Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Singh, Jagdish P.
Committee Member
Monts, David L.
Committee Member
Wang, Chuji
Committee Member
Su, Chun Fu
Committee Member
Yueh, Fang Yu
Other Advisors or Committee Members
Philip, Thomas
Date of Degree
12-15-2007
Document Type
Dissertation - Open Access
Major
Applied Physics
Degree Name
Doctor of Philosophy
College
James Worth Bagley College of Engineering
Department
Applied Physics Program
Abstract
Laser induced breakdown spectroscopy (LIBS) was tested to examine its applicability to remote and in suit analysis in inaccessible situation. Two types of liquid sample (slurry) prepared for simulating vitrification of liquid hazardous wastes was tested. In situ analysis ability makes the LIBS technique practical for analysis of the slurry samples during vitrification, which is in inaccessible situation. For the first slurry sample, two slurry circulation systems were devised to overcome major technical problems associated with LIBS measurements of slurry samples - namely sedimentation and change in the lens-to-sample distance (L.T.S.D) during measurement. The second slurry sample contained less water and is able to be managed in a small glass container during test. We applied direct analysis of slurry sample filled in glass container. Spectroscopic analysis was performed using two different detection systems: Czerny-Turner and Echelle spectrometer systems. In particular, spectroscopic analysis of data from an echelle spectrometer shows the high efficiency for simultaneously determining physical quantities of all elements of interest. We also evaluate LIBS technique to tin alloy samples for the purpose of quantitative analysis by using Echelle spectrometer system. Unknown samples without information of elemental composition were tested to estimate several sample compositions simultaneously. An artificial neural network, calibration method, and chemical analysis were applied to estimate the elemental concentrations of impurities in tin (Sn) alloy.
URI
https://hdl.handle.net/11668/17488
Recommended Citation
Oh, Seong Yong, "Laser Induced Breakdown Spectroscopy: Investigation Of Line Profiles, Slurries And Artifical [Sic] Neural Network Prediction" (2007). Theses and Dissertations. 2924.
https://scholarsjunction.msstate.edu/td/2924
Comments
Slurry||Laser induced breakdown spectroscopy||Line profile