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dc.creatorHanna, Sherif Fayezen_US
dc.date.accessioned2012-06-07T23:04:58Z
dc.date.available2012-06-07T23:04:58Z
dc.date.created2001en_US
dc.date.issued2001
dc.identifier.urihttp://hdl.handle.net/1969.1/ETD-TAMU-2001-THESIS-H3643en_US
dc.descriptionDue to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item.en_US
dc.descriptionIncludes bibliographical references (leaves 93-96).en_US
dc.descriptionIssued also on microfiche from Lange Micrographics.en_US
dc.description.abstractThe physics of polarization spectroscopy has been studied theoretically and experimentally. Theoretically, the dependence of saturated polarization spectroscopy signal has been studied using the direct numerical integration code (DNI) of the time-dependent density matrix equations. Understanding the saturation behavior of polarization spectroscopy signals is a vital task for the development of this method as a potential diagnostics method. However, the underlying equations for this method are complicated. A model has been developed in this work to describe the curve shape of polarization spectroscopy power-dependence scans in both the saturated and the unsaturated regimes. The results have been compared to experimental results performed in Lund Institute, Sweden. Polarization spectroscopy saturation curves in the co-propagating beam geometry from the excitation of OH A ²[]⁺-X²[] (0,0) at the Q₂(8) line for sub-atmospheric pressures have been fitted to the proposed model. The model proposed in this work provides excellent fits to polarization spectroscopy saturation curves for absorption lines dominated by homogeneous broadening and for narrow-bandwidth excitation sources. The model does not provide an adequate description for inhomogeneous broadened lines when compared to experimental data. For this case an empirical equation is proposed. The proposed model offers a starting point for simplification of the underlying polarization spectroscopy theory and provides new opportunities for further development of this theory. Experimentally, the effect of pump beam polarization is investigated in a co-propagating geometry. The behavior of the polarization spectroscopy signal for linear and circular pump polarization for different transitions and different levels of saturation is studied.en_US
dc.format.mediumelectronicen_US
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_USen_US
dc.publisherTexas A&M Universityen_US
dc.rightsThis thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use.en_US
dc.subjectmechanical engineering.en_US
dc.subjectMajor mechanical engineering.en_US
dc.titleTheoretical and experimental investigation of polarization spectroscopyen_US
dc.typeThesisen_US
thesis.degree.disciplinemechanical engineeringen_US
thesis.degree.nameM.S.en_US
thesis.degree.levelMastersen_US
dc.type.genrethesis
dc.type.materialtexten_US
dc.format.digitalOriginreformatted digitalen_US


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