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磁驱动加载技术通过脉冲功率源将超大脉冲电流加载到实验负载区,从而形成随时间平滑上升的磁压力,实现对样品的准等熵压缩和超高速飞片发射.本文基于聚龙一号装置的输出特性参数,依次从负载结构、电极尺寸、电流波形和诊断系统等方面,分别设计完成了两种负载构型的超高速飞片发射实验.其中应用单侧带状负载发射尺寸Φ10 mm×0.725 mm的LY12铝飞片速度达到11.5 km/s,磁驱动加载压力近0.9 Mbar.比较模拟计算与实验结果,飞片发射过程和最终速度基本一致.而进一步的模拟计算表明,优化的负载结构尺寸和电流波形调节方案下,将有望发射尺寸Φ8.5 mm×1 mm的铝飞片速度超过15 km/s.从模拟设计到实验开展,已初步掌握了基于多支路脉冲功率发生器的超高速飞片发射实验技术.
Magnetically driven loading technology through the pulsed power source will be large pulse current loaded to the experimental load zone, thus forming a smooth rise in magnetic pressure over time to achieve the sample quasi-isentropic compression and ultra-high-speed fly-shots.This paper based on Julong One device The output characteristics parameters of the two load configurations were designed respectively in terms of load structure, electrode size, current waveform and diagnostic system, etc. The application of unilateral belt-shaped load launch size Φ10 mm × 0.725 mm LY12 aluminum flying speed reached 11.5 km / s, magnetic drive loading pressure of nearly 0.9 Mbar.Compared with the simulation results and experimental results, the fly-off process and the final velocity are basically the same, and further simulation shows that the optimized load structure Size and current waveform adjustment scheme, it is expected that the flying speed of aluminum flyer with the size of Φ8.5 mm × 1 mm will exceed 15 km / s.From the simulation design to the experiment, we have initially mastered the multi-branch pulse power generator Ultra-high-speed flying film launch experimental techniques.