J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 1185-1187
Numerical analysis of energy transport by intense resonance line in Lithium plasmasT. Nishikawa1, K. Gamada2, A. Sunahara3 and K. Nishihara2
1 Department of Electrical and Electronic Engineering, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530, Japan
2 Institute of Laser Engineering, Osaka University, 2-6 Suita, Osaka 565-0871, Japan
3 Institute of Laser Technology, 2-6 Suita, Osaka 565-0871, Japan
Energy transport by a strong resonance line like Lyman has been studied numerically. The corona region of laser-produced Li plasmas is assumed to be the isothermal expansion model. As a result, though the peak intensity of Lyman keeps Planckian value, width of the line becomes broader during the transmission in the corona region. If the optical depth could be controlled thicker much more than unity, available power exceeds the value of surface area intensity of Planckian line width of emissivity, and the EUV light source for the semiconductor lithography can be designed by Li target.
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