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Spectra and solar energetic protons over 20 GeV in Bastille Day event
Wang RG(王瑞光); Wang, RG; Wang, JX
2006
发表期刊ASTROPARTICLE PHYSICS
卷号25期号:1页码:#REF!
通讯作者Wang, RG (reprint author), Chinese Acad Sci, Inst High Energy Phys, Ctr Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China.
文章类型Article
摘要Solar energetic particles (SEPs) from large solar flares give important information about the physical process in the solar corona and the heliosphere. Several observations have indicated that solar protons could sometimes be accelerated to at least tens of GeV, even hundreds of GeV, in intense solar energetic process. We studied the solar proton differential energy spectra with energy range of 1-500 MeV at several time intervals during Bastille Day event. It was shown that the spectra could be fitted by a power law function before flare and after flare the power law spectra still existed above 30 MeV although spectra became softer with time. There was a spectral "knee" occurring at similar to 30 MeV. We constructed a solar proton differential spectrum from 30 MeV to 3 GeV at peak flux time 10:30 UT and fitted it in the same manner. On the basis of a supposition of having the same power law spectrum in higher energy, we calculated the solar proton integrated fluxes in energy range of from 500 MeV to 20 GeV and compared them with other results obtained from experimental, modelling and theoretical calculations in other big historic SEP events. A Monte Carlo simulation was carried out for a primary proton beam at the top of the atmosphere producing secondary muons on the ground. Based on the simulation, possibility of registering the solar energetic proton beams with energies over 20 GeV was discussed. (c) 2005 Elsevier B.V. All rights reserved.
关键词solar flare solar energetic proton ground level enhancement solar energy spectra Monte Carlo simulation
学科领域Astronomy & Astrophysics; Physics
DOI10.1016/j.astropartphys.2005.11.002
收录类别SCI
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000235422100004
引用统计
被引频次:15[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/311005/225690
专题粒子天体物理中心
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Wang RG,Wang, RG,Wang, JX. Spectra and solar energetic protons over 20 GeV in Bastille Day event[J]. ASTROPARTICLE PHYSICS,2006,25(1):#REF!.
APA 王瑞光,Wang, RG,&Wang, JX.(2006).Spectra and solar energetic protons over 20 GeV in Bastille Day event.ASTROPARTICLE PHYSICS,25(1),#REF!.
MLA 王瑞光,et al."Spectra and solar energetic protons over 20 GeV in Bastille Day event".ASTROPARTICLE PHYSICS 25.1(2006):#REF!.
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