Time-resolved observation of the change of electrode shape in single discharge: Rapid self-forming of a thin electrode
Time-resolved observation of the change of electrode shape in single discharge: Rapid self-forming of a thin electrode
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DOI：
10.1063/1.1855398
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发表时间：
2005-02
影响因子：
3.2
通讯作者：
R. Tanabe;Yoshiro Ito;H. Takezawa;N. Mohri
中科院分区：
文献类型：
--
作者：
R. Tanabe;Yoshiro Ito;H. Takezawa;N. Mohri
通过一次相当高的放电电流放电，可以在薄钨电极的尖端形成非常薄的针状电极。我们已经证明了这种非常薄的电极的一些实际适用性。了解这种电极的形成机制是将这种现象应用于实际应用的一个重要问题。我们应该看看放电期间电极上发生了什么。在这项研究中，通过高时间分辨率的频闪成像系统动态观察了大电流单次放电引起的薄金属电极尖端部分电极形状的变化。成像系统中采用调Q钕：钇铝石榴石激光器的二次谐波为电荷耦合器件相机照明，可拍摄时间分辨率约为10ns的照片。电极材料为直径100μm的钨和铜，放电电流为30A，持续时间400μs。电的正负极性都...
A very thin, needlelike electrode can be formed at the tip of thin tungsten electrode by a single discharge with rather high discharge current. We have demonstrated some practical applicability of such very thin electrode. Understanding the formation mechanism of such electrodes is an important issue to utilize the phenomenon to practical applications. We should see what happens on the electrode during the discharge. In this study, the change of electrode shape at tip part of a thin metal electrode induced by single discharge with a large current was observed dynamically by a stroboscopic imaging system with high time resolution. In the imaging system, the second harmonics of a Q-switched neodyum: yttrium-aluminum-garnet laser is used for lighting of charge-coupled device camera and it can take a photo with time resolution of about 10ns. Electrode materials were tungsten and copper of 100μm diameter and the discharge current was 30A with 400μs duration. Both the positive and negative polarities of electro...