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

Manfred Poeckl; Rembert Fertner; Michael Hebenstreit; Theo Neger; F. Aumayr

doi:10.1117/12.221657

25 September 1995 Indication of recombination-pumped population inversion in O VI and Li III ions using an ablative capillary discharge

Manfred Poeckl, Rembert Fertner, Michael Hebenstreit, Theo Neger, F. Aumayr

Author Affiliations +

Proceedings Volume 2520, Soft X-Ray Lasers and Applications; (1995) https://doi.org/10.1117/12.221657
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

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.

Citation Download Citation

Manfred Poeckl, Rembert Fertner, Michael Hebenstreit, Theo Neger, and F. Aumayr "Indication of recombination-pumped population inversion in O VI and Li III ions using an ablative capillary discharge", Proc. SPIE 2520, Soft X-Ray Lasers and Applications, (25 September 1995); https://doi.org/10.1117/12.221657

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