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Dissertations / Theses on the topic 'Vacuum ultraviolet lasers'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Richmond, A. M. "Vacuum ultraviolet discharge excited lasers." Thesis, University of Oxford, 1987. http://ora.ox.ac.uk/objects/uuid:3a09736b-bffb-4ac9-b57c-fb9daa1c8484.

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The thesis concerns experimental studies of discharge excited lasers operating in the vacuum ultraviolet (VUV) region of the spectrum. The known molecular fluorine laser operating at 157nm, on a bound- to-bound transition of the F<sub>2</sub> molecule was selected for initial study. As a result of the work reported here the energy per pulse was increased by a factor of five (10mJ to 50mJ) from that of earlier F<sub>2</sub> lasers. Similary the working lifetime of the gas mixture was increased from a few shots to several thousand by the application of cryogenic gas purification techniques. Thes

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2

Cashmore, Julian. "VUV laser oscillation in optically pumped LaFâ†3:Nd'3'+." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307054.

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3

Price, Roosevelt Jerome. "Photodissociation studies with vacuum ultraviolet lasers by means of ion velocity imaging /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.

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4

Wang, Peng. "State-selected and state-to-state photoionization-photoelectron spectroscopy using two-color infrared and vacuum ultraviolet lasers /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.

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5

Miller, Bradley E. "Vacuum ultraviolet laser spectroscopy of small molecules." Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/27891.

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6

Mao, Dunmin. "Vacuum ultraviolet laser spectroscopy of the rare gas dimers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0015/NQ58150.pdf.

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7

Hooker, Simon Martin. "VUV laser oscillation in optically pumped nitric oxide." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258147.

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8

Flexen, Alexander C. "Vacuum ultraviolet laser spectroscopy of diatomic halogen and interhalogen molecules." Thesis, University of Edinburgh, 1999. http://hdl.handle.net/1842/13824.

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The Rydberg and ion-pair states of Cl<SUB>2</SUB>, Br<SUB>2</SUB>, I<SUB>2</SUB>, ICl and IBr have been studied using a range of laser-based spectroscopic techniques, in the vacuum-ultraviolet (VUV) energy region. The [2+1] resonance enhanced multiphoton ionization (REMPI) spectrum of Br<SUB>2</SUB> has been re-examined in the region 56 000-86 000 cm<SUP>-1</SUP>. Rydberg series, previously assigned to components of the <I>ns</I> Rydberg states have been reassigned to components of the (<I>n</I>-2)d Rydberg states, for <I>n</I>≥6. The lowest 5s Rydberg state components on each ionic core remai

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9

HUTH, THOMAS CARL. "ANALYTICAL MASS SPECTROMETRY WITH A SELECTIVE VACUUM ULTRAVIOLET PHOTOIONIZATION SOURCE." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183916.

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The vacuum ultraviolet molecular hydrogen laser is evaluated as a selective ion source for analytical mass spectrometry of easily-ionized compounds. The types of compounds ionized below the photon energy of 7.8 eV include polynuclear aromatic hydrocarbons, and many amines and nitrogen-containing heterocycles. The latter two categories encompass a large number of pharmaceuticals and drugs of abuse. H₂ laser photoionization produces parent molecular ions only, for all compounds studied thus far. Selectivity of the threshold photoionization process is very high, as compounds within as little as 0

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10

Steinmann, C. M. (Christine Margarete). "Vacuum ultraviolet laser spectroscopy of CO molecules in a supersonic jet." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53709.

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Thesis (PhD)--Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: A tunable narrow-bandwidth laser source combined with a supersonic gas jet as sample is wellsuited for obtaining high-resolution spectra of cold isolated molecules and complexes. In the present study such a laser source in the vacuum ultraviolet was applied to the spectroscopic investigation of rare carbon monoxide (CO) isotopomers and CO-noble gas van der Waals complexes in supersonic gas pulses seeded with natural CO gas. Tunable coherent vacuum ultraviolet radiation was generated by two-photon resonant fourwave sum-fre

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11

Huang, Ping. "Diagnostics in VUV laser spectroscopy." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/2244.

