J. Phys. IV France 11 (2001) Pr2-197-Pr2-200
Investigations on femtosecond-pulse-driven soft X-ray lasers using a gas puff target irradiated with a Ti:Sapphire laserH. Fiedorowicz1, A. Bartnik1, M. Szczurek1, T. Mocek2, H.J. Shin2, Y.H. Cha2, D.G. Lee2, K.H. Hong2 and C.H. Nam2
1 Institute of Optoelectronics, Military University of Technology, ul. Kaliskiego 2, 00-908 Warsaw, Poland
2 Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Yusong-gu, 305-701 Taejon, Korea
Experimental investigations on soft x-ray lasers based on optical field ionization of gases with an ultrashort-pulse terawatt laser system are presented. The x-ray laser active medium was created using an elongated gas puff target formed by pulsed injection of a small amount of gas from a high-pressure electromagnetic valve through a nozzle in the form of a slit. The target was irradiated with a laser pulses from a 20-fs. 50-mJ Ti:Sapphire (Ti:S) laser system Both recombination and collisional soft x-ray laser scheme have been studied. Soft x-ray spectra from nitrogen, oxygen, and xenon targets are presented and discussed.
© EDP Sciences 2001