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Dissertations / Theses on the topic 'Ion source'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Bozkurt, Bilge. "Dynamic Ion Behavior In Plasma Source Ion Implantation." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607025/index.pdf.

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The aim of this work is to analytically treat the dynamic ion behavior during the evolution of the ion matrix sheath, considering the industrial application plasma source ion implantation for both planar and cylindrical targets, and then to de-velop a code that simulates this dynamic ion behavior numerically. If the sepa-ration between the electrodes in a discharge tube is small, upon the application of a large potential between the electrodes, an ion matrix sheath is formed, which fills the whole inter-electrode space. After a short time, the ion matrix sheath starts moving towards the cathod

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2

Epstein, Charles S. "Development of a polarized Helium-3 ion source for RHIC using the electron beam ion source." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/84388.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 39-40).<br>This thesis presents my work on the design and development of a source of polarized Helium-3 ions for the Relativistic Heavy Ion Collider at Brookhaven National Lab, Upton, NY. The 3He atoms will be polarized using the technique of metastability exchange optical pumping (MEOP), and will then be flowed into the newly commissioned Electron Beam Ion Source (EBIS). Fully stripped 3He++ ions will be extracted and their polari

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3

Scrivens, R. M. "Extraction of an ion beam from a laser ion source." Thesis, Swansea University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638785.

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The CERN Laser Ion Source (LIS) aims to provide a short pulse (5 μs), high current ( 10mA) and high charge state heavy ion beam (Pb<SUP>25+</SUP>) for acceleration by a LINAC and injection into the Proton Synchrotron Booster (PSB). The laser beam time profile was measured using detectors with time response of the order of 1 ns. Cross correlating of the laser pulse form and the ion beam current one fails to find any significant relation. The laser spatial profile was measured in the focal plane by a Spiricon pyroelectric camera in conjunction with a long focal length lens. In the Master Oscil

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4

Verzeroli, Elodie. "Source NAPIS et Spectromètre PSI-TOF dans le projet ANDROMEDE." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS221/document.

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Le projet ANDROMEDE a pour but de créer un nouvel instrument d’imagerie ionique sub-micrométrique et d’analyse par spectrométrie de masse, en utilisant l’impact d’ions sur des nano-objets présents à la surface des échantillons solides et plus particulièrement sur les échantillons biologiques. L’étude de ces échantillons avec l’objectif d’analyse in vitro et in vivo nécessite une préparation complexe et requiert une expérimentation à la pression atmosphérique. Cet instrument unique ouvre une nouvelle voie dans l’analyse de surfaces, complémentaire aux méthodes utilisées de nos jours.Au sein du

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5

Lisfi, Driss. "Contribution a l'etude d'une source d'ions de recul." Caen, 1987. http://www.theses.fr/1987CAEN2029.

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Dans le but de former et de transporter des faisceaux d'ions multicharges avec les ions de recul produits par impact des faisceaux du ganil dans une cible gazeuse, nous avons mesure l'energie cinetique initiale et la dispersion d'energie cinetique initiale des ions de recul d'argon et de neon de charge 9 a 16 et 7 a 9 respectivement et nous les avons trouvees tres faibles (de l'ordre de l'electron-volt). Nous avons de plus realise une source d'ions de basse energie destinee a etudier et a tester au laboratoire les elements d'optique ionique necessaires pour le transport de ces faisceaux

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6

Khodja, Hicham. "Etude, conception et realisation d'une source d'ions micro-ebit." Paris 6, 1993. http://www.theses.fr/1993PA066133.

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Les sources d'ions multicharges de type ebis fonctionnant a l'heure actuelle font toutes appel aux techniques cryogeniques pour des raisons de pompage et de compression magnetique; les couts de fabrication et d'utilisation sont par consequent relativement eleves. Il existe neanmoins un domaine ou les sources de type ebis peuvent se passer des techniques cryogeniques, celui des faibles facteurs de compression et forts courants. Dans cette optique, une source baptisee micro-ebit, derivee d'un klystron amplificateur, a ete concue et realisee afin de verifier s'il est possible de produire des ions

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7

Johnson, Samantha. "Optimizing the ion source for polarized protons." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&amp.

