Monte Carlo Simulations for High-rate Fast Neutron Flux Measurements Made at the RAON Neutron Science Facility by Using MICROMEGAS
- Authors
- 황대희; 홍서기; 김재천; 김기동; 김용균
- Issue Date
- Oct-2015
- Publisher
- 한국물리학회
- Keywords
- MICROMEGAS; Monte Carlo simulation; Neutron flux
- Citation
- Journal of the Korean Physical Society, v.67, no.8, pp.1315 - 1318
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- Journal of the Korean Physical Society
- Volume
- 67
- Number
- 8
- Start Page
- 1315
- End Page
- 1318
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/156175
- DOI
- 10.3938/jkps.67.1315
- ISSN
- 0374-4884
- Abstract
- 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, )t and 10B(n, )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.
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