Naslov
Expansion and backscattering of laser produced Fe plasma plume

Autori
Bišćan, Marijan ; Milošević, Slobodan

Izvornik
Spectrochimica acta. Part B, Atomic spectroscopy (0584-8547) 68 (2012); 34-39

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
laser produced plasma; backscattering; CRDS

Sažetak
Forward and backward moving atoms within the laser produced plasma plume were studied by means of a cavity ringdown spectroscopy. The plume was produced using a nanosecond Nd-YAG laser pulse illuminating stainless steel target in vacuum or helium background gas. Measurements were done at pressures ranging from $10^{; ; ; ; ; ; ; -5}; ; ; ; ; ; ; $ to 1 mbar. Atomic absorption line shapes of iron around 388 nm were measured above and below the target at different times after ablation initiation. Changes in absorption line shapes were used to estimate kinetic parameters of plasma plume. The observations were interpreted through modeling which takes into account angular and velocity distributions of atoms in the expanding plume. The amount of backward scattered atoms was about 10\% of the total number of particels.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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