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Title: Spectroscopy of laser-produced plasma plumes
Author: Lewis, W. P.
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1995
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The primary objective of the work described in this thesis is to examine the plume of neutral and ionized vapour generated when an intense pulsed laser beam is incident on a target surface and to ascertain optimum conditions to ensure that the optical emission produced from the plume, which is in effect a high temperature plasma, could be used for spectroscopic analysis of the target material. This use of a focused laser beam to yield information concerning the elemental nature of the material is generally known as Laser-Induced Breakdown Spectroscopy (L.I.B.S.). In addition it was hoped that the constituents of the plume might be further analysed by inducing fluorescence from the atoms present. The present thesis describes the investigations which commenced in 1984 in an empty laboratory and with very little equipment. The initial phase was essentially the design, construction, assembly and characterization of apparatus and the design of relevant experiments. Details of the tunable dye laser, associated control electronics and vacuum and gas-handling equipment and target mounting and target chamber are described. Characteristics of the laser system were measured and are discussed. Observations of the emission spectra of various laser-produced plasmas from a number of targets are described and discussed. Although the preliminary work by the author ended in 1988 it laid the foundations for further L.I.B.S. work in the laboratory and which has led to the submission of theses, presentations and publication of papers (Goddard 1990, Allott 1992, Williams 1993, Davies 1994). The present work constitutes the essential precursor to the work of Goddard, Allott, Williams and Davies.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available