HT-7上氘等离子体放电时中子注量的测量与分析

利用三氟化硼（BF₃） 和氦三（3He）正比计数管组成的快速时间分辨中子注量探测系统，对HT-7超导托卡马克上氘等离子体放电时光中子和聚变中子的产生机理进行研究.结合γ射线、硬X射线等相关诊断的实验结果，分析了纯欧姆放电和低杂波辅助加热放电时，中子注量信号随时间演化的典型特征.结果表明：HT-7在投入大功率低杂波辅助加热等离子体放电时，能够产生数量可观的氘-氘（D-D）聚变中子. 关键词： 中子注量 聚变中子 光中子 托卡马克

Neutron flux measurement and analysis in the HT-7 deuterium plasma

Fusion neutron and photon neutron producing behavior in the deuterium plasma discharge have been studied on HT-7 superconductive tokamak device by BF₃ and 3He proportional ionization chamber implementing the fast time respond neutron flux measurement system. Typical time resolved neutron flux signals have been analyzed in connection with gamma and hard X-ray diagnostic data in the cases of ohmic discharge and lower hybrid wave discharge. Data analysis show that many neutrons are produced by D-D fusion reaction when high-power lower hybrid wave was employed to heat the plasma.