H. Che
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View article: Investigation into Bioactive Selenium Species and the Mechanism of Action Behind Selenium-Enriched Rapeseed Flowering Stalks Alleviating Cadmium-Induced Toxicity in Mouse Sertoli Cells
Investigation into Bioactive Selenium Species and the Mechanism of Action Behind Selenium-Enriched Rapeseed Flowering Stalks Alleviating Cadmium-Induced Toxicity in Mouse Sertoli Cells Open
Cadmium (Cd) is a recognized environmental contaminant, present in soil, water, and food, which has been reported to cause male reproductive damage in vivo and vitro. Selenium-enriched rapeseed flowering stalks exhibit protective effects a…
View article: Impact of tearing instability on the global quadrupole Hall magnetic field in an anti-parallel magnetic reconnection
Impact of tearing instability on the global quadrupole Hall magnetic field in an anti-parallel magnetic reconnection Open
Hall effect generates a global quadrupole Hall magnetic field, which plays a crucial role in facilitating fast magnetic reconnection (MR). Tearing instability often arises in MR due to the increasing magnetic shear during the thinning of t…
View article: Impact of transverse magnetic field on electromagnetic electron Kelvin–Helmholtz instability and a new electron Rayleigh–Taylor instability
Impact of transverse magnetic field on electromagnetic electron Kelvin–Helmholtz instability and a new electron Rayleigh–Taylor instability Open
The effects of transverse magnetic field on the electromagnetic (EM) electron Kelvin–Helmholtz instability (EKHI) in incompressible, inviscid, and collisionless plasma are investigated, assuming step-function electron velocity U0 and densi…
View article: Transition from Vortical to Alfvénic-like Fermi Electron Acceleration in Magnetic Reconnection with Increasing Guide Field
Transition from Vortical to Alfvénic-like Fermi Electron Acceleration in Magnetic Reconnection with Increasing Guide Field Open
Using particle-in-cell simulations of magnetic reconnection (MR), we investigate how the changing magnetic guide field strength impacts the evolution of electron Kelvin–Helmholtz instability (EKHI) and the associated Fermi electron acceler…
View article: Plasma compressibility and the generation of electrostatic electron Kelvin–Helmholtz instability
Plasma compressibility and the generation of electrostatic electron Kelvin–Helmholtz instability Open
This study explores the generation of electrostatic (ES) electron Kelvin–Helmholtz instability (EKHI) in collisionless plasma with a step-function electron velocity shear akin to that developed in the electron diffusion region in magnetic …
View article: Modeling electron acceleration during the contraction of a magnetic island
Modeling electron acceleration during the contraction of a magnetic island Open
Magnetic reconnection releases the magnetic energy through the contraction of multi-magnetic island leading to the electron acceleration as proposed by Drake et. al in 2006. However, how the released magnetic energy is converted into elect…
View article: Suprathermal Electron Transport in the Solar Wind: Effects of Coulomb Collisions and Whistler Turbulence
Suprathermal Electron Transport in the Solar Wind: Effects of Coulomb Collisions and Whistler Turbulence Open
The nature and radial evolution of solar wind electrons in the suprathermal energy range are studied. A wave–particle interaction tensor and a Fokker–Planck Coulomb collision operator are introduced into the kinetic transport equation desc…
View article: The Scaling of Vortical Electron Acceleration in Thin-current Magnetic Reconnection and Its Implications in Solar Flares
The Scaling of Vortical Electron Acceleration in Thin-current Magnetic Reconnection and Its Implications in Solar Flares Open
To investigate how magnetic reconnection (MR) accelerates electrons to a power-law energy spectrum in solar flares, we explore the scaling of a kinetic model proposed by Che & Zank (CZ) and compare it to observations. Focusing on thin curr…
View article: Linear Mode Decomposition in Magnetohydrodynamics Revisited
Linear Mode Decomposition in Magnetohydrodynamics Revisited Open
Small-amplitude fluctuations in the magnetized solar wind are measured typically by a single spacecraft. In the magnetohydrodynamics (MHD) description, fluctuations are typically expressed in terms of the fundamental modes admitted by the …
View article: Suprathermal Electron Transport and Electron Beam Formation in the Solar Corona
Suprathermal Electron Transport and Electron Beam Formation in the Solar Corona Open
Electron beams that are commonly observed in the corona were discovered to be associated with solar flares. These “coronal” electron beams are found ≥300 Mm above the acceleration region and have velocities ranging from 0.1 c up to 0.6 c .…
View article: Impact of Magnetic Focusing on the Transport of Energetic Electrons in the Solar Corona
Impact of Magnetic Focusing on the Transport of Energetic Electrons in the Solar Corona Open
Observations of Type III radio bursts discovered that electron beams with power-law energy spectra are commonly produced during solar flares. The locations of these electron beams are ~ 300 Mm above the particle acceleration region of the …
View article: Electromagnetic electron Kelvin–Helmholtz instability