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Beams of polarized protons play an important part in the study of the spin dependence of the nuclear force by measuring the analyzing power in nuclear reactions. The source at iThemba LABS produces a beam of polarized protons that is pre-accelerated by an injector cyclotron (SPC2) to a energy of 8 MeV before acceleration by the main separated-sector cyclotron to 200 MeV for physics research. The polarized ion source is one of the two external ion sources of SPC2. Inside the ion source hydrogen molecules are dissociated into atoms in the dissociator and cooled to a temperature of approximately

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8

Mefo, Jane Ebelechukwu. "Langmuir probe characterisation of ion source plasmas." Thesis, University of Surrey, 2005. http://epubs.surrey.ac.uk/843557/.

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The precise conditions under which ions are generated in the ion source can have a major impact on how well the source performs, and how much of the extracted beam current can be transported. Because of the commercial focus on the repeatability and reliability of the overall ion implantation process, this vital aspect of the machine has received little scientific attention. hi order to address this issue, detailed studies of both the source and beam plasmas have been initiated. The research described in this thesis, was concerned with the former, and the characterisation of boron trifluoride (

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9

Ghalambor, Dezfuli Abdol Mohammad. "Characteristics of a laser desorption ion source." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=60065.

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The characteristics of a pulsed laser ion source have been studied. A pulse from a heating laser (Nd: YAG laser) desorbs the neutral atoms from the surface of a metal target and then a second pulse or pulses from excimer or dye lasers selectively ionize the desorbed neutrals using the Resonance Ionization Spectroscopy technique. Time-of-flight and electrostatic energy analyzer measurements have been used to study different characteristics of this ion source such as spatial, velocity, and energy distributions. These measurements reveal that although the energy spread of the basic source is rela

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10

Song, Tae Ik. "Lithium ion source for satellite charge control." Thesis, Monterey, California: Naval Postgraduate School, 1990. http://hdl.handle.net/10945/34832.

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Approved for public release; distribution unlimited.<br>A lithium ion source using thermal emission from mineral beta- eucryptite has been investigated as a possible control device for spacecraft charging. This source can be used for control of positively charged spacecraft potentials in sunlight and differentially charged spacecraft surfaces in shadow. This thesis investigates the dependence of the emitted ion current on several parameters: source temperature (power input), source bias potentials and potentials applied to simulated spacecraft geometries. Saturation current of about 5.8 micro

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11

You, Xingzhi. "An Advanced High Efficiency Non-Radiogenic Ion Source for Ion Mobility Spectrometry." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/293471.

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During the last decade, the Denton Research Group has made significant advancements in the field of real time direct vapor detection of low volatile explosives under ambient conditions. An ion source plays a crucial role in the sensitive detection of traces of compounds in gas phase by ion mobility spectrometry, but, all the current ionization techniques have significant drawbacks and do not fully satisfy all needs. To overcome the limitations associated with either hazards from a radiogenic ion source or poor reliability from the current non-radiogenic ion sources, the author of this disserta

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12

Rubin, Martin. "Development of a low energy ion source for ROSINA ion mode calibration /." [S.l.] : [s.n.], 2006. http://www.zb.unibe.ch/download/eldiss/06rubin_m.pdf.

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13

Petrov, A., A. Alexandrov, E. Kralkina, P. Nekliudova, K. Vavilin, and V. Pavlov. "Advanced Ion and Plasma Sources for Materials Surface Engineering." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35409.

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The paper presents the results of the authors many year work in the field of ion&plasma sources development. The families of DC and RF ion and plasma sources are described. The results of ion&plasma sources utilization in materials surface modification technologies are discussed. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35409

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14

Waller, David. "Ion source for high energy gamma ray source for the calibration of SNO." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq22418.pdf.

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15

Bondoc, Bebe N. "Development of a pulsed atmospheric pressure ion source." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0034/MQ64211.pdf.

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16

Bondoc, Bebe N. "Development of a pulsed atmospheric pressure ion source." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=30235.

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This thesis describes the development of a high-performance Pulsed High-Voltage Atmospheric Pressure Ion Source for coupling a mass spectrometry system with an HPLC system. This novelty of the design resides in a modified electrospray system, which in addition to its normal DC operation, provides high-voltage of up to 30kV on the capillary by introducing high-voltage pulsing, the Pulsed High-Voltage API is predicted to allow a higher liquid throughput and a reduction in background contamination while maintaining an efficient ionization of the molecules under investigation. The Pulsed High-Volt

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17

Venhaus, Thomas Joseph. "Plasma source ion implantation of high voltage electrodes." W&M ScholarWorks, 2000. https://scholarworks.wm.edu/etd/1539623981.

