Effect of surface insulation on early stage of tungsten planar wire array Z-pinch
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摘要: 在强光一号装置上研究了表面绝缘对平面钨丝阵早期过程的影响。通过对实验结果的唯象分析，发现相对于标准丝阵，表面绝缘丝阵X射线辐射被强烈延迟，并与丝阵宽度有较强的依赖关系，在X射线辐射之前存在较强的阴极发射；表面绝缘丝阵X射线辐射副脉冲幅值是标准丝阵两倍，且存在较长的平台期，其单丝等离子体膨胀导致的温度降低效应比标准丝阵强；在快速内爆开始之前，两者形成了类似的宏观磁流体不稳定性结构。Abstract: The effect of surface insulation for the tungsten planar wire arrays was studied on QiangGuang-Ⅰ facility. Utilizing the phenomena analysis, the X-ray radiation of the surface insulated wire arrays (SIWA) is considerably delayed and the delay time is dependent upon the width of the wire array. Strong cathode emission is also observed in the SIWA Z-pinch experiments. The amplitude of X-ray plateau before the main pulse in the SIAW experiments is 2 times of that in the standard wire array (SWA) experiments. The duration of the X-ray plateau of the SIAW is longer than that of SAW. The cooler effect due to the single wire plasma expansion in SIAW experiments is much stronger compared with that in SAW experiments. The similar macro magneto hydrodynamics instability structure is observed in both SIAW and SAW experiments.
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Key words:
- surface insulating /
- tungsten planar wire array /
- Z-pinch /
- early stage
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