Relevant bibliographies by topics / Thermionics / Dissertations / Theses
To see the other types of publications on this topic, follow the link: Thermionics.

Dissertations / Theses on the topic 'Thermionics'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Thermionics.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Humphrey, Tammy Ellen Physics Faculty of Science UNSW. "Mesoscopic quantum ratchets and the thermodynamics of energy selective electron heat engines." Awarded by:University of New South Wales. Physics, 2003. http://handle.unsw.edu.au/1959.4/19186.

Full text
Abstract:
A ratchet is an asymmetric, non-equilibrated system that can produce a directed current of particles without the need for macroscopic potential gradients. In rocked quantum electron ratchets, tunnelling and wave-reflection can induce reversals in the direction of the net current as a function of system parameters. An asymmetric quantum point contact in a GaAs/GaAlAs heterostructure has been studied experimentally as a realisation of a quantum electron ratchet. A Landauer model predicts reversals in the direction of the net current as a function of temperature, amplitude of the rocking voltage,
APA, Harvard, Vancouver, ISO, and other styles
2

Tanner, Peter Godfrey. "Some developments of thermionic converters." Thesis, King's College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248055.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Hirt, Benjamin David. "Impact of Additives on Thermionic Cathodes." Ohio University Honors Tutorial College / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ouhonors1524832507214002.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Vashaee, Daryoosh. "High efficiency heterostructure integrated thermionic coolers /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2004. http://uclibs.org/PID/11984.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Lough, Benjamin C. C. "Investigations into thermionic cooling for domestic refrigeration." School of Engineering Physics - Faculty of Engineering, 2004. http://ro.uow.edu.au/theses/230.

Full text
Abstract:
Thermionic refrigeration using semiconductor heterostructures is examined theoretically and experimentally. A theory of single-barrier devices is first developed where two classes of single-barrier devices are defined and compared. So-called class 1 devices are found to always perform better. A theory of multiple-barrier devices based on class 1 barriers is then developed using a numerical solution. Experimentally, three generations of 10-barrier devices based on A1(subscript x)Ga(subscript 1-x)As-GaAs heterostructures were made and electrically characterised. This material is by no means idea
APA, Harvard, Vancouver, ISO, and other styles
6

Koeck, Franz Alexander. "Thermionic Emission from Doped and Nanocrystalline Diamond." NCSU, 2003. http://www.lib.ncsu.edu/theses/available/etd-04032003-161449/.

Full text
Abstract:
Microwave Plasma assisted Chemical Vapor Deposition (MPCVD) has been utilized to synthesize nitrogen doped and intrinsic nanocrystalline diamond films to investigate thermionic field emission behavior. Sulfur-doped nanocrystalline diamond films prepared by hot filament chemical vapor deposition (HFCVD) have been included in the thermionic field emission measurements. The samples were imaged in UHV by photo electron emission microscopy (PEEM) using a UV Hg lamp for photoemission excitation. The same instrument was used to obtain the thermionic-field emission electron microscopy images (T-FEEM)
APA, Harvard, Vancouver, ISO, and other styles
7

Stephen, Alexander. "Enhancement of thermionic cooling using Monte Carlo simulation." Thesis, University of Aberdeen, 2014. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=210113.

Full text
Abstract:
Advances in the field of semiconductor physics have allowed for rapid development of new, more powerful devices. The new fabrication techniques allow for reductions in device geometry, increasing the possible wafer packing density. The increased output power comes with the price of excessive heat generation, the removal of which proves problematic at such scales for conventional cooling systems. Consequently, there is a rising demand for new cooling systems, preferably those that do not add large amount of additional bulk to the system. One promising system is the thermoelectric (TE) cooler wh
APA, Harvard, Vancouver, ISO, and other styles
8

Larson, Gregg D. "Two-dimensional modeling of a proposed auxilliary ionization scheme for thermionic converters." Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/15964.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Day, Christopher M. "Field enhanced thermionic emission from oxide coated carbon nanotubes." Virtual Press, 2006. http://liblink.bsu.edu/uhtbin/catkey/1348860.

Full text
Abstract:
A cathode structure was demonstrated that utilizes aligned carbon nanotubes (CNTs) to improve the thermionic electron emission by increasing the field enhancement of the cathode surface. Aligned CNTs were grown on the surface of a tungsten substrate by plasma enhanced chemical vapor deposition. The tungsten-CNT structure was further coated with a thin film of low work function emissive materials by magnetron sputtering. Numerous cathodes with varying CNT morphology and oxide layer thickness were created. The field and thermionic emission of the cathodes were tested in order to study the effect
APA, Harvard, Vancouver, ISO, and other styles
10

SCHOENEMAN, DONALD WARREN. "COMPUTER-AIDED DESIGN OF THERMIONIC INTEGRATED CIRCUIT ACTIVE DEVICES." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/188077.

