Plasma and Spectroscopic Analysis V. Plasma Diagnostics by Spectroscopic Methods

Spectroscopic diagnostics of plasma during laser processing

The role of the plasma in laser–metal interaction is of considerable interest due to its influence in the energy transfer mechanism in industrial laser materials processing. A 10 kW CO2 laser was used to study its interaction with aluminium under an argon environment. The objective was to determine the absorption and refraction of the laser beam through the plasma during the processing of alumi...

Spectroscopic Diagnostics for AGNs

A review of the spectroscopic tools needed to characterize AGNs is presented. This review focusses on ultraviolet, optical and infrared emission-line diagnostics specifically designed to help differentiate AGNs from starburst-dominated galaxies. The strengths and weaknesses of these methods are discussed in the context of on-going and future AGN surveys.

Analysis Using Infrared Spectroscopic Methods

Spectroscopic diagnostics of the plasma in the cathode region of a nitrogen glow discharge

2014 Spatially resolved spectroscopic diagnostics such as plasma-induced emission, laser-induced fluorescence and laser optogalvanic spectroscopy are used to characterize the cathode sheath and the negative glow of an abnormal glow dc discharge in nitrogen. These diagnostics provide local information on the excitation and ionization functions, on the concentrations of ions and on the rotational...

L-shell spectroscopic diagnostics of radiation from krypton HED plasma sources.

X-ray spectroscopy is a useful tool for diagnosing plasma sources due to its non-invasive nature. One such source is the dense plasma focus (DPF). Recent interest has developed to demonstrate its potential application as a soft x-ray source. We present the first spectroscopic studies of krypton high energy density plasmas produced on a 3 kJ DPF device in Singapore. In order to diagnose spectral...