Characterising the Radio Frequency Plasma Source for Glow Discharge Optical Emission Spectroscopy

Spatially resolved observation of a radio-frequency-powered glow discharge plasma for emission spectrometric analysis.

In glow discharge optical emission spectrometry, two-dimensional emission images for iron atomic lines were measured by using an imaging spectrograph equipped with a CCD detector, when a radio-frequency (r.f.) power source was employed for excitation. Emission images at the Fe I 371.99-nm and the Fe I 375.82-nm lines, having different excitation energies, were analyzed by the two-line method to...

Radio Frequency Glow Discharge Optical Emission Spectroscopy Depth Profiling Analysis of Thin Anodic Alumina Films as Potential Reference Materials

s in any form of chemical analysis, the quality of information obtained from a depth profiling experiment is only as good as the reference materials that are used to calibrate the instrument. In the case of depth profiling, calibration must take place in terms of chemical composition as well as distribution with respect to the specimen surface. The nature of applications requiring such analyses...

RF Glow Discharge Atomic Emission Spectroscopy of Non-Conducting Materials

Effect of the driving frequency on the emission characteristics of a radio-frequency glow discharge excitation source boosted by the introduction of a d. c. bias current.

In a radio-frequency-powered glow discharge lamp, a d.c. bias current which is driven by a self-bias voltage can lead to an enhancement of the emission intensities excited by the plasma. The driving frequency of the r.f. plasma is an important parameter to determine the self-bias voltage; lower r.f. frequencies induce greater self-bias voltages. The effects of the bias current introduction on t...

Spatially-resolved observation of the excitation temperature in a glow discharge plasma for atomic emission spectrometry.

A two-dimensionally imaging spectrometer system was employed to obtain the spatial distribution of the excitation temperature in a glow discharge plasma for emission analysis. A Grimm-style glow discharge excitation source, whose hollow anode had an inner diameter of 8 mm, was observed over the whole emission area. The mapping of the excitation temperature was conducted by using a two-line meth...