Did the 2000 July 14 solar flare accelerate protons to >= 40 GeV?
文献类型：期刊论文
| 作者 | Wang RG(王瑞光) ; Wang, RG
|
| 刊名 | ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2009 |
| 卷号 | 31期号:2页码:#REF! |
| 关键词 | Solar flares Solar energetic protons Ground level enhancement Muon enhancements Muon charge ratio |
| 通讯作者 | Wang, RG (reprint author), Chinese Acad Sci, Inst High Energy Phys, POB 918 3, Beijing 100049, Peoples R China. |
| 英文摘要 | It has been reported that a 4.2 sigma directional muon excess coincident with the 2000 July 14 solar flare was registered by the L3 precision muon spectrometer [The L3 collaboration, P. Achard et al., A&A, 456 (2006) 351]. Using similar analysis method and optimized criteria for event selection we have obtained a 5.7 sigma muon excess in the same sky region and a time duration which well coincides with the peak increase of solar protons observed at lower energies and the hard X-ray and gamma-ray. Furthermore, the momenta of those enhanced muons is investigated. From the counts of mu(+) and mu(-) a low muon charge ratio of mu(1)/mu(-) is obtained as about 1.1 during this event. A Monte Carlo simulation was carried out for this primary proton beam to produce those secondary muons in this sky region, including extensive air shower simulation starting at the top of the atmosphere and L3+C muon chamber simulation underground. The simulation result indicates that the enhanced muons are produced by primary protons over 40 GeV with a most probable energy of similar to 82 GeV. Based on this simulation, a flux upper limit of such a solar proton beam has been estimated as 2.5 x 10(-3)(cm(-2) s(-1) sr(-1)). These high energy protons were accelerated in the impulsive phase of the flare, at about 2 min late of start of the hard X-ray and gamma-ray. (C) 2008 Elsevier B.V. All rights reserved. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 收录类别 | SCI |
| WOS记录号 | WOS:000263854700010 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/226508]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 推荐引用方式 GB/T 7714 | Wang RG,Wang, RG. Did the 2000 July 14 solar flare accelerate protons to >= 40 GeV?[J]. ASTROPARTICLE PHYSICS,2009,31(2):#REF!. |
| APA | 王瑞光,&Wang, RG.(2009).Did the 2000 July 14 solar flare accelerate protons to >= 40 GeV?.ASTROPARTICLE PHYSICS,31(2),#REF!. |
| MLA | 王瑞光,et al."Did the 2000 July 14 solar flare accelerate protons to >= 40 GeV?".ASTROPARTICLE PHYSICS 31.2(2009):#REF!. |
入库方式： OAI收割
来源：高能物理研究所
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