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"Atomic Model Calculations of Gain Saturation in the 46.9 nm Line of Ne-like Ar" S.V. Kukhlevsky, A. Ritucci, I.Z. Kozma, J. Kaiser, A. Shlyaptseva, G. Tomassetti, O. SamekContr. Plasma Phys. 42, 109-118 (2002) Abstract: The gain saturation in the 46.9 nm line of the Ar+8 laser is analyzed using an atomic kinetics code. The dependence of the gain (G) on the electron kinetic temperature (Te) in the region (50 -150 eV) is calculated in the quasi steady-state approximation for the different values of the electron density (Ne) and the plasma radius (rpl). The influence of radiat on trapping, ion random and mean velocities, Stark line broadening and refraction losses on the gain saturation is taken into consideration. For rpl = 150-600 m, the amplplication (G > 0 cm-1) exists in the large temperature/density domain (Te = 60-150 eV, Ne = 0.5-10 × 1018 cm-3). However, the value Gs 1.4 cm-1 required for the gain saturation at the typical plasma length Lpl 15 cm is reached in the extremely narrow density regions at the high temperatures. The saturation is reached for rpl = 600 m at Tse = 150 eV in the region Nse = 1.8-2 × 1018 cm -3, for rpl = 300 m at Tse = 125 eV and Nse = 2.5-3 × 1018 cm-3, and for rpl = 150 m at Tse = 110 eV and Nse = 3-4 × 1018 cm-3. The broadest density region (Nse = 2 -8 × 1018 cm-3) is predicted for the narrowest column (rpl = 150 m) at the highest temperature (Tse = 150 eV). The operation in the broadest density region Nse, should make easier achievement of the gain saturation in the experiments. This publication has not been written at BMO BMO authors (in alphabetic order): Ida Zsuzsanna Kozma  WWW-Version |
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Letzte Änderung: 2016-09-14 13:34
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