simulations we study particle acceleration at highly perpendicular () shocks under conditions of modeling magnetic turbulence. We adopt a b…
Perpendicular diffusion coefficient of cosmic rays in the presence of weak adiabatic focusing
J. F. Wang, G. Qin, Q. M. Ma +2
The influence of adiabatic focusing on particle diffusion is an important topic in astrophysics and plasma physics. In the past several authors have explored the influence of along…
Numerical simulations of solar energetic particle event timescales associated with ICMES
S. -Y. Qi, G. Qin, Y. Wang
Recently, S.W. Kahler studied the solar energetic particle (SEP) event timescales associated with coronal mass ejections (CMEs) from spacecraft data analysis. They obtained differe…
Simulations of a gradual solar energetic particle event observed by Helios 1, Helios 2, and IMP 8
G. Qin, Y. Wang
In this work, a gradual solar energetic particle (SEP) event observed by multispacecraft has been simulated. The time profiles of SEP fluxes accelerated by an interplanetary shock…
Simulations of the spatial and temporal invariance in the spectra of gradual solar energetic particle events
Yang Wang, Gang Qin
The spatial and temporal invariance in the spectra of energetic particles in the gradual solar events is reproduced in the simulations. Based on a numerical solution of the focused…
Study of Different Solar Cycle Variations of Solar Energetic Particles and Cosmic Rays by Despiking ACE/SIS Heavy-Ion Fluxes
G Qin, L. -L. Zhao
Cosmic Rays (CRs) include Galactic Cosmic Rays (GCRs) and Anomalous Cosmic Rays (ACRs). The CR flux data of protons and heavy-ions observed with spacecraft are often seriously cont…
Estimation of the release time of solar energetic particles near the Sun
Y. Wang, G. Qin
This paper investigates the onset time of Solar Energetic Particle (SEP) events with numerical simulations, and analyses the accuracy of the Velocity Dispersion Analysis (VDA) meth…