氘中性束注入到EAST内的中子产额分析

Analysis of fusion neutron production in EAST with neutral beam injection

利用典型离子模型和解析方法估算了氘中性束注入到先进超导托卡马克装置（ExperimentalAdvancedSuperconductingTokamak，EAST）等离子体内的中子产额。分析了聚变中子与EAST等离子体内中心离子密度、中心离子温度及注入氘中性束能量、注入功率等参数的关系。计算结果表明，当EAST运行在典型放电参数下，能量为80keV、功率为4MW的氘中性柬注入时，EAST等离子体总聚变中子产额为-10^16n·s^-1，是热核聚变中子产额10^15n·s^-1的10倍。本文的计算结果可为制定中子辐射防护措施和EAST发展新的中子探测技术提供参考。

The neutron emission rate increases rapidly with high-power deuterium beam injected into deuterium plasmas. It is necessary to calculate the neutron production in Experimental Advanced Superconducting Tokamak （EAST） for the radiation safety. Purpose： We aim to provide reference for developing new detection systems of fusion neutron and neutron radiation shielding design. Methods： Neutron emission rate was calculated using the typical particle model and analysis method. The relationships were analyzed among the fusion neutron production and the ion density, ion temperature, neutral beam energy and neutral beam power respectively. Results： The results demonstrated that the total fusion neutron production was 1016 n＇s-1 with 80-keV, 4-MW neutral beam injection. Conclusion： Neutron intensity in EAST will increase by a factor of ten when appropriate neutral beam injection is applied. It can be referred for fiLrther performance improvement and radiation protection of EAST.