空心玻璃微球D<SUB>2</SUB>/Ne混合气体充气工艺

空心玻璃微球D₂/Ne混合气体充气工艺

摘要: 本工作主要研究空心玻璃微球对D₂和Ne气体渗透系数的差异，以及研究采用热扩散法在高压充气系统上向空心玻璃微球充入D₂/Ne混合气体的充气工艺。利用干涉条纹法测量了在充气和保气时Ne的气体渗透系数，它们分别为K_{Ne,350 ℃}=2.6×10^-18和K_{Ne,25 ℃}=8.0×10^-22 mol•m^－1•s^－1•Pa^－1。根据D₂的气体渗透系数确定了玻璃微球充D₂/Ne混合气体的充气方法和充气平衡时间，平衡时间以充纯Ne时间为准。此外，还研究了空心玻璃微球充入混合气体后的保气性能。

Abstract: The hollow glass microsphere(HGM) is one of targets used in inertial confinement fusion(ICF) experiments,and it is filled with the fuel gas and the diagnosis gas, such as mixture of D₂ and Ne. In order to control the D₂-Ne ratio of mixed gas and total pressure in the HGM, the Ne permeability and the permeability difference between Ne and D2 in the HGM are studied. The primary experiments show that Ne permeability is 2.6×10^－18 and 8.0×10^-22 mol•m^－1•s^－1•Pa^－1 at 350 and 25℃, respectively. It is concluded that D₂/Ne filling time is determined by the Ne permeability because the Ne permeability is small at 350 ℃. On the basis of these experiments， the HGM was filled with the mixture of D₂ and Ne.