单壳层喷气Z箍缩内爆特性分析

Implosion characteristics of gas-puff Z-pinch with a single-shell nozzle

在"阳"加速器(电流峰值为500—850kA,上升时间约为85ns)上利用单壳层喷气负载开展了Z箍缩等离子体内爆实验,获得了等离子体的辐射产额、X光辐射图像等诊断结果.利用相应的诊断结果,定义了内爆时间,对内爆过程的主要阶段进行了划分,研究了等离子体位形、辐射强度分布等实验现象,同时对等离子体的内爆轨迹、内爆质量、径向收缩比、磁流体不稳定性等进行了初步分析.

Single-shell gas-puff Z-pinch experiments were performed on ＂Yang＂ accelerator（peak current 500—850 kA,rise time ～85 ns）.The x-ray power and yield,the time-resolved and time-integrated images of plasma implosions were measured.Based on the corresponding diagnostics,the implosion time was defined and the implosion process was divided into four stages.the initial plasma status and the distribution of radiative intensity were studied.In addition,the implosion trajectories,load mass, radial convergence and magneto- Rayleigh-Taylor （MRT） instability were analyzed.