摘要
为了解中国散裂中子源(CSNS)及其输出中子的能量分布等相关信息,利用MCNP程序模拟中子的慢化和输运过程,计算不同情形下的输出中子能谱。结果表明,在退耦合窄化氢(DPHM)中的窄化片向下束流方向(downstream)偏移5 mm时能有效窄化输出的能谱峰,并最大限度减少退耦合氢慢化器的输出中子对退耦合水慢化器输出中子的干扰。
Neutron moderation and neutron transport in target-moderator-reflector (TMR) system of China spallation neutron source (CSNS) were simulated by using MCNP code. Neutron energy spectra and angular distributions were calculated using different sets of parameters. The results show that placing the poison in the center of decoupled poisoned hydrogen moderator (DPHM) with a deviation of 5 mm to the downstream window can optimize the design.
出处
《核技术》
CAS
CSCD
北大核心
2011年第12期921-925,共5页
Nuclear Techniques