Effect of light irradiation on Townsend breakdown in gaseous and supercritical helium at 5.2 K
Effect of light irradiation on Townsend breakdown in gaseous and supercritical helium at 5.2 K
复制标题
5.2 K 下光照射对气态氦和超临界氦中 Townsend 击穿的影响
DOI：
10.1088/0963-0252/23/1/012002
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发表时间：
2014
影响因子：
3.8
通讯作者：
and K. Terashima
中科院分区：
文献类型：
--
作者：
D. A. Lacoste;H. Muneoka;T. F. Guiberti;D. Z. Pai;K. Urabe;S. Stauss;and K. Terashima
我们报告了一个实验研究的光照射效应的汤森击穿机制的等离子体放电在氦气中，在5.2 K，密度高达23 mol l-1。等离子体放电是在针-平面电极几何结构中产生的，由5 µm的间隙距离隔开。针电极是阴极。使用波长为365和635 nm的两个光源。研究了压力和光通量对激光器的影响。在此基础上，提出了光辐照对击穿机理影响的唯象解释。电子的光子增强场致发射可能具有显著的重要性。
We report an experimental investigation of the light irradiation effect on the Townsend breakdown mechanism of plasma discharges in helium, at 5.2 K, for densities up to 23 mol l− 1. The plasma discharges were generated in a pin-to-plane electrode geometry, separated by a gap distance of 5 µm. The pin electrode was the cathode. Two light sources, with wavelengths of 365 and 635 nm, were used. The influence of the pressure and the light flux was studied. Based on the results, a phenomenological interpretation of the effect of light irradiation on the breakdown mechanism is proposed. Photon-enhanced field emission of electrons could be of significant importance.