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http://hdl.handle.net/11375/6214
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DC Field | Value | Language |
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dc.contributor.advisor | Ballik, E.A. | en_US |
dc.contributor.author | Lee, Yee Wing | en_US |
dc.date.accessioned | 2014-06-18T16:34:30Z | - |
dc.date.available | 2014-06-18T16:34:30Z | - |
dc.date.created | 2010-04-05 | en_US |
dc.date.issued | 1983 | en_US |
dc.identifier.other | opendissertations/1541 | en_US |
dc.identifier.other | 2152 | en_US |
dc.identifier.other | 1261473 | en_US |
dc.identifier.uri | http://hdl.handle.net/11375/6214 | - |
dc.description.abstract | <p>The optical output characteristics of a photo-preionized avalanche discharge XeCl exciplex laser are studied experimentally and analytically. Experimental results are presented for the employing a range of He/Xe/HCl mixtures and discharge conditions. An output energy of ~200 mJ, in an almost flat-topped 60-ns duration (FWHM) optical pulse, has been attained. A viable kinetic scheme has been developed for modelling the laser output pulses, and for investigating the dynamical processes in a pulsed discharge.</p> <p>The B ²∑⁺₁₂→X ²∑⁺₁₂ emission is characterized by means of Franck-Condon calculations using wavefunctions derived from a Rittner-type potential for the excimer B-state, and a new potential-energy function for the ground X-state. This new function reproduces accurately (~±1%) published experimentally-derived data, and demonstrates the "super-harmonicity" of the ground state molecule. The primary exciplex formation channels, deduced from the electronic structure, are the recombination of Xe⁺ and Cl⁻ ions and the "harpooning" processes via the Rydberg molecules Xe(³P₂) Cl(²P₃/₂) and Xe(³P₁) Cl(²P₃/₂). The latter two processes contribute to high optical gain when ion densities are low.</p> <p>A comprehensive kinetic model is developed on the basis of achieving good agreement between computed and observed optical pulse-shapes, in terms of total energy, peak power, pulse duration, delay time for onset of emission, and rise- and fall-times. The rate coefficients for electron collision processes are calculated using electron-energy distribution functions derived from Monte-Carlo electron transport simulations (electron-electron scattering is included). Calculated intrinsic laser parameters (unsaturated gain, absorption coefficient and saturation irradiance) are in good agreement with values determined from output-power measurements (employing different output couplers and in-cavity attenuators) used together with gain-saturation theory.</p> | en_US |
dc.subject | Physics | en_US |
dc.subject | Physics | en_US |
dc.title | Dynamics of a Discharge-Excited XeCl Laser | en_US |
dc.type | thesis | en_US |
dc.contributor.department | Physics | en_US |
dc.description.degree | Doctor of Philosophy (PhD) | en_US |
Appears in Collections: | Open Access Dissertations and Theses |
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fulltext.pdf | 7.08 MB | Adobe PDF | View/Open |
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