Spectra and solar energetic protons over 20 GeV in Bastille Day event
文献类型：期刊论文
| 作者 | Wang, RG; Wang, JX
|
| 刊名 | ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2006-02-01 |
| 卷号 | 25期号:1页码:41-46 |
| 关键词 | solar flare solar energetic proton ground level enhancement solar energy spectra Monte Carlo simulation |
| 英文摘要 | 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. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000235422100004 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7108]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Yantai Univ, Inst Sci & Technol Optoelect Informat, Yantai 264005, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, RG,Wang, JX. Spectra and solar energetic protons over 20 GeV in Bastille Day event[J]. ASTROPARTICLE PHYSICS,2006,25(1):41-46. |
| APA | Wang, RG,&Wang, JX.(2006).Spectra and solar energetic protons over 20 GeV in Bastille Day event.ASTROPARTICLE PHYSICS,25(1),41-46. |
| MLA | Wang, RG,et al."Spectra and solar energetic protons over 20 GeV in Bastille Day event".ASTROPARTICLE PHYSICS 25.1(2006):41-46. |
入库方式： OAI收割
来源：国家天文台
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