| 双丝耦合强度对Z箍缩电磁辐射的影响 |
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| 引用本文： | 但加坤,张思群,欧阳凯,黄显宾.双丝耦合强度对Z箍缩电磁辐射的影响[J].强激光与粒子束,2016,28(1):015027. |
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| 作者姓名： | 但加坤 张思群 欧阳凯 黄显宾 |
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| 作者单位： | 1.中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621 999 |
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| 摘 要： | 利用X射线二极管、光电倍增管和B-dot探针测量了峰值220 kA,0~100%上升时间100 ns的脉冲电流驱动平行双丝产生的电磁辐射。实验结果表明，不同波段的电磁辐射具有不同的辐射机制，热辐射是产生X射线的主要机制，可见光辐射来自热辐射和特征线辐射，微波辐射由非热电磁辐射机制产生。调节丝间距可改变双丝的耦合强度，当丝间距大于临界值时双丝解耦合，电磁辐射不依赖于丝间距；当丝间隙减小至低于临界值时，双丝耦合增强。增大双丝耦合强度不利于热辐射(X射线和可见光)，而有利于非热电磁辐射(微波)。对于单丝电流约100 kA、上升时间100 ns的驱动条件，双丝解耦合的临界间距约为10 mm，双丝耦合强度对Z箍缩在不同频段的电磁辐射有影响。丝阵由多根金属丝组成，其最小的相互作用单元可分解为双丝相互作用。
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| 关 键 词： | Z箍缩 双丝耦合 非热电磁辐射 热辐射 临界丝间隙 |
| 收稿时间： | 2015-09-07 |
Influence of coupling between two wires on electromagnetic radiation produced by Z-pinch |
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| Affiliation: | 1.Key Laboratory of Pulsed Power,Institute of Fluid Physics,CAEP,P.O.Box 919-108,Mianyang 621999,China |
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| Abstract: | We have measured X-ray, optical and microwave radiations from two parallel wires driven by a current rising to 220 kA in 100 ns. The experimental results imply that they are generated by different radiation mechanism. X-ray is generated by thermal radiation which is proportional to ohmic heating of wires. Optical radiation is from thermal emission and line emission, but microwave radiation is produced by non-thermal radiation. The dependence of radiation on distance between two wires demonstrates that increasing the coupling between two wires can enhance non-thermal radiation, but is detrimental to thermal radiation. For driving condition of 100 kA per wire used in our experiments, the critical distance where the two wires decouple is approximately 10 mm. It appears that the coupling between wires plays a fundamental role in electromagnetic radiation produced by Z-pinch. |
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