Ar在玻璃微球中的辐照增强扩散效应研究

 为满足惯性约束聚变实验诊断的需求，需要在空心玻璃微球内充入DT燃料气体的同时充入一定量的Ar诊断气体，由于Ar原子尺寸较大，一般热扩散技术难以实现对玻璃微球充Ar。为解决充Ar问题，研究了不同反应堆中子注量对玻璃微球的改性作用。测试结果表明：当中子注量达到1×10¹⁸ cm^-2时，在500 ℃和室温情况下都可以向玻璃微球内充入Ar。辐照增强扩散后的扩散系数高于3.6×10^-13 cm²/s。

Radiation enhance diffusion of Ar into hollow glass microsphere

For the demands of inertial confinement fusion experiments, DT fuel gas and some diagnostic gases such as Ar should be filled into hollow glass microsphere(HGM). However, Ar could not be filled into HGM by means of usual thermal diffusion due to its big atomic size. In this article, neutron radiation was used to create defects in HGM to let Ar enter HGM based on radiation enhancing diffusion. The experimental results show that Ar can be filled into HGM at 500 ℃ and room temperature when the neutron dosage is up to 1×1018 cm-2. The diffusion coefficient after irradiation enhances to Dcav≥3.6×10-13 cm2/s。