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Geant4 simulations of a wide-angle x-ray focusing telescope
Zhao, DH; Zhang, C; Yuan, WM; Zhang, SN; Willingale, R; Ling, ZX; Zhang SN(张双南)
2017
Source PublicationEXPERIMENTAL ASTRONOMY
ISSN0922-6435
EISSN1572-9508
Volume43Issue:3Pages:267-283
SubtypeArticle
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.
KeywordX-ray telescope Geant4 Lobster-eye optics Scattering of charged particles Background Sensitivity
DOI10.1007/s10686-017-9534-5
WOS KeywordSCATTERING ; SPECTRUM ; PROTONS ; CHANDRA ; OPTICS ; ROSAT
Indexed BySCI ; SCOPUS ; ADS
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000403944900003
ADS Bibcode2017ExA....43..267Z
ADS URLhttps://ui.adsabs.harvard.edu/abs/2017ExA....43..267Z
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2017ExA....43..267Z/citations
AXRIV CODE173
inspireid1519884
Citation statistics
Cited Times:0 [INSPIRE]
Cited Times:8 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/284772
Collection粒子天体物理中心
加速器中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Zhao, DH,Zhang, C,Yuan, WM,et al. Geant4 simulations of a wide-angle x-ray focusing telescope[J]. EXPERIMENTAL ASTRONOMY,2017,43(3):267-283.
APA Zhao, DH.,Zhang, C.,Yuan, WM.,Zhang, SN.,Willingale, R.,...&张双南.(2017).Geant4 simulations of a wide-angle x-ray focusing telescope.EXPERIMENTAL ASTRONOMY,43(3),267-283.
MLA Zhao, DH,et al."Geant4 simulations of a wide-angle x-ray focusing telescope".EXPERIMENTAL ASTRONOMY 43.3(2017):267-283.
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