Author:
Ma Baolong,Yan Mingfei,Li Xiaobo,Jiang QuanXu,Wang Sheng,Liu Zhihua
Abstract
Abstract
Deuterium-Deuterium (D-D) neutron source, which could be
used in both laboratory and outdoors due to its light weight, small
volume and low cost, has been widely applied in thermal neutron
imaging (TNI) and prompt gamma-ray neutron activation analysis
(PGNAA). And the its optimization design is to obtain highly intense
thermal neutrons and low dose rate around the facility with light
weight and compact volume. In this paper, the genetic algorithm (GA)
combined with MCNP6 was applied to globally optimize moderator,
reflector, and shielding structures. As a result, the optimized
thermal neutron intensity increased by 1.68 times, while the dose
rate, weight and volume respectively decreased by 37%, 52%, and
27%, compared with the data based on the current design. This
method could be an effective tool for the compact neutron source
design.
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