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Proceedings Paper

Indication of recombination-pumped population inversion in O VI and Li III ions using an ablative capillary discharge
Author(s): Manfred Poeckl; Rembert Fertner; Michael Hebenstreit; Theo Neger; F. Aumayr
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Paper Abstract

In order to investigate the possibility of recombination -- pumped lasing in the extreme ultraviolet (XUV) spectral range a fast ablative capillary discharge has been developed. Discharge currents of up to 15 kA with minimum rise-times of 20 ns could be achieved using Li2CO3 and SiO2 capillaries with diameters ranging from 1 mm to 2 mm and lengths ranging from 1 cm to 5 cm. Time-integrated as well as temporally and spatially resolved spectroscopic measurements have been performed. Using a Li2CO3 capillary (diameter: 2 mm, length: 5 cm) the Li III (2 $IMP 3) 729 angstrom line showed a significant increase of intensity during the cooling phase of the discharge while its spatial divergence was found to be decreasing. Indication of gain on the O VI (3d $IMP 4f) 520 angstrom transition could be obtained by varying the length of a SiO2 capillary (radius: 0.5 mm) from 3 cm to 5 cm.

Paper Details

Date Published: 25 September 1995
PDF: 9 pages
Proc. SPIE 2520, Soft X-Ray Lasers and Applications, (25 September 1995); doi: 10.1117/12.221657
Show Author Affiliations
Manfred Poeckl, Technische Univ. Wien (Austria)
Rembert Fertner, Technische Univ. Graz (Austria)
Michael Hebenstreit, Technische Univ. Graz (Austria)
Theo Neger, Technische Univ. Graz (Austria)
F. Aumayr, Technische Univ. Wien (Austria)

Published in SPIE Proceedings Vol. 2520:
Soft X-Ray Lasers and Applications
Jorge J. G. Rocca; Peter L. Hagelstein, Editor(s)

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