NSSC OpenIR  > 空间科学部
Effects of Shock and Turbulence Properties on Electron Acceleration
Qin, G.; Kong, F. -J.; Zhang, L. -H.; Qin, G (reprint author), Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China.
Department空间科学部
Source PublicationASTROPHYSICAL JOURNAL
2018
Volume860Issue:1Pages:3
ISSN0004-637X
Language英语
KeywordAcceleration Of Particles Plasmas Shock Waves Sun: Coronal Mass Ejections (Cmes) Sun: Particle Emission Turbulence
AbstractUsing test particle simulations, we study electron acceleration at collisionless shocks with a two-component model turbulent magnetic field with slab component including dissipation range. We investigate the importance of the shock-normal angle theta(Bn), magnetic turbulence level (b/B-0)(2), and shock thickness on the acceleration efficiency of electrons. It is shown that at perpendicular shocks the electron acceleration efficiency is enhanced with the decrease of (b/B-0)(2), and at (b/B-0)(2) = 0.01 the acceleration becomes significant due to a strong drift electric field with long time particles staying near the shock front for shock drift acceleration (SDA). In addition, at parallel shocks the electron acceleration efficiency is increasing with the increase of (b/B-0)(2), and at (b/B-0)(2) = 10.0 the acceleration is very strong due to sufficient pitch-angle scattering for first-order Fermi acceleration, as well as due to the large local component of the magnetic field perpendicular to the shock-normal angle for SDA. On the other hand, the high perpendicular shock acceleration with (b/B-0)(2) = 0.01 is stronger than the high parallel shock acceleration with (b/B-0)(2) = 10.0, the reason might be the assumption that SDA is more efficient than first-order Fermi acceleration. Furthermore, for oblique shocks, the acceleration efficiency is small no matter whether the turbulence level is low or high. Moreover, for the effect of shock thickness on electron acceleration at perpendicular shocks, we show that there exists the bendover thickness, L-diff,L-b. The acceleration efficiency does not noticeably change if the shock thickness is much smaller than L-diff,L-b. However, if the shock thickness is much larger than L-diff,L-b, the acceleration efficiency starts to drop abruptly.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6327
Collection空间科学部
Corresponding AuthorQin, G (reprint author), Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China.
Recommended Citation
GB/T 7714
Qin, G.,Kong, F. -J.,Zhang, L. -H.,et al. Effects of Shock and Turbulence Properties on Electron Acceleration[J]. ASTROPHYSICAL JOURNAL,2018,860(1):3.
APA Qin, G.,Kong, F. -J.,Zhang, L. -H.,&Qin, G .(2018).Effects of Shock and Turbulence Properties on Electron Acceleration.ASTROPHYSICAL JOURNAL,860(1),3.
MLA Qin, G.,et al."Effects of Shock and Turbulence Properties on Electron Acceleration".ASTROPHYSICAL JOURNAL 860.1(2018):3.
Files in This Item:
File Name/Size DocType Version Access License
201886013.pdf(691KB)期刊论文作者接受稿开放获取CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Qin, G.]'s Articles
[Kong, F. -J.]'s Articles
[Zhang, L. -H.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Qin, G.]'s Articles
[Kong, F. -J.]'s Articles
[Zhang, L. -H.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Qin, G.]'s Articles
[Kong, F. -J.]'s Articles
[Zhang, L. -H.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.