scholarly journals Effects of radial electric field on confinement of high energy particles in advanced fusion mirror reactor

2019 ◽  
Vol 68 (10) ◽  
pp. 105201
Author(s):  
Li-Ming Shi ◽  
Xue-Ke Wu ◽  
Di Wan ◽  
Hui-Dong Li ◽  
Qun-Chao Fan ◽  
...  
Keyword(s):  
Electric Field ◽  
Radial Electric Field ◽  
High Energy ◽  
High Energy Particles

scholarly journals Molecular Dynamics Simulation of Cracking Process of Bisphenol F Epoxy Resin under High-Energy Particle Impact

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4339
Author(s):  
Yunqi Xing ◽  
Yuanyuan Chen ◽  
Jiakai Chi ◽  
Jingquan Zheng ◽  
Wenbo Zhu ◽  
...  
Keyword(s):  
Electric Field ◽  
Epoxy Resin ◽  
Degradation Mechanism ◽  
High Energy ◽  
Dynamics Simulation ◽  
Gradient Field ◽  
Large Temperature ◽  
Bisphenol F ◽  
The Impact ◽  
High Energy Particles

The current lead insulation of high-temperature superconductivity equipment is under the combined action of large temperature gradient field and strong electric field. Compared with a uniform temperature field, its electric field distortion is more serious, and it is easy to induce surface discharge to generate high-energy particles, destroy the insulation surface structure and accelerate insulation degradation. In this paper, the degradation reaction process of bisphenol F epoxy resin under the impact of high-energy particles, such as O3−, HO–, H3O+ and NO+, is calculated based on ReaxFF simulation. According to the different types of high-energy particles under different voltage polarities, the micro-degradation mechanism, pyrolysis degree and pyrolysis products of epoxy resin are analyzed. The results show that in addition to the chemical reaction of high-energy particles with epoxy resin, their kinetic energy will also destroy the molecular structure of the material, causing the cross-linked epoxy resin to pyrolyze, and the impact of positive particles has a more obvious impact on the pyrolysis of epoxy resin.

scholarly journals Ion acceleration at dipolarization fronts associated with interchange instability in the magnetotail

2018 ◽  
Author(s):  
Chao Sun ◽  
Yasong Ge ◽  
Haoyu Lu
Keyword(s):  
Electric Field ◽  
Physical Phenomenon ◽  
Leading Edge ◽  
High Energy ◽  
Particle Simulation ◽  
Ion Acceleration ◽  
Interchange Instability ◽  
Almost All ◽  
High Energy Particles ◽  
Hall Mhd

Abstract. It has been confirmed that dipolarization fronts (DFs) can be a result from the existence of interchange instability in the magnetotail. In this paper, we used a Hall MHD model to simulate the evolution of the interchange instability, which produces DFs on the leading edge. A test particle simulation was performed to study the physical phenomenon of ion acceleration on DF. Numerical simulation indicates that almost all particles move towards the earthward and dawnward and then drift to the tail. The DF-reflected ion population on the duskside appears earlier as a consequence of the asymmetric Hall electric field. Ions, with dawn-dusk asymmetric semicircle behind the DF, may tend to be accelerated to a higher energy (> 13.5 keV). These high-energy particles are eventually concentrated in the dawnside. Ions experience effective acceleration by the dawnward electric field Ey while they drift through the dawn flank of the front towards the tail.

Observation of High-Energy Particles in the Inner Radiation Belt by the HEP Instrument of the Arase Satellite

2020 ◽  
Vol 18 (6) ◽  
pp. 398-403
Author(s):  
Honoka TODA ◽  
Wataru MIYAKE ◽  
Takefumi MITANI ◽  
Takeshi TAKASHIMA ◽  
Yoshizumi MIYOSHI ◽  
...  
Keyword(s):  
Radiation Belt ◽  
High Energy ◽  
High Energy Particles

scholarly journals Investigation of turbulence rotation and radial electric field in the island divertor and plasma edge at W7-X

2019 ◽  
Vol 61 (5) ◽  
pp. 054003 ◽  
Author(s):  
A Krämer-Flecken ◽  
X Han ◽  
T Windisch ◽  
J Cosfeld ◽  
P Drews ◽  
...  
Keyword(s):  
Electric Field ◽  
Radial Electric Field ◽  
Plasma Edge

scholarly journals Gamma-Ray and Neutrino Signals from Accretion Disk Coronae of Active Galactic Nuclei

Galaxies ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 36
Author(s):  
Yoshiyuki Inoue ◽  
Dmitry Khangulyan ◽  
Akihiro Doi
Keyword(s):  
Active Galactic Nuclei ◽  
Gamma Ray ◽  
Galactic Nuclei ◽  
High Energy ◽  
Thermal Activity ◽  
X Ray ◽  
Cascade Models ◽  
Coronal Activity ◽  
Ngc 1068 ◽  
High Energy Particles

To explain the X-ray spectra of active galactic nuclei (AGN), non-thermal activity in AGN coronae such as pair cascade models has been extensively discussed in the past literature. Although X-ray and gamma-ray observations in the 1990s disfavored such pair cascade models, recent millimeter-wave observations of nearby Seyferts have established the existence of weak non-thermal coronal activity. In addition, the IceCube collaboration reported NGC 1068, a nearby Seyfert, as the hottest spot in their 10 yr survey. These pieces of evidence are enough to investigate the non-thermal perspective of AGN coronae in depth again. This article summarizes our current observational understanding of AGN coronae and describes how AGN coronae generate high-energy particles. We also provide ways to test the AGN corona model with radio, X-ray, MeV gamma ray, and high-energy neutrino observations.

scholarly journals Sputtering of high-energy particles from the Ag{100} surface

1998 ◽  
Vol 57 (19) ◽  
pp. 12564-12572 ◽  
Author(s):  
Che-Chen Chang ◽  
Jiin-Yun Hsieh
Keyword(s):  
High Energy ◽  
High Energy Particles
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