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Geant4 simulations of a wide-angle x-ray focusing telescope
Zhao, Donghua1; Zhang, Chen1; Yuan, Weimin1; Zhang, Shuangnan1,2; Willingale, Richard3; Ling, Zhixing1
2017-06-01
Source PublicationEXPERIMENTAL ASTRONOMY
Volume43Issue:3Pages:267-283
AbstractThe rapid development of X-ray astronomy has been made possible by widely deploying X-ray focusing telescopes on board many X-ray satellites. Geant4 is a very powerful toolkit for Monte Carlo simulations and has remarkable abilities to model complex geometrical configurations. However, the library of physical processes available in Geant4 lacks a description of the reflection of X-ray photons at a grazing incident angle which is the core physical process in the simulation of X-ray focusing telescopes. The scattering of low-energy charged particles from the mirror surfaces is another noteworthy process which is not yet incorporated into Geant4. Here we describe a Monte Carlo model of a simplified wide-angle X-ray focusing telescope adopting lobster-eye optics and a silicon detector using the Geant4 toolkit. With this model, we simulate the X-ray tracing, proton scattering and background detection. We find that: (1) the effective area obtained using Geant4 is in agreement with that obtained using Q software with an average difference of less than 3%; (2) X-rays are the dominant background source below 10 keV; (3) the sensitivity of the telescope is better by at least one order of magnitude than that of a coded mask telescope with the same physical dimensions; (4) the number of protons passing through the optics and reaching the detector by Firsov scattering is about 2.5 times that of multiple scattering for the lobster-eye telescope.
SubtypeArticle
KeywordX-ray Telescope Geant4 Lobster-eye Optics Scattering Of Charged Particles Background Sensitivity
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationChinese Academy of Sciences(XDA04061100) ; Chinese Academy of Sciences(XDA04061100) ; National Natural Science Foundation of China(11403055 ; National Natural Science Foundation of China(11403055 ; China Post-doctoral Science Foundation(2014M561068) ; China Post-doctoral Science Foundation(2014M561068) ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science ; Strategic Priority Research Program on Space Science ; 11203043 ; 11203043 ; 11427804) ; 11427804) ; Chinese Academy of Sciences(XDA04061100) ; Chinese Academy of Sciences(XDA04061100) ; National Natural Science Foundation of China(11403055 ; National Natural Science Foundation of China(11403055 ; China Post-doctoral Science Foundation(2014M561068) ; China Post-doctoral Science Foundation(2014M561068) ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science ; Strategic Priority Research Program on Space Science ; 11203043 ; 11203043 ; 11427804) ; 11427804)
DOI10.1007/s10686-017-9534-5
WOS KeywordSCATTERING ; SPECTRUM ; PROTONS ; CHANDRA ; OPTICS ; ROSAT
Indexed BySCI
Language英语
Funding OrganizationChinese Academy of Sciences(XDA04061100) ; Chinese Academy of Sciences(XDA04061100) ; National Natural Science Foundation of China(11403055 ; National Natural Science Foundation of China(11403055 ; China Post-doctoral Science Foundation(2014M561068) ; China Post-doctoral Science Foundation(2014M561068) ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science ; Strategic Priority Research Program on Space Science ; 11203043 ; 11203043 ; 11427804) ; 11427804) ; Chinese Academy of Sciences(XDA04061100) ; Chinese Academy of Sciences(XDA04061100) ; National Natural Science Foundation of China(11403055 ; National Natural Science Foundation of China(11403055 ; China Post-doctoral Science Foundation(2014M561068) ; China Post-doctoral Science Foundation(2014M561068) ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences ; Strategic Priority Research Program on Space Science ; Strategic Priority Research Program on Space Science ; 11203043 ; 11203043 ; 11427804) ; 11427804)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000403944900003
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8837
Collection空间科学研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
3.Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England
Recommended Citation
GB/T 7714
Zhao, Donghua,Zhang, Chen,Yuan, Weimin,et al. Geant4 simulations of a wide-angle x-ray focusing telescope[J]. EXPERIMENTAL ASTRONOMY,2017,43(3):267-283.
APA Zhao, Donghua,Zhang, Chen,Yuan, Weimin,Zhang, Shuangnan,Willingale, Richard,&Ling, Zhixing.(2017).Geant4 simulations of a wide-angle x-ray focusing telescope.EXPERIMENTAL ASTRONOMY,43(3),267-283.
MLA Zhao, Donghua,et al."Geant4 simulations of a wide-angle x-ray focusing telescope".EXPERIMENTAL ASTRONOMY 43.3(2017):267-283.
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