氦、氢、氮空心阴极放电的真空紫外辐射特性

VUV radiation characteristics of a hollow cathode discharge in He, H_2, and N_2 gas

介绍了一种水冷、陶瓷封接结构的空心阴极放电装置.研究了He、H_2、N_2在120nm～20Onm范围内该装置的真空紫外辐射特性,获得了100～600mA电流范围内的辐射强度与放电电流的关系,以及充气气压变化对它的影响.实验表明:在实验条件下,主要发射谱线为氮的原子线和氦的离子线;辐射谱线强度在0.03～0.72mW·cm^(-2);气压改变时,N_2、H_2辐射强度有一极大值,而He的离子线辐射强度则出现二个极大;在He/H_2混合气体放电时,随着He的加入,氢分子带光谱有明显下降.

Using a ceramic-sealed and water cooled hollow cathode D. C. discharge setup, vacuum ultraviolet (VUV) spectral radiations in range of 120-200nm for the He H2 and N2 gases have been investigated. The relative radiation intensity as a function of the discharge current (100-600mA) and the influence of the gas pressure on it have been shown. This experiment shows that the VUV line radiation belongs to the helium ion and nitrogen atom. It was found that there is only one maximum value in the hydrogen line radiation with the variation of the H2 gas pressure, but in the He II line radiation there are two maximum values with the variation of the Helium gas pressure. An obvious decrease of the radiation output for H2 band spectrum has appeared with an addition of He in H2 gas.