Technology of Filling Hollow Glass Microsphere With D₂/Ne

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.