Electromagnetic electron Kelvin–Helmholtz instability Open
On electron kinetic scales, ions and electrons decouple, and electron velocity shear on electron inertial length ∼de can trigger electromagnetic (EM) electron Kelvin–Helmholtz instability (EKHI). In this paper, we present an analytic study…
View article: Ion Acceleration and the Development of a Power-law Energy Spectrum in Magnetic Reconnection
Ion Acceleration and the Development of a Power-law Energy Spectrum in Magnetic Reconnection Open
How charged particles are accelerated efficiently and form a power-law energy spectrum in magnetic reconnection is a problem that is not well understood. In a previous paper, it was shown that the electron Kelvin–Helmholtz instability (EKH…
View article: Flux Ropes, Turbulence, and Collisionless Perpendicular Shock Waves: High Plasma Beta Case
Flux Ropes, Turbulence, and Collisionless Perpendicular Shock Waves: High Plasma Beta Case Open
With the onset of solar maximum and the expected increased prevalence of interplanetary shock waves, Parker Solar Probe is likely to observe numerous shocks in the next few years. An outstanding question that has received surprisingly litt…
View article: The Formation of Electron Outflow Jets with Power-law Energy Distribution in Guide-field Magnetic Reconnection
The Formation of Electron Outflow Jets with Power-law Energy Distribution in Guide-field Magnetic Reconnection Open
Observationally, electron beams with power-law energy spectra are commonly associated with solar flares. Previous studies have found that during magnetic reconnection with a guide field B g larger than 0.1 times the asymptotic field B 0 , …
View article: Electron Acceleration from Expanding Magnetic Vortices During Reconnection with a Guide Field
Electron Acceleration from Expanding Magnetic Vortices During Reconnection with a Guide Field Open
Magnetic reconnection is believed to be responsible for the acceleration of energetic electrons with a power-law spectrum in the solar wind and solar flares. However, recent studies of the leading mechanism of electron acceleration in reco…
View article: A Brief Review on Particle Acceleration in Multi-island Magnetic Reconnection
A Brief Review on Particle Acceleration in Multi-island Magnetic Reconnection Open
The basic physics and recent progresses in theoretical and particle-in-cell (PIC) simulation studies of particle acceleration in multi-island magnetic reconnection are briefly reviewed. Particle acceleration in multi-island magnetic reconn…
View article: The Solar Wind Electron Halo as Produced by Electron Beams Originating in the Lower Corona: Beam Density Dependence
The Solar Wind Electron Halo as Produced by Electron Beams Originating in the Lower Corona: Beam Density Dependence Open
It has been suggested that the isotropic electron halo observed in the solar wind electron velocity distribution function may originate from nanoflare-accelerated electron beams below 1.1 R ⊙ from the solar surface through the nonlinear el…
View article: How Nanoflares Produce Kinetic Waves, Nano-Type III Radio Bursts, and Non-Thermal Electrons in the Solar Wind
How Nanoflares Produce Kinetic Waves, Nano-Type III Radio Bursts, and Non-Thermal Electrons in the Solar Wind Open
Observations of the solar corona and the solar wind discover that the solar\nwind is unsteady and originates from the impulsive events near the surface of\nthe Sun's atmosphere. How solar coronal activities affect the properties of the\nso…
View article: How Nanoflares Produce Kinetic Waves, Nano-Type III Radio Bursts, and Non-Thermal Electrons in the Solar Wind
How Nanoflares Produce Kinetic Waves, Nano-Type III Radio Bursts, and Non-Thermal Electrons in the Solar Wind Open
Observations of the solar corona and the solar wind discover that the solar wind is unsteady and originates from the impulsive events near the surface of the Sun's atmosphere. How solar coronal activities affect the properties of the solar…
View article: On the Rates of Steady, Quasi-steady and Impulsive Magnetic Reconnection
On the Rates of Steady, Quasi-steady and Impulsive Magnetic Reconnection Open
Magnetic reconnection (MR) is considered as a major source of particle energization in astrophysical plasma. In the past, analysis of MR often assumes the magnetostatic condition, i.e. $\partial_t = 0$. We show that under the Sweet-Parker-…
View article: How electron two-stream instability drives cyclic Langmuir collapse and continuous coherent emission
How electron two-stream instability drives cyclic Langmuir collapse and continuous coherent emission Open
Significance Electron two-stream instability (ETSI) is believed to be responsible for the radio bursts observed in both the solar corona and interplanetary medium. What nonlinear kinetic processes self-consistently reconcile the several or…
View article: Common origin of kinetic scale turbulence and the electron halo in the solar wind – Connection to nanoflares
Common origin of kinetic scale turbulence and the electron halo in the solar wind – Connection to nanoflares Open
We summarize our recent studies on the origin of solar wind kinetic scale\nturbulence and electron halo in the electron velocity distribution function.\nIncreasing observations of nanoflares and microscopic type III radio bursts\nstrongly …