部分单元素空心阴极灯的发射光谱研究

报道了13种元素的19支单元素空心阴极灯(HCL)的发射光谱。发现部分元素的空心阴极灯发射线与其他元素的共振线或非共振线存在谱线重叠现象。对产生这一现象的原因作了初步探讨。提出这些单元素灯在理论上可用于多个元素的测定,并且可用作多元素同时测定原子吸收分光光度计的光源。     

HCD-Ⅱ型空心阴极光源故障诊断及排除

介绍了北京航空材料研究院研制生产的HCDⅡ-型空心阴极光源摄谱后短波波长的As不出现的故障排除及解决措施。     

用空心阴极光源标定极紫外-软X射线单色仪

为了使单色仪在极紫外-软X射线波段准确地进行波长扫描,需要对单色仪进行波长标定。单色仪的所有组件都放置在罗兰圆的圆周上,改变出射狭缝在罗兰圆上的位置,在单色仪的出射狭缝处就可以得到相应波长的单色光。通过测量标准He空心阴极光源的发射光谱,对Mcpherson247单色仪进行波长标定,并对实验结果进行了分析,得出在1~100nm波段内单色仪标定精度为±0.017nm~±0.097nm。     

铀空心阴极放电灯的光谱特性研究

本文报道了利用自制铀空心阴极放电灯进行U发射光谱的测量研究.通过一系列铀空心阴极放电灯光谱特性参数的测量,分析了作为光谱测量用的铀空心阴极放电灯的最佳工作参数.并且报道了我们测量的部分U原子发射光谱的发射强度和gf数.     

空心阴极等离子体电子枪研究

对空心阴极等离子体电子枪的理论与机理做了较详细的分析，介绍了空心阴极放电特性，论 述了激励电极和调制电极在空心阴极内等离子体形成过程中的作用，分析了等离子体中电子 和离子的运动及主要参数，推导出空心阴极内电场与电流密度的表达式，研究了形成稳定电 子束流的基本条件.利用泊松方程、电流连续性方程和运动方程对其进行了数值模拟计算， 并给出了优化结果. 在此基础上设计出了输出束流脉宽为1μs、幅值达2kA的空心阴极等离 子体电子枪. 关键词： 空心阴极 等离子体 电子枪     

氢化物发生原子荧光光谱分析中的微秒脉冲供电空心阴极灯激发光源

利用实验室研制的大电流微秒脉冲(HCMP)电源对As,Se,Sb,Pb空心阴极灯(HCL)供电,研究了HCMP-HCL的发射光谱、电学性质、荧光光谱,评估其作为氢化物发生原子荧光光谱(HG-AFS)激发光源的可行性。HCMP供电As,Se,Sb,Pb HCL可在脉冲频率100～1 000 Hz、脉冲宽度4.0～20 μs、最大峰值电流4.0 A下维持稳定放电;研究了HCMP-HCL特征谱线发射强度与脉冲电流、供电电压、脉冲频率、脉冲宽度等供电参数之间的关系;与目前商品常规脉冲供电(CP)的HCL相比,HCMP-HCL的供电脉冲宽度更窄、峰值电流更高。在优化的HCMP供电参数下,As,Se,Sb HCL发射光谱中的原子线强度有较大幅度提高,可能用作HG-AFS新型激发光源,而Pb HCL发射光谱中的离子线强度增强、原子线强度降低,不适合做HG-AFS激发光源。以HCMP供电As,Se,Sb HCL为激发光源的HCMP-HCL是一种极有发展前景的HG-AFS新型激发光源。     

A Modified Version of the Grimm's Glow Discharge Lamp for Use as a Demountable Hollow Cathode Emission Source. V. Determination of Minor Constitutents and Trace Elements in Steel

The applicability of the modified hollow cathode emission source to the determination of some elements usually contained in steel was tested in the case of chromium (0.144 – 3.07%), copper (0.090 – 0.49%), manganese (0.016 – 1.42%), molybdenum (0.007 – 1.41%), nickel (0.048 – 5.15%, silicon (0.013 – 0.81%), and vanadium (0.034 – 0.64%). The linearity of the calibration curves was found to be highly satisfactory, the Bravais - Pearson correlation coefficient ranging from 0.97 to 0.99. Moreover, results showed that background intensity is negligible and that blackening values can be plotted without resorting to internal standards or other preliminary corrections.     

