- Conference date: 27-31 May 2002
- Location: Aspen, Colorado (USA)
We observed strong amplification of the transition of 4d 4p, J = 0 1 (the transition from (3d 3/2, 4d 3/2)0 to (3d 3/2, 4p 1/2)1) of the Ni‐like lanthanum (La) ions at a wavelength of 8.8 nm pumped by a compact CPA Nd:Glass laser light at a wavelength of 1.053 μm with a pumping energy of 18 J. The experimental gain coefficient and the achieved gain‐length product was 14.5 cm−1 and 7.7, respectively. In this experiment, the pumping laser pulse consisted of a pre‐pulse with a duration of 200 ps and a 7ps‐duration main pulse, separated by 250 ps. A hydrodynamics simulation coupled with a collisional‐radiative model showed that the present experimental condition generated a pre‐formed plasma with small volume and made it possible by the main pulse to heat the high density region effectively.
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