TITLE

Gain measurements of the C VI 3d–2p transition (18.2 nm) from the wall-confined carbon plasmas produced by a CO2 laser

AUTHOR(S)
Miura, E.; Daido, H.; Kitagawa, Y.; Sawai, K.; Kato, Y.; Nishihara, K.; Nakai, S.; Yamanaka, C.
PUB. DATE
July 1989
SOURCE
Applied Physics Letters;7/17/1989, Vol. 55 Issue 3, p223
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We propose a 1-cm-long cylinder-type target as the gain medium of a recombination-pumped extreme-ultraviolet (XUV) laser. The gain medium plasma was pumped by a long-pulse CO[sub 2] laser (400 J energy in 50 ns pulse duration). At the C VI 3d-2p transition (18.2 nm) we obtained the gain-length product up to 2.4, which was estimated from the line intensity ratio of the axial to transverse directions. The electron temperature of 54 eV arid density of 1.2 × 10[sup 19] cm[sup -3] near the cylinder wall measured using soft-x-ray spectroscopy satisfied the condition for the generation of the population inversion between n = 3 and 2 levels of the CVI ions.
ACCESSION #
9832026

 

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