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Field emission and breakdown characteristics of high voltage, large area electrodes determine the performance of many vacuum-based electron sources. A corroborative project with the Thomas Jefferson National Accelerator Facility involves studying the behavior of such electrodes after nitrogen ion implantation. A Plasma Source Ion Implantation (PSII) facility is designed and constructed at William and Mary, and used to treat stainless steel electrodes. PSII is a novel implantation technique developed at the University of Wisconsin-Madison. A workpiece is submerged in a quiescent plasma of the s

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18

Tierney, C. Michael Culick F. Culick F. "Plume characteristics of a multiple ion source thruster /." Diss., Pasadena, Calif. : California Institute of Technology, 1995. http://resolver.caltech.edu/CaltechETD:etd-07112007-133241.

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19

Song, Tae Ik. "Spacecraft charge control using a lithium ion source /." Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA238272.

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Thesis (M.S. in Physics)--Naval Postgraduate School, June 1990.<br>Thesis Advisor(s): Olsen, Richard C. Second Reader(s): Heinz, Otto. "June 1990." Description based on title page as viewed on October 16, 2009. DTIC Identifier(s): Lithium Ion Source, Satellite Charge Control. Author(s) subject terms: Lithium Ion Source, Satellite Charge Control. Includes bibliographical references (p. 49-50). Also available online.

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20

Hoepfner, Patrick J. "A Monte Carlo calculation of virtual source size and energy spread for a liquid metal ion source /." Full text open access at:, 1985. http://content.ohsu.edu/u?/etd,77.

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21

Cinar, Kamil. "Design And Construction Of A Microwave Plasma Ion Source." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12612910/index.pdf.

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This thesis is about the designing and constructing a microwave ion source. The ions are generated in a thermal and dense hydrogen plasma by microwave induction. The plasma is generated by using a microwave source with a frequency of 2.45 GHz and a power of 700 W. The generated microwave is pulsing with a frequency of 50 Hz. The designed and constructed microwave system generates hydrogen plasma in a pyrex plasma chamber. Moreover, an ion extraction unit is designed and constructed in order to extract the ions from the generated hydrogen plasma. The ion beam extraction is achieved and ion curr

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22

Cuong, P. V. "DEVELOPMENT OF A NEW SURFACE ION-SOURCE AND ION GUIDE IN THE ALTO PROJECT." Phd thesis, Université Paris Sud - Paris XI, 2010. http://tel.archives-ouvertes.fr/tel-00546146.

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Pour le projet ALTO à l'IPN d'Orsay, comme pour d'autres laboratoires qui exploitent la technique ISOL pour produire des faisceaux radioactifs intenses et purs, il est crucial, lorsque des isotopes de courte durée de vie sont produits dans des cibles épaisses, de réaliser des cibles et des sources d'ions avec des bonnes propriétés de sortie et de haute efficacité. Ainsi les études de R&D sur les cibles et les sources d'ions sont très importantes pour l'optimisation de la production, la sélectivité et la sortie des isotopes d'intérêt. Ces études sont aussi nécessaires vers les futurs installati

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23

Fedkiw, Timothy Peter. "Characterization of an iodine-based ionic liquid ion source and studies on ion fragmentation." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62488.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 71-73).<br>Electrosprays are a well studied source of charged droplets and ions. A specific subclass is the ionic liquid ion source (ILIS), which produce ion beams from the electrostatically stressed meniscus of ionic liquids. ILIS have several applications, two of which include space propulsion and focused ion beam technologies. An ILIS using the 1-butyl-3-methylimidazolium iodide (BMI-I) is characterized with a

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24

Cuong, Phan Viet. "Development of a new surface ion-source and ion guide in the ALTO project." Paris 11, 2009. http://www.theses.fr/2009PA112330.

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Pour le projet ALTO à l'IPN d'Orsay, comme pour d'autres laboratoires qui exploitent la technique ISOL pour produire des faisceaux radioactifs intenses et purs, il est crucial, lorsque des isotopes de courte durée de vie sont produits dans des cibles épaisses, de réaliser des cibles et des sources d'ions avec des bonnes propriétés de sortie et de haute efficacité. Ainsi les études de R&D sur les cibles et les sources d'ions sont très importantes pour l'optimisation de la production, la sélectivité et la sortie des isotopes d'intérêt. Ces études sont aussi nécessaires vers les futurs instal

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25

Tyrroff, Horst, G. Zschornack, Hans Wirth, and Dietmar Henke. "Output Maximization of a 7.25 GHz ECR Ion Source." Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-31592.

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26

Carroll, David C. "Laser-driven ION acceleration : source optimisation and optical control." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501894.

