氘-氘等离子体聚变中子Generator特性研究
Characterization of a Deuterium-Deuterium Plasma Fusion Neutron Generator
摘要：
我们描述了由NSD/Gradel-Fusion公司制造的35-DD-W-S型氘-氘等离子体聚变中子发生器的中子输出特性。测得的能谱被发现占主导地位的中子峰在2.2 MeV和2.7 MeV。详细的GEANT4模拟准确地再现了测量的能谱，并证实了我们对该发生器中聚变过程的理解。此外，在~$3.5\%$的水平上发现来自氘-氚聚变的14.1 MeV中子的贡献，来自先前的氘-氘反应中产生的氚。我们已经测量了绝对中子通量以及它的相对变化的操作参数的发生器。我们发现磁通量与电压$V^{3.32 \pm 0.14}$和电流$I^{0.97 \pm 0.01}$成正比。此外，我们已经测量了中子发射的角度依赖性相对于极角。我们的结论是，它是很好地描述了各向同性生产的阴极场笼内的中子。
英文摘要：
We characterize the neutron output of a deuterium-deuterium plasma fusion neutron generator, model 35-DD-W-S, manufactured by NSD/Gradel-Fusion. The measured energy spectrum is found to be dominated by neutron peaks at 2.2 MeV and 2.7 MeV. A detailed GEANT4 simulation accurately reproduces the measured energy spectrum and confirms our understanding of the fusion process in this generator. Additionally, a contribution of 14.1 MeV neutrons from deuterium-tritium fusion is found at a level of~$3.5\%$, from tritium produced in previous deuterium-deuterium reactions. We have measured both the absolute neutron flux as well as its relative variation on the operational parameters of the generator. We find the flux to be proportional to voltage $V^{3.32 \pm 0.14}$ and current $I^{0.97 \pm 0.01}$. Further, we have measured the angular dependence of the neutron emission with respect to the polar angle. We conclude that it is well described by isotropic production of neutrons within the cathode field cage.
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