无源柱腔充气靶制备技术

Fabrication of gas-filled targets without gas source

分析了柱腔充气靶动态充气、准动态充气和静态充气3种充气方式的特点,完成了无源充气靶的设计和制备,测量了无源充气靶的保气半寿命,讨论了靶的储存和运输。研究表明:充Kr的玻璃柱腔充气靶保气半寿命不低于341 h,以打靶时间为3 h计算,靶内气体泄漏率不超过2%;采用高压保气罐对成品进行储存和运输,无源柱腔充气靶可实现异地打靶。

The gas-filled hohlraum targets is one of the most important targets in the inertial confinement fusion experiments. There are three ways to fill the hohlraum with necessary gases： filling gas at the same time of or before the shot, or before the experiment. This paper focused on the fabrication of gas-filled targets without gas source. Based on the design of the targets assembly, a seris of gas-filled targets were finished, whose hohlraum materials were Au, plastic and glass. Experiments show that the half life time of the target is no less than 341 hours for Kr-filled glass hohlraum, and the amount of leaded gas is no more than 2% of the total gas in the target within 3 h. Remote-place shooting could be realized by keeping the finished target in a high pressure gas-retention tank during transportation.