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27

Oldham, James Martin. "Combination of a cold ion and cold molecular source." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:ef33adcb-609a-4329-b4d8-aca8a1c48661.

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This thesis describes the combination of two sources of cold atomic or molecular species which can be used to study a wide range of ion-molecule reactions. The challenges in forming these species and in determining the fate of reactive events are explored throughout. Reactions occur in a volume within a radio-frequency ion trap, in which ions have previously been cooled to sub-Kelvin temperatures. Ions are laser-cooled, with migration of ions slowed sufficiently to form a quasi-crystalline spheroidal structure, deemed a Coulomb crystal. Fluorescence emitted as a consequence of laser-cooling is

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28

Tyrroff, Horst, G. Zschornack, Hans Wirth, and Dietmar Henke. "Output Maximization of a 7.25 GHz ECR Ion Source." Forschungszentrum Rossendorf, 1996. https://hzdr.qucosa.de/id/qucosa%3A21986.

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29

Jacob, Georg [Verfasser]. "Ion implantation and transmission microscopy with nanometer resolution using a deterministic ion source / Georg Jacob." Mainz : Universitätsbibliothek Mainz, 2017. http://d-nb.info/1136591419/34.

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30

Segal, Matthew. "Development of an ion transport system for singly charged ion injection into an electron string ion source (ESIS) charge-breeder." Doctoral thesis, Faculty of Science, 2021. http://hdl.handle.net/11427/33024.

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A 1+ ion delivery system was designed and constructed for the purpose of ion injection into the Electron String Ion Source (ESIS) charge-breeder at the Joint Institute for Nuclear Research (JINR) in Dubna, Russia. The transport system was initially developed at iThemba LABS in Cape Town. This system includes a Liquid Metal Ion Source (LMIS) and an ion extraction and focusing system. The ion delivery system is used to produce Ga+ and Au+ ions which are transported through a beam-line system consisting of charged particle optics such as focusing einzel-lenses, an electrical quadrupole switchyard

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31

Lawrie, Scott. "Understanding the plasma and improving extraction of the ISIS Penning H⁻ ions source." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:1648761a-57b1-4d6f-8281-9d1c36ccd46a.

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A Penning-type surface-plasma negative hydrogen (H<sup>-</sup>) ion source has been delivering beam at the ISIS pulsed spallation neutron and muon facility for over thirty years. It is one of the most powerful and well-renowned H<sup>-</sup> sources in the world. Although long-term experience has allowed the source to be operated reliably and set up in a repeatable way, it is treated as something of a 'black box': the detailed plasma physics of why it works has always been unclear. A vacuum Vessel for Extraction and Source Plasma Analyses (VESPA) has been developed to understand the ISIS ion s

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32

Tumey, Scott Joseph. "A gas-injection negative ion source for accelerator mass spectrometry." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1977.

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Thesis (Ph. D.)--University of Maryland, College Park, 2004.<br>Thesis research directed by: Chemistry. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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33

Melvin, Michael Edward. "Design and evaluation of ion source for satellite charge control." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23620.

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Approved for public release; distribution is unlimited<br>This thesis describes the design of a new spacecraft charge control device that incorporates a solid ion source made of lithium or potassium salt impregnated into a porous tungsten plug. The ion source was configured with a reentrant thin-wall heat shield to reduce heat loss and an experimental thermocouple imbedded in the plug to accurately measure emission temperature. The initial design of the change control device included an extraction grid, deceleration grid, and an electron filament source. Experiments were conducted on the ch

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34

Ryu, Chong Soo. "Satellite charge control with lithium ion source and electron emission." Thesis, Monterey, California: Naval Postgraduate School, 1990. http://hdl.handle.net/10945/27660.

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Approved for public release; distribution is unlimited.<br>A lithium ion source using thermal emission from a Beta-eucryptite structure has been investigated as a possible control device for spacecraft charging. This source can be used for control of positively charged spacecraft potentials in sunlight and differentially charged spacecraft surfaces in shadow. This thesis investigates the emission characteristics of lithium ion sources in conjunction with two kinds of electron sources and simulates spacecraft charge control. A 0.6-in. lithium ion source produced currents up to 33 micro Amps at

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Ryu, Chong S. "Satellite charge control with lithium ion source and electron emission." Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA231956.

