Ultrahigh-speed simultaneous framing and streak photography of magnetic flux compression by explosive cylindrical implosion
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摘要: 叙述了超高速同时分幅/扫描摄影技术在柱面内爆磁能量压缩实验中的研究应用，用自研的国内首台同时分幅/扫描超高速光电摄影系统，拍摄到柱面内爆强磁场压缩过程同一时基、同一空基且具有超高时空分辨的一维和二维清晰图像。成功观察到柱面套筒内爆整个压缩过程，获得了该过程直径随时间变化曲线及压缩速度。实验结果表明，柱面套筒内爆强磁场压缩过程中存在界面不稳定性和不对称性现象，整个过程压缩时间8～10 s，压缩速度3.8～4.5 km/s。
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关键词:
- 柱面内爆 /
- 磁通量压缩 /
- 高速摄影 /
- 同时分幅/扫描光电相机
Abstract: In this paper, we applied the utility of ultrahigh-speed simultaneous framing and streak photography technology in the experiment of magnetic flux compression by cylindrical implosion. For the first time, we obtained the spatio-temporal 1D and 2D images of compression process of magnetic field with high temporal and spatial resolutions using ultrahigh-speed simultaneous framing and streak photography techniques. We observed the whole compression and rebound process. Curves of diameter change with time and the compression speed were obtained. The experiment results shows that the compression process had interface instability and asymmetry phenomena, the whole compression time was 8-10 s, and the whole compression speed was 3.8-4.5 km/s. -
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