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25 September 1995 Soft x-ray emission from fs laser plasmas in line focus geometry
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We report x-ray spectra emitted from plasmas generated by focusing 130 mJ/120 fs pulses of the MPQ Ti:Sapphire laser facility on solid targets. Low-Z elements (from Li, Z equals 3 to K, Z equals 19) were chosen as the target materials. By means of two cylindrical lenses a line focus was produced, and in combination with a stepped mirror the laser pulse can be brought to travel along the line focus with the velocity of light. X-ray spectra were observed in the direction of the axis of the line focus by a transmission grating spectrometer coupled to a backside illuminated x-ray CCD. Special attention was given to the emission of those lines which are candidates for lasing. We report systematic investigations with varied laser intensity and line focus geometry. Implications of the observed spectra on the development of a table- top x-ray laser are discussed and plans for similar experiments with an upscaled version of the pump laser are presented.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ernst E. Fill and Georg Pretzler "Soft x-ray emission from fs laser plasmas in line focus geometry", Proc. SPIE 2520, Soft X-Ray Lasers and Applications, (25 September 1995);

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