The enhancement of the fusion reaction rate coefficient induced by energetic protons, which is one of the typical nuclear elastic scattering (NES) effects, was observed in the large helical device (LHD) located at the National Institute for Fusion Science. An intense high purity hydrogen beam (the atomic ratio of the contained deuterium was less than 1 ppm) with ∼170 keV-energy and ∼10 MW-power was injected into a deuterium plasma with the electron temperature ∼9 keV and density ∼10¹⁹m⁻³. After the hydrogen beam injection, the neutron generation rate by the D(d,n)³He fusion reaction immediately increased, and an increment of over one order of magnitude was observed, even though there was no meaningful ion temperature variation. The reasons for the increment in the neutron generation rate are discussed with reference to the Boltzmann–Fokker–Planck analysis along with LHD experimental data. It is concluded that the increment was induced by the production of energetic deuterons due to the NES of energetic protons.

在位于美国国立聚变科学研究所的大型螺旋装置 (LHD) 中观察到由高能质子引起的聚变反应速率系数的增强，这是典型的核弹性散射 (NES) 效应之一。将具有约 170 keV 能量和约 10 MW 功率的高纯度氢束（所含氘的原子比小于 1 ppm）注入电子温度约 9 keV、密度约 10 ¹⁹的氘等离子体中米^-3。注入氢束后，中子产生率由 D(d,n) ³He 聚变反应立即增加，并观察到超过一个数量级的增加，即使没有有意义的离子温度变化。参考 Boltzmann-Fokker-Planck 分析以及 LHD 实验数据讨论了中子产生率增加的原因。得出的结论是，由于高能质子的 NES，高能氘核的产生引起了增加。