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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.
A fast time-resolved neutron flume detection system composed of BF3 and 3He proportional counter tubes was used to measure the photons of neutron and neutron neutrons in deuterium plasma of HT-7 superconducting tokamak The typical characteristics of neutron fluence signals evolving with time are analyzed in the experiments of pure ohmic discharge and low noise auxiliary heating discharge.The results show that HT -7 A significant number of deuterium-deuterium (DD) fusion neutrons can be produced when high-power, low-noise, auxiliary-heating plasma discharges are introduced.