逆電位変調法による熱イオンのエネルギ-分布測定の研究

概要

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A specially designed retarding field energy analyzer has been set in the front of a quadrupole mass filter for studying the energy distribution of thermal ion emitted from a hot metal surface. The distribution curve and its derivative are obtained by the technique of electrical differentiation of the retarding voltage curve in which a small sinusoidal modulation voltage is applied to the two retarding grids in a method similar to Auger electron spectroscopy with a four-grid low energy electron diffraction optics. The effects of frequency and amplitude of the modulation voltage on fundamental and second harmonic components being proportional to the energy distribution function and its derivative have been investigated. The results have been applied to study the energy distributions of Na+, K+ and Rb+ thermal ions emitted from a tungsten ribbon.
日本質量分析学会の論文