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Thesis (M.S. in Physics)--Naval Postgraduate School, December 1990.<br>Thesis Advisor: Olsen, Richard C. Second Reader: Heinz, Otto. "December 1990." Description based on title screen as viewed on April 2, 2010. DTIC Identifier(s): Spacecraft charging, control systems, lithium beams, theses. Author(s) subject terms: Satellite charge control, lithium ion source, electron source. Includes bibliographical references (p. 91-93). Also available in print.

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36

Saquilayan, Glynnis mae Q., and Glynnis-mae Saquilayan. "Ion charge state distribution in a laser produced bounded plasma." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13059541/?lang=0, 2017. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13059541/?lang=0.

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A laser ion source was investigated for a laser produced spatially bound plasma and the production of cluster ions. The design of a unique geometry for the target was fabricated to have a hollow cylindrical structure where the plasma is ignited inside the narrow volume. The study clarified the difference in the plasma dynamics of the laser ion source operation using the hollow cylinder target as the plasma was allowed to interact with the target surface. The proposed scheme, aiming to produce a low plasma temperature condition, was observed to the increase the probability for agglomeration and

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Steer, Edward. "Development and characterisation of a cold molecule source and ion trap for studying cold ion-molecule chemistry." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:13c3a622-ba78-4a53-902c-666ec461f708.

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A novel apparatus, combining buffer-gas cooling, electrostatic velocity selection and ion trapping, has been constructed and characterised. This apparatus is designed to investigate cold ion-molecule chemistry in the laboratory, at a variable translational and internal (rotational) temperature. This improves on previous experiments with translationally cold but rotationally hot molecule sources. The ability to vary the rotational temperature of cold molecules will allow for the experimental investigation of post-Langevin capture theories.

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Chauvin, Nicolas. "La transformation d'état de charge 1+->n+ pour l'accélération des ions radioactifs." Grenoble 1, 2000. http://www.theses.fr/2000GRE10082.

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La production de noyaux radioactifs est realisee par bombardement d'une cible par un faisceau primaire de proton, de neutrons ou d'ions stables. Afin d'obtenir des faisceaux d'ions radioactifs de plusieurs mev par nucleons, il convient tout d'abord de les multi-ioniser. Le principe de la methode 1+/n+ consiste a separer la production des elements radioactifs de leur multi-ionisation. Une cible de production d'elements radioactifs est associee a une source d'ions monocharges (ensemble cible-source). Le faisceau d'ions radioactifs 1+ ainsi produit est injecte a basse energie (quelques dizaines d

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Sheikh, Shaheen Anwar. "Development of an ECR ion source with a high ionization efficiency." Thesis, University of Surrey, 1989. http://epubs.surrey.ac.uk/844445/.

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Separation of rare or expensive isotopes, whether radioactive or stable, requires a high efficiency of the separation process. Electromagnetic isotope separation is the most widely-used of all separation processes. Its separation efficiency depends mainly upon the ionization efficiency of its ion source. An Electron Cyclotron Resonance (ECR) ion source has been developed for the separation of both stable and radioactive isotopes on account of its high ionization efficiencies. The maximum ionization efficiencies achieved with the ECR ion source for singly charged ions for a range of materials w

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40

Martins, Dália Teresa Al-Alavi. "Compact ion-source based on superionic rubidium silver iodide (RbAg4I5) solid electrolyte." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/11037.

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Dissertação para obtenção do Grau de Mestre em Engenharia Física<br>A compact ion-beam source based on rubidium silver iodide (RbAg4I5) solid electrolyte, deposited on a sharpened silver tip, has been developed and studied. Through an accelerating potential above 10 kV, established between emitter and collector, silver positive ions move through the electrolyte towards the emitting surface, where they are emitted from and accelerated. Via partial redox reaction occurring at the silver/RbAg4I5 interface, silver atoms are oxidised into Ag+ ions and migrate into the electrolyte, compensating the

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Nassar, Rafat Mohammad. "A new tritium monitor design based on plasma source ion implantation technique." Thesis, University of St Andrews, 1997. http://hdl.handle.net/10023/13373.

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Tritium is an important isotope of hydrogen. The availability of tritium in our environment is manifest through both natural and artificial sources. Consequently, the requirement for tritium handling and usage will continue to increase in the future. An important future contributor is nuclear fusion power plants and facilities. Essential safety regulations and procedures require effective monitoring and measurements of tritium concentrations in workplaces. The unique characteristics of tritium impose an important role on the criteria for its detection and measurement. As tritium decays by the

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42

Kline, John L. "Slow wave ion heating and parametric instabilities in the HELIX helicon source." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2292.

