Effects of 2 mass % Si admixture in a laser-produced Fe plasma

Krása, Josef; Láska, Leoš; Rohlena, Karel; Velyhan, Andriy; Lorusso, Antonella; Nassisi, Vincenzo; Czarnecka, Agata; Parys, Piotr; Ryć, Leszek; Wolowski, Jerzy
November 2008
Applied Physics Letters;11/10/2008, Vol. 93 Issue 19, p191503
Academic Journal
Emission of multiply charged ions and soft x-rays from the plasmas produced by laser pulses focused on (111) surface of Fe and Fe-2 mass % Si single crystals is investigated for wavelengths of 1064 and 248 nm and intensities up to ≈1×1010 W/cm2. It is demonstrated that the Si admixture in the Fe plasma results in a higher emission of Feq+ ions (1≤q≤4) but in a markedly lower x-ray emission. The relation of wavelengths and pulse durations of laser beams used is figured in the fluence dependence of the ion emission.


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