Emission Characteristics and Sensitivity in a High-Voltage Spark Discharge.
Emission Characteristics and Sensitivity in a High-Voltage Spark Discharge.
复制标题
高压火花放电的发射特性和灵敏度。
DOI：
10.1021/ac60231a010
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发表时间：
1965
影响因子：
7.4
通讯作者：
H. V. Malmstadt
中科院分区：
文献类型：
--
作者：
J. P. Walters;H. V. Malmstadt
用时间分辨发射光谱法详细描述了铝基合金和石墨对电极之间的高压振荡火花放电。重点是控制从火花获得的灵敏度，离子和原子发射的类型和原因显示在放电寿命的四个关键阶段在不同区域的间隙。火花的初始击穿，随后的电极取样和电极材料穿过间隙的传播被证明是确定线和背景发射的类型和强度的关键。讨论了背景发射，以及增加在铝系统中观察到的信噪比的方法。通过对火花源的简单修改，在火花间隙的某些区域中，对于选定的元件，可以实现超过从典型直流电弧观察到的线与背景比。
A high-voltage oscillatory spark discharge between an aluminum-base alloy and graphite counter electrode is described in detail withthe aid of time-resolved emission spectrometry. With emphasis on controlling the sen-sitivity obtainable from the spark, the types and causes of ion and atom emission are shown in four critical stages of discharge lifetime at various regions across the gap. The initial breakdown of the spark, followed by electrode sampling andthe propagation of electrode material across the gap is shown to be critical in determining the type andintensity of line and background emission. Background emission is discussed, along with methods for increasing the signal-to-noise ratios observed in the aluminum system. By a simple modification of the spark source, it is possible to achieve line-to-background ratios in excess of those observed from a typical direct-current arc for selected elements in certain regions of the spark gap.