Did the 2000 July 14 solar flare accelerate protons to >= 40 GeV?
Wang RG(王瑞光); Wang, RG
刊名ASTROPARTICLE PHYSICS
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
学科分类Astronomy & Astrophysics; Physics
DOI10.1016/j.astropartphys.2008.12.005
通讯作者Wang, RG (reprint author), Chinese Acad Sci, Inst High Energy Phys, POB 918 3, Beijing 100049, Peoples R China.
文章类型Article
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.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
收录类别SCI
WOS记录号WOS:000263854700010
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被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226508
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
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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!.
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