Monitoring method for neutron flux for a spallation target in an accelerator driven sub-critical system
文献类型：期刊论文
| 作者 | Zhao, Qiang1,2; He, Zhi-Yong1; Yang, Lei1; Zhang, Xue-Ying1; Cui, Wen-Juan1; Chen, Zhi-Qiang1; Xu, Hu-Shan1 |
| 刊名 | Chinese physics c
 |
| 出版日期 | 2016-07-01 |
| 卷号 | 40期号:7页码:7 |
| 关键词 | Accelerator driven sub-critical (ads) system Neutron flux Spallation target Fission chamber Fission cross section |
| ISSN号 | 1674-1137 |
| DOI | 10.1088/1674-1137/40/7/076203 |
| 通讯作者 | He, zhi-yong(zyhe@impcas.ac.cn) |
| 英文摘要 | In this paper, we study a monitoring method for neutron flux for the spallation target used in an accelerator driven sub-critical (ads) system, where a spallation target located vertically at the centre of a sub-critical core is bombarded vertically by high-energy protons from an accelerator. first, by considering the characteristics in the spatial variation of neutron flux from the spallation target, we propose a multi-point measurement technique, i.e. the spallation neutron flux should be measured at multiple vertical locations. to explain why the flux should be measured at multiple locations, we have studied neutron production from a tungsten target bombarded by a 250 mev-proton beam with geant4-based monte carlo simulations. the simulation results indicate that the neutron flux at the central location is up to three orders of magnitude higher than the flux at lower locations. secondly, we have developed an effective technique in order to measure the spallation neutron flux with a fission chamber (fc), by establishing the relation between the fission rate measured by fc and the spallation neutron flux. since this relation is linear for a fc, a constant calibration factor is used to derive the neutron flux from the measured fission rate. this calibration factor can be extracted from the energy spectra of spallation neutrons. finally, we have evaluated the proposed calibration method for a fc in the environment of an ads system. the results indicate that the proposed method functions very well. |
| WOS关键词 | TOOLKIT ; MODES |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Nuclear ; Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000381730100019 |
| 出版者 | CHINESE PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2374434 |
| 专题 | 中国科学院大学 |
| 通讯作者 | He, Zhi-Yong |
| 作者单位 | 1.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Qiang,He, Zhi-Yong,Yang, Lei,et al. Monitoring method for neutron flux for a spallation target in an accelerator driven sub-critical system[J]. Chinese physics c,2016,40(7):7. |
| APA | Zhao, Qiang.,He, Zhi-Yong.,Yang, Lei.,Zhang, Xue-Ying.,Cui, Wen-Juan.,...&Xu, Hu-Shan.(2016).Monitoring method for neutron flux for a spallation target in an accelerator driven sub-critical system.Chinese physics c,40(7),7. |
| MLA | Zhao, Qiang,et al."Monitoring method for neutron flux for a spallation target in an accelerator driven sub-critical system".Chinese physics c 40.7(2016):7. |
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来源：中国科学院大学
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