Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

S. V. Krishna Kumar ¹

Affiliations
1 Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Bombay 400 005, IN

Abstract

An introduction to mass spectrometric diagnostics of plasmas with an emphasis on the study of glow discharge plasmas is presented. Relative intensities of the negative ions present in a pure oxygen plasma has been studied as-a function of gas pressure, discharge current and reduced electric field (E/N) using a quadrupole mass spectrometer. The variation in the intensity of different negative ions is attributed to the gas phase reactions involving electrons, neutral species, excited molecules, positive ions and negative ions.

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