Home Books eBooks Journals References & Proceedings Authors, Editors, Reviewers A-Z Product Index Awards
Progress in Plasma Processing of Materials, 1999

ISBN:
1-56700-126-2 (Print)

DIAGNOSTICS AND OPTICAL PROPERTIES OF DENSE HELIUM PLASMAS PRODUCED IN FLASHLAMP

Y. Vitel
Laboratoire des Plasmas Denses - Université Pierre et Marie Curie Tour 12 E5 - 4, place Jussieu - F-75252 Paris Cedex 05 - France

M. El Bezzari
Laboratoire des Plasmas Denses - Université Pierre et Marie Curie Tour 12 E5 - 4, place Jussieu - F-75252 Paris Cedex 05 - France

L.G. D'yachkov
Scientific Association Institute for High Temperatures - Russian Academy of Sciences Izhorskaya 13/19 - Moscow 127412 - Russia

Yu. K. Kurilenkov
Scientific Association Institute for High Temperatures - Russian Academy of Sciences Izhorskaya 13/19 - Moscow 127412 - Russia

Abstract

High pressure pulsed arcs produced in flashlamps filled with pure helium are applied for generation of dense helium plasmas characterised by temperature T ~ 2 eV and electron density ne ~ 1018 cm−3. Radiative emission from flashlamps in the spectral range 300-850 run is measured and calculated taking into account a non-ideal effect due to the ionic microfield distribution (line dissolution and photorecombination threshold shift and spread) and inhomogeneity of the arc plasma. Radial profiles of temperature and particle densities are deduced from the measurements of neutral line intensities and transverse distributions of emission. The values of temperature and electron density obtained are confirmed by absorption and interferometry measurements, respectively. A good agreement between the calculated and measured spectra is obtained.