Abstract
A hollow cathode discharge cell has been developed for a variety of sample phases. To make the experimental apparatus compact, we have adopted DC discharge, and the discharge cell was inexpensively constructed for replacement with commercially available vacuum parts. The most distinctive attribute of the developed cell is the double structure of the cathodes. The occurrence of sputtering resulted in the metal atom in gas phase. With Ar buffer gas, the favorable condition of laser absorption spectroscopy for the gas phase sample was investigated.
Highlights
A hollow cathode concentrates electron density in the center of the cathode
Solid samples may be vaporized into single atoms even if they are present in the sample as chemical compound constituents
The emission spectra of sputtering of solid tungsten (Figure 4) and liquid residue containing several elements (Figure 5) were observed. e liquid residue sample was dropped onto the electrode and dried with infrared lamp heating
Summary
A hollow cathode concentrates electron density in the center of the cathode. As a result, it is expected that in this region, the density of excited atomic species is highest [1]. is geometry is suitable for laser spectroscopy, and hollow cathode discharge cells have already been made commercially available [2]. Is geometry is suitable for laser spectroscopy, and hollow cathode discharge cells have already been made commercially available [2]. Electrons in a discharge may cause atomic excitation.
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