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Thesis (MSc (Physics))--University of Stellenbosch, 2005.<br>A tunable vacuum ultra-violet (VUV) laser source was recently developed for VUV spectroscopy using state selective excitation and total fluorescence detection. The VUV laser source makes use of a four-wave mixing process to provide tunable VUV radiation for the electronic excitation of the molecules. The theory of four-wave mixing, with the emphasis on parameters that are important for our experimental setup to generate efficient tunable VUV radiation is discussed. The experimental setup, and in particular the metal vapor heat-

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12

Woo, Hin-Koon. "Two-color photoionization-photoelectron spectroscopy using tunable vacuum ultraviolet and infrared laser sources /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.

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13

Du, Plessis Anton. "Laser spectroscopy of the Fourth Positive System of carbon monoxide isotopomers." Thesis, Link to the online version, 2006. http://hdl.handle.net/10019.1/1219.

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14

Kubitza, Simon. "Laser-Induced Breakdown Spectroscopy in the Vacuum-Ultraviolet Wavelength Regime for the Application in Planetary Exploration." Doctoral thesis, Humboldt-Universität zu Berlin, 2021. http://dx.doi.org/10.18452/22543.

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Diese Arbeit handelt von der Anwendbarkeit laserinduzierter Plasmaspektroskopie (englisch: laser-induced breakdown spectroscopy, LIBS) mit Detektion im vakuumultravioletten Spektralbereich (VUV), im Folgenden VUV-LIBS genannt, im Bereich der Planetenforschung. Für LIBS wird ein gepulster Laser auf die zu untersuchende Probe fokussiert. Dabei wird Probenmaterial abgetragen, verdampft und teilweise ionisiert. Die im Plasma enthaltenen Atome und Ionen werden elektronisch angeregt und strahlen in der Folge Licht charakteristischer Wellenlängen ab, welches spektroskopisch analysiert werden kann. Di

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15

Dickenson, Gareth David. "Development of a tuneable laser source in the vacuum ultraviolet and its applications to spectroscopy." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/1827.

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Thesis (MSc (Physics))--Stellenbosch University, 2008.<br>Third harmonic generation (THG) in a metal vapour is a nonlinear optical interaction that facilitates the generation of light in the vacuum ultraviolet (VUV) portion of the electromagnetic spectrum. The requirement of the metal vapour medium is that it has a suitably large third order nonlinear susceptibility. The third order susceptibility is further enhanced by a two photon resonance. Zinc and magnesium vapours are such nonlinear media. The THG process can be phase matched by mixing the metal vapour with a noble gas in a speci c

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16

Paul, Thomas Alfred. "Development and spectroscopic applications of a solid-state vacuum ultraviolet laser system in atomic and molecular physics /." Zürich : ETH, 2008. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17814.

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17

Bahng, Mi-Kyung. "High-resolution photoelectron and photoion spectroscopic studies of ammonia using two-color infrared-vacuum ultraviolet laser systems /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.

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18

Kubitza, Simon [Verfasser]. "Laser-Induced Breakdown Spectroscopy in the Vacuum-Ultraviolet Wavelength Regime for the Application in Planetary Exploration / Simon Kubitza." Berlin : Humboldt-Universität zu Berlin, 2021. http://d-nb.info/1232239542/34.

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19

Nortje, Anton Christiaan. "Development and application of tunable VUV laser sources." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80302.

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Thesis (MSc)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: A tunable narrow-bandwidth vacuum ultra violet laser source was developed and characterised. Two-photon resonant four-wave sum-frequency mixing of two pulsed dye laser beams in magnesium vapour was used to generate the VUV laser light. A heat pipe oven with a concentric design was incorporated to provide a magnesium vapour column of around 30 cm in length with a sufficiently stable temperature and appropriate vapour pressure for efficient VUV production. This is a longer nonlinear medium length than previously produced in ou

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20

Matindi, Tresor. "Development of VUV tunable laser spectroscopy techniques for characterizing calcium fluoride." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95804.

