EMISSION CHARACTERISTICS OF THE GAS-JET ASSISTED GLOW-DISCHARGE FOR DIRECT SOLID ANALYSIS - PRELIMINARY STUDIES .1.

The gas jet enhanced glow discharge system for direct solid analysis h as been designed and constructed in our laboratory. Contrary to the co nventional glow discharge, the laminar flow of argon gas through the 0 .5 mm gap impacts a surface of solid sample. In addition, a needle val ve is placed between a glow discharge cell and a vacuum pump to contro l the pressure of a glow discharge cell. As a result, the pressure cou ld be precisely controlled without changing the flow rate of argon gas . Due to the presence of laminar flow of argon gas onto the surface of the sample, the analytical performances are quite different from thos e observed in a conventional glow discharge system. Emission behaviors of resonance and non-resonance lines for Cu, Zn and Ar are mainly dis cussed. In this report, the preliminary experimental results including emission characteristics and sputtering efficiency are presented.