Geant4 simulations of a wide-angle x-ray focusing telescope
文献类型：期刊论文
| 作者 | Zhang, SN ; Zhao, DH; Zhang SN(张双南); Zhang, C; Willingale, R; Ling, ZX; Yuan, WM
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| 刊名 | EXPERIMENTAL ASTRONOMY
 |
| 出版日期 | 2017 |
| 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 |
| ISSN号 | 0922-6435 |
| DOI | 10.1007/s10686-017-9534-5 |
| 文献子类 | Article |
| 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. |
| 电子版国际标准刊号 | 1572-9508 |
| WOS关键词 | SCATTERING ; SPECTRUM ; PROTONS ; CHANDRA ; OPTICS ; ROSAT |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000403944900003 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/284772]  |
| 专题 | 高能物理研究所_粒子天体物理中心 高能物理研究所_加速器中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Zhang, SN,Zhao, DH,Zhang SN,et al. Geant4 simulations of a wide-angle x-ray focusing telescope[J]. EXPERIMENTAL ASTRONOMY,2017,43(3):267-283. |
| APA | Zhang, SN.,Zhao, DH.,张双南.,Zhang, C.,Willingale, R.,...&Yuan, WM.(2017).Geant4 simulations of a wide-angle x-ray focusing telescope.EXPERIMENTAL ASTRONOMY,43(3),267-283. |
| MLA | Zhang, SN,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：高能物理研究所
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