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在气泡内爆的圆形和刀刃状阴极的比较

J C Valenzuela¹, M Escalona¹, O Loch¹

¹Pontificia Universidad Catolica de Chile, Santiago 7820436, Chile.

Physical review. E

|September 19, 2023

概括

这项研究研究了阴极几何学对气体膨胀Z-pinch爆破可重现性的影响. 与圆形阴极相比,刀尖阴极增强了电流可重现性和质量压缩,尽管存在耐用性问题.

科学领域:

等离子体物理学的物理学
脉冲动力科学脉冲动力科学
核聚变能源研究研究

背景情况:

预离子化显著影响气体膨胀Z-pinch爆炸.
外部预电离源提高了可重现性,但自我分解缺乏镜头对镜头的一致性.
这项研究侧重于使用不同阴极几何形状的自我分解机制.

研究的目的:

系统地研究阴极几何学对气体膨胀Z-pinch自分解的影响.
为了比较光滑,圆形阴极与尖,刀尖阴极的可复制性和性能.
分析阴极设计对爆破动态和X射线产量的影响.

主要方法:

在Llampudken电流发生器 (∼400kA,200ns上升时间) 上进行的实验.
使用了两个阴极几何形状:光滑的圆形和利的刀刃.
采用封闭的XUV成像,过的二极管和时间集成的X射线成像用于诊断.

主要成果:

刀尖阴极提供了更可复制和更高的峰值电流.
尽管圆形阴极的X射线产量可能更高,但其分散率是圆形阴极的两倍.
雪模型分析表明,与圆形阴极相比,刀尖阴极的质量压缩明显更高 (∼60%),而圆形阴极 (∼20%).

结论:

阴极几何学极大地影响了气泡Z-pinch的可重现性和性能.
刀尖阴极显著提高了实验的可复制性,而不是圆形阴极.
优化阴极设计对于实现可控和高效的Z-pinch爆破至关重要.

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