Abstract:

The purpose of this paper was to describe hollow plastic microspheres filling with D2 which served as inertial confinement fusion（ICF）targetsThe microspheres were 300 μm in diameter and were composed of three layers：PS with 5—7 μm wall thickness，PVA with 3—5 μm and CH with 4—6 μmThe primary experiments showed that the equilibrium time was 20—40 h at 50℃，while 7—12 h at 70℃ and 2—4 h at 90℃The equilibrium time increased by about 10 times from 90℃ to 50℃The deuterium permeability of hollow plastic microspheres was （3.0—4.2）×10^-19 mol·m^-1·s^-1·Pa^-1 at room temperature（25℃）.This corresponded to the half time for D2 retention to be about 28—37 h.

摘要：

研究了激光惯性约束聚变靶用PS-PVA-CH三层塑料空心微球采用热扩散法高温高压充氘气技术。实验研究表明，对于直径300 μm、PS壁厚5～7 μm、PVA壁厚3～5 μm、CH层厚4～6 μm的塑料微球，50℃充气的平衡时间为20～40 h，70℃的平衡时间为7～12 h，90℃的平衡时间为2～4 h。在室温25℃时，微球的气体渗透系数为（3.0～4.2）×10^-19 mol·m^-1·s^-1·Pa^-1，对应的保气半寿命为28～37 h。对于参数接近的微球，如果充气时间相同，充气外压与微球内压基本呈正比。当外压达到6.0 MPa时微球开始出现破损。