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Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: The large band gap (approximately 11.5-12.1 eV) and high transmission of calcium fluoride (CaF2) crystal in the ultraviolet (UV) and vacuum ultraviolet (VUV) region makes it an important material for optics for laser applications in UV. However, CaF2 degrades during long exposure to UV irradiation due to defect generation. The formation of selftrapped excitons (STE) is considered the first step in defect generation. In this project the possibility of observing STE states in CaF2 using a narrow bandwidth tunable VUV laser

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21

Hrabal, Zdeněk. "Modul pro detekci lehkých prvků v železných slitinách metodou spektroskopie laserem buzeného plazmatu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-392849.

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Tato diplomová práce je zaměřena na analýzu lehkých prvků (tj. uhlík, sýra a fosfor) v železných slitinách pomocí metody laserem indukovaného plazmatu (LIBS). Hlavním cílem je vyvinout a implementovat nový modul, který bude umožňovat analýzu v hluboké ultrafialové oblasti (VUV), což je nezbytné jak pro stanovení chemického složení lehkých prvků v ocelích tak pro mnoho dalších aplikací metody LIBS. V první části je vytvořen přehled moderních přístupů optické emisní spektroskopie (OES) a rovněž jsou shrnuty tradiční techniky používané v metalurgii pro analýzu ocelí. Teorie absorpce ultrafialovéh

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22

Terschlüsen, Joachim A. "Constructing and Commissioning HELIOS – A High Harmonic Generation Source for Pump-Probe Measurements with sub 50 fs Temporal Resolution : The Development of Experimental Equipment for Extreme Ultraviolet Spectroscopy." Doctoral thesis, Uppsala universitet, Molekyl- och kondenserade materiens fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-281298.

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This thesis presents HELIOS, an in-house laboratory for time-resolved pump-probe spectroscopy with extreme-ultraviolet (XUV) probe radiation. A wide span of pump wavelengths can be generated using commercial laser equipment while XUV probe radiation is generated via a high harmonic generation process in a noble gas delivering probe photons with energies between 20 eV and 72 eV. The XUV beam path features a time-preserving monochromator and was constructed and built in-house. HELIOS features an overall time resolution of about 50 fs when using 800 nm pump and 41 eV probe photons. An energy reso

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23

Wu, Yu-Heng, and 吳瑜恆. "Generation of deep ultraviolet/vacuum ultraviolet lights by anti-Stokes Raman shifting of Nd:YAG laser in hydrogen gas." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/74547370472986870336.

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碩士<br>國立交通大學<br>應用化學系碩博士班<br>105<br>Using deep ultraviolet/vacuum ultraviolet light (DUV/VUV) as a universal probing method to ionize the photoexcited reactants and photofragments is beneficial in the photodissociation dynamics studies. Since it avoids the restricted probing Frank-Condon region of excited reactants and the cracking of photofragments in the utilizing of UV multi-photoionization. However, the low photon flux and narrow wavelength tunability of VUV light are still challenging for laser based VUV light source to be applied in the ionization of dilute and various photoproducts. He

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24

Wang, Cheng-Shiuan, and 王政璿. "Using homemade monochromator to produce the isolated 118.2 nm picosecond vacuum ultraviolet laser." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/87848952966851174837.

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碩士<br>國立交通大學<br>應用化學系碩博士班<br>103<br>Since the beginning of the 1970s, with the development of nonlinear optics and laser system, light source for experiment can be expanded from long wavelength range to short wavelength band. Among them, vacuum ultraviolet light is a very good ionization source, and has already been used in many researches. For example, Vacuum-Ultraviolet-Ionization-detected-infrared predissociation spectroscopy (VUV-ID-IRPDS) of clusters can be used to understand intermolecular structures and interactions at the microscopic level, and the Resonance-enhanced Multiphoton Ioniza

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25

Surpaneni, Yamini Allen Susan D. "Laser induced desorption time of flight mass spectrometer analysis of adsorbed surface contaminants on vacuum ultraviolet lithography optic materials." 2003. http://etd.lib.fsu.edu/theses/available/etd-09182003-184527.

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Thesis (M.S.)--Florida State University, 2003.<br>Advisor: Dr. Susan Davis Allen, Florida State University, College of Engineering, Dept. of Electrical and Computer Engineering. Title and description from dissertation home page (viewed Apr. 12, 2004). Includes bibliographical references.

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