skip to main content

Title: Plasma Diagnostics Through Analysis of Ne I Line Shape Characteristics

On the basis of the experimentally determined 26 prominent neutral neon (Ne I) line shapes (in the 3s-3p, 3s-3p', 3s'-3p', 3s'-3p and 3p-3d transitions) the basic plasma parameters i.e. electron temperature (T) and electron density (N) have been obtained using the line deconvolution procedure, in a plasma created in a linear, low-pressure, pulsed arc operated in pure neon. The mentioned plasma parameters have also been measured using independent experimental diagnostics techniques. Agreement has been found among the two sets of the obtained parameters. This recommends the deconvolution procedure for plasma diagnostical purposes. Self-confidence of the method has checked using Ne I spectral lines which originate from different energy levels. The advance used of the method has been done in the way to find energy level from which it does not existing any more assumption of LTE.This method may be of interest also in astrophysics where direct measurements of the main plasma parameters (T and N) are not possible. With the development of space born spectroscopy the good quality spectra will be enabling to use this method. The separate electron (We) and ion (Wi) contributions to the total Stark width (Wt), which have not been measured so far, have also beenmore » obtained for neon spectral lines. The measured and calculated We data are compared to available theoretical We values. It has found stronger influence of the ion contribution to the Ne I lines shape than the predicted ones calculated by the current theory. It has also tested the ion contribution to the Ne II lines shape. Small influence of the ion contribution to the some Ne II line shape has evidenced.« less
Authors:
 [1] ;  [2]
  1. Faculty of Physics, University of Belgrade, P.O.B. 368, Belgrade (Serbia and Montenegro)
  2. (Ireland)
Publication Date:
OSTI Identifier:
20630450
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 740; Journal Issue: 1; Conference: 22. summer school and international symposium on the physics of ionized gases, Bajina Basta (Serbia and Montenegro), 23-27 Aug 2004; Other Information: DOI: 10.1063/1.1843518; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ELECTRON DENSITY; ELECTRON TEMPERATURE; ELECTRONS; EMISSION SPECTROSCOPY; ENERGY LEVELS; ION COLLISIONS; ION TEMPERATURE; IONS; LINE WIDTHS; LTE; NEON; PLASMA; PLASMA DENSITY; PLASMA DIAGNOSTICS; STARK EFFECT