A Modified Version of the Grimm's Glow Discharge Lamp for Use as a Demountable Hollow Cathode Emission Source. II. The Current Intensity-Voltage Characteristic Curves

The dependence of resulting voltage on applied current intensity in a modified commercially available hollow cathode lamp is determined in the case of aluminium, copper and graphite cathodic materials in an extended range of argon carrier gas pressures and for five different cathode - anode distances. Experimental results show that the modified emission source affords high stability discharge in a wide range of experimental parameters.     

A Modified Version of the Grimm's Glow Discharge Lamp for Use as a Demountable Hollow Cathode Emission Source. III. Blackening as a Function of Discharge Parameters

Abstract

The influence of anode distance from hollow cathode on the blackening? of spectral lines excited by means of the modified Grimm's lamp was investigated for three representative cathodic materials, i.e. aluminium, copper and graphite using argon as the carrier gas. On the basis of the experimental results as well as voltage-current characteristic curves at distances of 7, 15, 20, 25 and 33 mm, it was possible to conclude that the optimal sets of discharge parameters for all the materials investigated are based on an electrode distance of 20-25 mm. In the case of copper a distance of 33 mm was also found to be highly suitable. An increase in the emission of copper lines at the largest anodic length with increasing pressure of the noble gas was also observed, in contrast with the behavior of the same element at shorter distances. A tentative interpretation of the phenomenon is given.     

Comparative Investigations on the Reproducibility of the Hollow Cathode,Glow Discharge and Spark Light Sources

A comparison between the constancy and reproducibility of the hollow cathode, glow discharge and spark light sources was carried out. Samples of pure copper as well as of commercial brass and steel were investigated. Results show that the hollow cathode produces a better reproducibility of the measurements in all the cases examined.     

Electron Energy Function Distribution in Hollow Cathode Discharge at Resonant Irradiation

Abstract

The behaviour of electron energy function distribution in hollow cathode discharge at resonant light irradiation is analyzed. The function is calculated for energies near and higher than the energy excitation ?₁ of the hellium metastable levels. It turns out that the electron energy function distribution is essentially influenced in the vicinity of point ?₁.     

Heating,Ionization and Optogalvanic Signals in Argon Hollow Cathode Discharge

The electron gas heating at resonant light irradiation of hollow cathode discharge is measured. The possible channels of opttogalvanic transformation of the absorbed photons are compared and disscised.     

Determination of Copper and Aluminium in Steel by Means of Hollow Cathode and Glow Discharge Light Sources: A Comparative Study

Abstract

The applicability of hollow cathode and glow discharge light sources to the determination of minor constituents in steel was tested in the case of copper (0.033 ? 0.34[wt]%) and aluminium (0.015 ? 0. 16%). The linearity of the calibration graphs, reflected by the Bravais-Pearson coefficient, was found to be slightly improved in all the cases investigated when operating with hollow cathode. Furthermore, results showed that blackening values of the analytical lines can be plotted directly without resorting to reference lines.     

辉光放电光谱分析技术在金属材料分析中的应用

本文主要介绍了辉光放电光谱仪的基本原理，分析特点以及在金属材料分析中的应用，并从理论上推导出辉光放电光谱分析技术用于金属材料分析的理论依据。着重介绍了基板分析、深度逐层分析。对磷青铜镀银层逐层分析；渗碳、氮钢板分析；彩涂钢板分析进行了探讨。     

Optogalvanic Diagnostic of Conical Bottom Hollow Calhode Discharge. Enhancement of the Optogalvanic Signal

We present an optogalvanic aspect of a new modification of Hollow Cathode Discharge (HCD), i.e. conical bottom HCD. Earlier we found this modification enhancing the light emission properties of the conventional flat bottom HCD; a greater concentration of sputtered atoms was established by using a level crossing method. This effect provoked us to investigate the conical bottom HCD as an optogalvanic detector of signals, belonging to the sputtered atoms in the negative glow. The conical bottom HCD is found to be an effective optogalvanic detector due to the structure of the radial distribution of the optogalvanic signal.     

Optical Probing of the Electron Energy Function Distribution in a Photoresonant Hollow Cathode Discharge

Optical probing of electron gas in photoresonant negative glow is considered. By monitoring the spectral line intensity it can be concluded that the transfer of excitation energy to the probe atoms is mainly due to the electron gas.