Monte Carlo simulations for high-rate fast neutron flux measurements made at the RAON neutron science facility by using MICROMEGAS

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• 作者：Dae Hee Hwang ; Ser Gi Hong ; Jae Cheon Kim…
• 关键词：MICROMEGAS ; Monte Carlo simulation ; Neutron flux
• 刊名：Journal of the Korean Physical Society
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：67
• 期：8
• 页码：1315-1318
• 全文大小：985 KB
• 参考文献：[1]RAON Accelerator and Experimental System Technical Design Report (Volume 4, v1.1), Institute for Basic Science, 2013.
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  [7]I. Papadopoulos et al., Nuclear Science Symposium Conference Record, 2000 IEEE (Volume: 1), (IEEE, Lyon, 2000), p. 5.
  
• 作者单位：Dae Hee Hwang (1)
  Ser Gi Hong (1)
  Jae Cheon Kim (2)
  Gi Dong Kim (2)
  Yong Kyun Kim (2)
  
  1. Department of Nuclear Engineering, Kyung Hee University, Yongin, 17104, Korea
  2. Institute for Basic Science, Daejeon, 34047, Korea
  
• 刊物主题：Physics, general; Theoretical, Mathematical and Computational Physics; Particle and Nuclear Physics;
• 出版者：Springer Netherlands
• ISSN：1976-8524

文摘

RAON is a Korean heavy-ion accelerator complex that is planned to be built by 2021. Deuterons (53 MeV) and protons (88 MeV) accelerated by using a low-energy driver linac (SCL1) are delivered to the neutron production target in the Neutron Science Facility (NSF) to produce high-energy neutrons in the interval from 1 to 88 MeV with high fluxes of the order of 1012 n/cm2-sec. The repetition rate of the neutron beam ranges from 1 kHz to 1 MHz, and the maximum beam current is ~12 μA at 1 MHz. The beam width is 1 ~ 2 ns. The high-energy and high-rate fast neutrons are used to estimate accurate neutron-induced cross sections for various nuclides at the NSF. A MICROMEGAS (MICRO Mesh Gaseous Structure), which is a gaseous detector initially developed for tracking in high-rate, high-energy physics experiments, is tentatively being considered as a neutron beam monitor. It can be used to measure both the energy distribution and the flux of the neutron beam. In this study, a MICROMEGAS detector for installation at the NSF was designed and investigated. 6Li, 10B, 235U and 238U targets are being considered as neutron/charged particle converters. For the low-energy region, 6Li(n,α)t and 10B(n,α)7Li are used in the energy range from thermal to 1 MeV. 235U(n,f) and 238U(n,f) reactions are used for high-energy region up to 90 MeV. All calculations are performed by using the GEANT4 toolkit.