J. Phys. IV France 11 (2001) Pr2-111-Pr2-114
Soft X-ray laser amplification through dynamics of capillary discharge Z-pinch plasmasS. Karashima1, T. Koike2 and Y. Makiuchi1
1 Department of Electrical Engineering, Science University of Tokyo, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
2 Department of Radiological Sciences, International University of Health and Welfare, 2600-1 Kitakanemaru, Otawara-shi, Tochigi 324-8501, Japan
The optimum conditions for soft x-ray amplification through the dynamics of Ar plasma, created by the capillary discharge Z-pinch, have been investigated. The numerical simulation of plasma dynamics was based on magnetohydrodynamic one-dimensional radiation model at different initial discharge pressures ranging from 240 to 15000 mTorr. The plasma behavior of the implosion-pinch phase was analyzed, taking plasma atomic processes into account. The optimum soft x-ray lasing occurs in the 3s-3p transition in Ne-like Ar plasma. Radiation emission and absorption effects on gain coefficients were also examined.
© EDP Sciences 2001