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Thesis (Ph. D.)--West Virginia University, 2002.<br>Title from document title page. Document formatted into pages; contains viii, 176 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references.

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43

Zhu, Yu. "Modeling of a microwave plasma electron source for neutralization of ion thrusters." Toulouse 3, 2013. http://thesesups.ups-tlse.fr/1970/.

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Les sources électroniques sont utilisées pour neutraliser le flux d'électrons sortant d'un propulseur ionique. Les neutraliseurs conventionnels sont des cathodes creuses thermoioniques. Elles sont malheureusement fragiles, chères et très sensibles à la contamination par des espèces étrangères comme l'oxygène pour les orbites basses. Ainsi, des efforts de recherche autour des sources électroniques sont en cours. A l'aide d'un modèle analytique global ainsi qu'un modèle numérique auto-cohérent, je me suis attaché, durant ma thèse, à comprendre la physique qui régit les sources plasmas micro-onde

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Oudini, Noureddine. "Modélisation d'une source d'ions à effet Hall pour des applications de traitement de surface." Phd thesis, Toulouse 3, 2011. http://thesesups.ups-tlse.fr/1368/.

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Dans les sources d'ions de type EHIS " End-Hall Ion Source " un faisceau ionique est extrait d'un plasma magnétisé sans l'utilisation d'un système de grilles d'extraction. Les sources EHIS sont essentiellement utilisées dans des procédés de traitement de surface. Dans ce type de sources, le plasma est généré par l'application d'une tension entre les électrodes afin de créer une décharge DC. La présence, dans le plasma, d'un champ magnétique parallèle à une anode conique réduit la mobilité électronique dans la direction perpendiculaire aux lignes de champ magnétique. La chute de conductivité él

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Marriott, P. "Angular and mass resolved energy distribution measurements with a gallium liquid metal ion source." Thesis, University of Salford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376877.

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Forbes, Thomas Patrick. "Electrohydrodynamics and ionization in the Array of Micromachined UltraSonic Electrospray (AMUSE) ion source." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33852.

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The focus of this Ph.D. thesis is the theoretical, computational, and experimental analysis of electrohydrodynamics and ionization in the Array of Micromachined UltraSonic Electrospray (AMUSE) ion source. The AMUSE ion source, for mass spectrometry (MS), is a mechanically-driven, droplet-based ion source that can independently control charge separation and droplet formation, thereby conceptually differing from electrospray ionization (ESI). This aspect allows for low voltage soft ionization of a variety of analytes and flexibility in the choice of solvents, providing a multifunctional interfac

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O'Connor, Gavin Thomas. "Development of a low pressure-inductively coupled plasma-ion source for mass spectrometry." Thesis, University of Plymouth, 1998. http://hdl.handle.net/10026.1/1764.

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A low pressure-inductively coupled plasma (LP-ICP) ion source has been investigated for the production of atomic and molecular ions for mass spectrometry (MS). A dedicated LPICP- MS was constructed, by modifying a Hewlett Packard mass selective detector, to detect ions from the LP-ICP. The ion sampling interface and ion optics were designed using established theory and the use of a computer simulation program. Perfluorotributylamine was continuously introduced into the LP-ICP, via a molecular leak, and the ion sampling interface, plasma forward power, and plasma gas flow rates, were optimised.

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Balkey, Matthew M. "Optimization of a helicon plasma source for maximum density with minimal ion heating." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1686.

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Thesis (Ph. D.)--West Virginia University, 2000.<br>Title from document title page. Document formatted into pages; contains v, 127 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 94-98).

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Monetti, Alberto. "Design and development of the target-ion source system for the SPES project." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3426200.

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The most important project of LNL (National Laboratory of Legnaro), one of the four Laboratory of INFN (National Institute for Nuclear Physics), is the SPES project, now at the construction phase. The aim of this new facility is to produce Radioactive Ion Beams in the neutron rich side of the so-called “valley of stability”. This is a very challenging project since it requires a lot of knowledge and studies from physical, chemical, engineering points of view. The core of the facility is a uranium carbide target mantained at high temperature (above 2000°C) which produces by fission radioactive

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Šamořil, Tomáš. "Vývoj atomárních a iontových svazkových zdrojů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228713.

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The objective of this master thesis was to provide the optimization of an ion-atom beam source for the improvement of its properties. The improvement of the parameters increases the efficiency of the source during the deposition of gallium nitride ultrathin films (GaN) being important in microeletronics and optoelectronics. After optimization, the depositions of GaN ultrathin films on Si(111) 7x7 at lower temperatures (

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