Gain measurements of the C VI 3/ital d/--2/ital p/ transition (18. 2 nm) from the wall-confined carbon plasmas produced by a CO/sub 2/ laser

Journal Article · Mon Jul 17 04:00:00 EDT 1989 · Appl. Phys. Lett.; (United States)

OSTI ID:5947035

Koyama, F; Kinoshita, S; IgaT060Miura, E; Daido, H; Kitagawa, Y; Sawai, K; Kato, Y; Nishihara, K; Nakai, S; Yamanaka, C; others, and

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 3/ital d/--2/ital p/ 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 and density of 1.2/times/10/sup 19/ cm/sup /minus/3/ near the cylinder wall measured using soft-x-ray spectroscopy satisfied the condition for the generation of the population inversion between /ital n/=3 and 2 levels of the C VI ions.

• Research Organization: Institute of Laser Engineering, Osaka University, Suita, Osaka 565, Japan (JP); Institute for Laser Technology, Suita, Osaka 565, Japan
• OSTI ID: 5947035
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 55:3; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFICATION
CARBON
CARBON DIOXIDE LASERS
CARBON IONS
CHARGED PARTICLES
DATA
ELECTROMAGNETIC RADIATION
ELECTRON DENSITY
ELECTRON TEMPERATURE
ELEMENTS
EMISSION SPECTRA
EXPERIMENTAL DATA
EXTREME ULTRAVIOLET RADIATION
GAIN
GAS LASERS
INFORMATION
IONS
LASER-PRODUCED PLASMA
LASERS
NONMETALS
NUMERICAL DATA
OPTICAL PUMPING
PLASMA
POPULATION INVERSION
PUMPING
RADIATIONS
RECOMBINATION
SPECTRA
ULTRAVIOLET RADIATION