Geant4 simulations of a wide-angle x-ray focusing telescope
文献类型：期刊论文
| 作者 | Zhao, Donghua1 ; Zhang, Chen1; Yuan, Weimin1; Zhang, Shuangnan1,2; Willingale, Richard3; Ling, Zhixing1
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| 刊名 | EXPERIMENTAL ASTRONOMY
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| 出版日期 | 2017-06-01 |
| 卷号 | 43期号:3页码:267-283 |
| 关键词 | X-ray telescope Geant4 Lobster-eye optics Scattering of charged particles Background Sensitivity |
| 英文摘要 | The 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. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SCATTERING ; SPECTRUM ; PROTONS ; CHANDRA ; OPTICS ; ROSAT |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000403944900003 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8837]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：国家天文台
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