不同氩气气压下铝丝电爆炸的二次放电特性

Second discharge characteristics of aluminum wire electrical explosion under various argon pressures

搭建了RLC放电回路,研究了不同氩气气压下铝丝电爆炸二次放电特性。结果表明,随着气压的变化,电爆炸二次放电电压曲线呈U形。为了阐明氩气和铝蒸气在二次放电过程中的作用,利用光谱仪和高速分幅相机分别研究了二次放电等离子体的自辐射光谱特性和空间分布特性,发现:在低气压下氩气会参与放电,放电通道在铝蒸气表面;高气压下主要是铝蒸气放电,氩气基本不参与放电过程,放电通道在铝蒸气内部。

The second discharge characteristics of aluminum wire electrical explosion under various argon pressures were studied in a RLC discharge circuit. The results show that the curve of second discharge voltages by exploding aluminum wire presents a U-shape as the pressure changes. The spectrometer and high speed framing camera were used to study the radiation spectrum and spatial distribution of the electrical explosion plasma to clarify the roles of aluminum vapor and argon in the process of second discharge. It is found that argon participates in discharge process with the discharge channel along the surface of aluminum vapor at lower pressure, while the second discharge happens in aluminum vapor with the discharge channel inside aluminum vapor under higher pressure.