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Title: Spectroscopy of laser produced plasmas: design and development of a laser-induced breakdown spectroscopy (LIBS) set-up for trace element detection
Researcher: Unnikrishnan V K
Guide(s): Santhosh C
Keywords: Spectroscopy
Laser Induced Breakdown Spectroscopy
Upload Date: 5-Nov-2012
University: Manipal University
Completed Date: 08/03/2012
Abstract: Laser-induced plasmas (LIPs) of materials formed at laser pulse irradiances near the plasma ignition threshold are of great interest since they have several important applications. Optical emission spectra of a LIP consist of atomic and ionic lines, superimposed on a continuum of radiation. Elemental analysis of the sample based on the optical emission spectra from a LIP is newlineknown as laser-induced plasma spectroscopy (LIPS), also called as laser-induced breakdown spectroscopy (LIBS). The LIBS technique, utilizing a pulsed LIP formed near the plasma ignition threshold as a spectroscopic source, is fast becoming an analytical technique which can provide remote, in-situ, rapid and multi-elemental analysis of bulk and trace sample in any phase (solid, liquid and gas) with no or minimal sample preparation. In particular, vaporization and excitation of samples are possible in a single step and no restriction has to be placed on the sample size or specific sample preparation. During the last two decades, LIBS has attracted a lot of attention, leading to an ever-increasing list of applications, both in laboratory and in industry. In view of the above, it?s inferred that a LIBS system can very well detect trace level elemental presence in environmental samples like soil. The need for such newlinevaluable information has become imperative in view of the increased environmental pollution caused by the advancing technologies such as nuclear and thermal power stations, special newlinematerial connected technologies (semiconductor), and industries like oil, petroleum, and fertilizers.
Pagination: 246p.
Appears in Departments:Centre for Atomic and Molecular Physics

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01_title.pdfAttached File263.44 kBAdobe PDFView/Open
02_certificate.pdf336.83 kBAdobe PDFView/Open
03_abstract.pdf13.52 kBAdobe PDFView/Open
04_declaration.pdf298.31 kBAdobe PDFView/Open
05_dedication.pdf129.36 kBAdobe PDFView/Open
06_contents.pdf53.5 kBAdobe PDFView/Open
07_list_of_tables.pdf41.25 kBAdobe PDFView/Open
08_list_of_figures.pdf52.43 kBAdobe PDFView/Open
09_abbreviations.pdf24.46 kBAdobe PDFView/Open
10_preface.pdf92.47 kBAdobe PDFView/Open
11_chapter i.pdf200.27 kBAdobe PDFView/Open
12_chapter ii.pdf457.53 kBAdobe PDFView/Open
13_chapter iii.pdf2.54 MBAdobe PDFView/Open
14_chapter iv.pdf1.84 MBAdobe PDFView/Open
15_chapter v.pdf463.21 kBAdobe PDFView/Open
16_chapter vi.pdf557.66 kBAdobe PDFView/Open
17_chapter vii.pdf1.63 MBAdobe PDFView/Open
18_summary.pdf87.16 kBAdobe PDFView/Open
19_list_of_publications.pdf2.85 MBAdobe PDFView/Open

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