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Femtosecond-pulse-driven soft X-ray laser studies using a gas puff target irradiated with a Ti:sapphire laser.

Fiedorowicz H., Bartnik A., Szczurek M., Cang Hee Nam, Mocek T., Hyun Joon Shin, Yong Ho Cha, Dong Gun Lee, Kyung Han Hong Kyung Han

Optica Applicata

2000

Vol. 30, nr 1

93-102

Preliminary experimental investigations on soft X-ray lasers based on optical field ionization of gases with an ultrashort-pulse terawatt laser system are presented. Both recombination and collisional soft X-ray laser schemes have been studied. 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 a form of a slit was used to create an X-ray laser active medium. The target was irradiated with laser pulses from a 20-fs, 50-mJ Ti:sapphire (Ti:S) laser system. Soft X-ray spectra from nitrogen, oxygen, and xenon targets are presented and discussed.