Indication of recombination-pumped population inversion in O VI and Li III ions using an ablative capillary discharge

Autor:	Rembert Fertner, Manfred Poeckl, Michael Hebenstreit, Theo Neger, Friedrich Aumayr
Předmět:	Chemistry Capillary action Extreme ultraviolet Analytical chemistry Phase (waves) Radius Population inversion Lasing threshold Line (formation) Ion
Zdroj:	Scopus-Elsevier
Popis:	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.© (1995) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Databáze:	OpenAIRE
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