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Diagnostics of Tin Plasma Produced by Visible and IR Nanosecond Laser Ablation
Author(s) -
Hanif M.,
Salik M.
Publication year - 2015
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201400055
Subject(s) - plasma , laser , materials science , tin , nanosecond , harmonics , laser induced breakdown spectroscopy , laser ablation , electron temperature , atomic physics , analytical chemistry (journal) , electron density , langmuir probe , spectroscopy , plasma diagnostics , optics , chemistry , physics , voltage , chromatography , quantum mechanics , metallurgy
We present the optical emission spectroscopic studies of the Tin (Sn) plasma, produced by the fundamental (1064 nm) and second (532 nm) harmonics of a Q switched Nd: YAG pulsed laser having pulse duration of 5 ns and 10 Hz repetition rate which is capable of delivering 400 mJ at 1064 nm, and 200 mJ at 532 nm using Laser Induced Breakdown Spectroscopy (LIBS). The laser beam was focused on target material by placing it in air at atmospheric pressure. The experimentally observed line profiles of four neutral tin (Sn I) lines at 231.72, 248.34, 257.15 and 266.12 nm were used to extract the electron temperature ( T e ) using the Boltzmann plot method and determined its value 6360 and 5970 K respectively for fundamental and second harmonics of the laser. Whereas, the electron number density ( N e ) has been determined from the Stark broadening profile of neutral tin (Sn I) line at 286.33 nm and determined its value 5.85 x 10 16 and 6.80 x 10 16 cm –3 for fundamental and second harmonics of the laser respectively. Both plasma parameters ( T e and N e ) have also been calculated by varying distance from the target surface along the line of propagation of plasma plume and also by varying the laser irradiance. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)