کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5437762 1398177 2017 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation of atomic and ionic titanium lines, diatomic TiOγ transition and continuum background radiation via magnetically confined LIBS
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Experimental investigation of atomic and ionic titanium lines, diatomic TiOγ transition and continuum background radiation via magnetically confined LIBS
چکیده انگلیسی
This paper is focused on the clarification of the behaviour of various atomic, ionic, and TiOγ (A3Φ - X3Δ, Δν =0) diatomic transition lines as well as the continuum radiations in laser-induced titanium plasma plume by a pair of NdFeB. Depending on their different amount of impressionability from applied fields and electron-impact excitation rate, the responses of each component in optical emission spectrum and background continuum radiation to different applied magnetic field strengths (~ 0.42-1.12 T) are significantly different. At magnetic fields of 0.98 and 1.12 T, the amount of impressionability for Ti i: 388.2 nm is higher than others, while for TiOγ molecular transitions, the amount of impressionability factor in a 0.98 T field strength is considerable, because in the first moments after the laser pulse the continuum radiation is dominant, by applying an external magnetic field, this amount of radiation be reduced. The temporal evolution of the optical emission lines shows that choosing a suitable time delay and gate width has a considerable role in further impressionability of externally applied field in case of different elements. The electron density Ne varied from 0.99×1017 to 11.53×1017 cm−3, and the plasma temperature Te, was obtained in a range of 4835-16818 K by employing maximum applied field of 1.12 T. The supplementary investigations will be conducted towards further improvements of the purposeful analysis of each component in confined plasma by magneto-LIBS technique in order to find new approaches in the field of magnetic confinement.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 11, 1 August 2017, Pages 8356-8363
نویسندگان
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