Abstract
Several years ago, a surface-wave-induced plasma device known as a “surfatron” appeared as a promising new source for atomic emission spectrometry. Since that time little further development of the surfatron has been published. We have therefore sought to re-evaluate the surfatron by (a) reviewing the subject of surface-wave induced plasmas, (b) describing in detail the construction and operation of the surfatron, (c) studying the tuning capabilities of the system and (d) examining the spatial emission properties of the surfatron. The surfatron possesses a number of advantages over other kinds of microwave-induced plasma devices such as the Beenakker-type resonant cavity. Significantly, surfatron-sustained plasmas were produced readily in either argon or helium and were easily tuned. Moreover, the helium plasma showed resilience to the introduction of nebulized solutions and also possessed an annular shape. The surfatron showed much greater resistance to detuning caused by changes in plasma density than did the more conventional resonant-cavity system and required no external tuning elements.
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