平行面多金属钨丝Z箍缩实验研究
Experimental study of parallel multi-tungsten wire Z-pinch
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摘要: 利用“阳”加速器对平行面多金属钨丝（直径17 μm，丝间距1 mm，丝数3根或5根）负载进行了Z箍缩聚爆实验研究。在峰值为350 kA,上升沿约80 ns的电流作用下，使用针孔成像技术和X射线诊断技术，获得多钨丝等离子体融合图像及相应的软X射线辐射信号。对金属丝聚爆过程中负载电流变化对实验影响进行了分析，并探讨了引起聚爆过程中的等离子体柱腊肠型不稳定性、扭曲型不稳定性和“热点”及其周围弥散斑等现象的原因。Abstract: The study of three parallel tungsten wire loads and five parallel tungsten wire loads implosion experiment on accelerator “Yang” are reported. Tungsten wires (17 μm) with separation of 1 mm were used. The pinch was driven by a 350 kA peak current, 80 ns 10%~90% rise time. By means of pinhole camera and X-ray diagnostics technology, a non-uniform plasma column is formed among the wires and soft X-ray pulse are observed. The change of load current are analyzed, the development of sausage instability and kink instability, “hot spot” effect and dispersion spot for plasma column are also discussed.
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Key words:
- tungsten wire /
- load current /
- plasma /
- hot spot /
- soft x-ray
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