Control of d.c. bias current in radio-frequency glow discharge source and its emission characteristics

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30 Citations (Scopus)

Abstract

A novel technique to control r.f.-powered Grimm-style glow discharge plasmas is described. A new channel of d.c. current driven by the self-bias potential is opened by using a low-pass filter circuit and a load resistor; as the result, a large number of electrons can flow along the d.c. circuit channel including the plasma body from the grounded electrode to the sample electrode. This phenomenon is effective for improvement of the detection sensitivity in the optical emission spectrometry. Atomic emission lines having lower excitation energies are predominantly enhanced by a factor of 10-20. The conduction of the d.c. bias current could promote these excitations.

Original languageEnglish
Pages (from-to)527-535
Number of pages9
JournalSpectrochimica acta, Part B: Atomic spectroscopy
Volume54
Issue number3
DOIs
Publication statusPublished - 1999 Apr 5

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

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