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在三温聚变燃烧点模型框架下,对比氘氚聚变燃烧过程中α粒子能量逐步沉积与瞬时沉积两种描述下等离子体的温度、离子数密度随时间的变化,针对不同的密度条件做了计算,考察了α粒子慢化过程对氘氚聚变点火的影响。发现考虑了α粒子的慢化过程后,峰值温度时刻延迟出现,电子和离子的峰值温度都有所降低。在相同的初始温度条件下,α粒子的慢化效应在较低的密度条件下对点火有更大的影响。
Under the framework of the three-point fusion combustion model, the temperature and ion number densities of the plasma under two kinds of description of the gradual deposition and transient deposition of alpha particles in the process of fusion of deuterium and tritium were compared and calculated for different densities The effect of α particle moderation on the fusion of deuterium, tritium and fusion was investigated. After considering the slowing down of α particles, the delay of the peak temperature appears and the peak temperatures of electrons and ions decrease. Under the same initial temperature conditions, the moderating effects of alpha particles have a greater impact on ignition at lower densities.