Full text
Abstract:
Two computer-aided design methods are described in this dissertation for the design of Thermionic Integrated Circuits (TIC). Such circuits combine vacuum tube techniques with modern integrated circuit techniques to produce microminiature vacuum tube circuits, with possibly hundreds of vacuum triodes on a single substrate. The first method described in the line charge approximation technique in which the TIC devices are modelled as collections of line charges. A TIC is produced by evaporating metal electrodes on one or two sapphire substrates. The entire structure is heated to about 850°C so th
APA, Harvard, Vancouver, ISO, and other styles
11

McKinstry, Kevin Dale. "Interaction of oxygen with a LaBb6s(310) surface." Oregon Health & Science University, 1985. http://content.ohsu.edu/u?/etd,89.

Full text
Abstract:
M.S.<br>Applied Physics<br>The interaction of oxygen with the (310) surface of LaB[subscript 6] has been investigated using Auger electron spectroscopy and mass spectrometric analysis. Measurements were made on both preadsorbed layers of oxygen and in fixed oxygen pressures. Desorption products observed were BO, B2O2, B2O3, and LaO. Oxygen saturation of the surface at room temperature was observed with adsorptions of 50L. Oxides on the surface appear as B2O3 and an unidentified lanthanum bearing oxide. Temperature and pressure dependencies of the desorption products were studied in detail. Fac
APA, Harvard, Vancouver, ISO, and other styles
12

McKinstry, Kevin Dale. "Interaction of oxygen with a LaB₆(310) surface /." Full text open access at:, 1985. http://content.ohsu.edu/u?/etd,89.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

Hickey, Thomas R. "Temperature dependence of dark current in quantum well infrared detectors." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Jun%5FHickey.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
14

Halliwell, Sarah Clare. "Characterisation of co-doped CVD diamond for potential thermionic applications." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.715781.

Full text
APA, Harvard, Vancouver, ISO, and other styles
15

Torgasin, Konstantin. "Study on Methods for Performance Improvement of Thermionic RF Gun." Kyoto University, 2019. http://hdl.handle.net/2433/236633.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Chen, B. L. B. "High-brightness limited-area thermionic electron sources for microscopy and lithography." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597531.

Full text
Abstract:
Electron Microscopy and Electron Beam Lithography Systems are widely used in industry and research. The ultimate performance of such systems is determined by the brightness of the source from which the electrons are derived, a higher brightness allowing greater resolution at a given probe current. In addition to brightness, lithographic systems frequently require high absolute current. This dissertation addresses theoretically and experimentally the formation and characteristics of electron beams with a brightness of 10<SUP>6</SUP>A/cm<SUP>2</SUP>-sr or more using limited-area thermionic sourc
APA, Harvard, Vancouver, ISO, and other styles
17

Fuhrman, Brian Thomas. "Fabrication of advanced thermionic emitters using laser chemical vapor deposition-rapid prototyping." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/17048.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Swartzentruber, Phillip D. "MICROSTRUCTURE AND WORK FUNCTION OF DISPENSER CATHODE COATINGS: EFFECTS ON THERMIONIC EMISSION." UKnowledge, 2014. http://uknowledge.uky.edu/cme_etds/41.

Full text
Abstract:
Dispenser cathodes emit electrons through thermionic emission and are a critical component of space-based and telecommunication devices. The emission of electrons is enhanced when coated with a refractory metal such as osmium (Os), osmium-ruthenium (Os-Ru), or iridium (Ir). In this work the microstructure, thermionic emission, and work function of thin film Os-Ru coatings were studied in order to relate microstructural properties and thermionic emission. Os-Ru thin film coatings were prepared through magnetron sputtering and substrate biasing to produce films with an array of preferred orienta
APA, Harvard, Vancouver, ISO, and other styles
19

Vaughn, Joel M. "Thermionic Electron Emission Microscopy Studies of Barium and Scandium Oxides on Tungsten." Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1279814656.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Barber, Daniel. "Analytical interfacial studies of double carbonate thermionic oxide cathodes over accelerated operational life." Thesis, University of Surrey, 2005. http://epubs.surrey.ac.uk/843464/.

Full text
Abstract:
Cathode-ray tubes (CRT) have been used for the last 70 years and are expected to be incorporated in television sets for a further 15 years. The oxide cathode, located within the CRT, generates electrons which are focused and scanned across a phosphorescent screen to produce an image. The oxide cathode consists of a porous BaO/SrO spray layer deposited on a Ni alloy base. During operation, the Ni cap is heated. Activators (alloying additions, such as A1 and Mg) reduce BaO to 'free' Ba, which migrates to the emissive oxide surface, reducing the work function. It has been postulated for sometime
APA, Harvard, Vancouver, ISO, and other styles
21

MUTHIAH-NAKARAJAN, VENKATARAMAN. "A GENERALIZED THERMIONIC-TUNNELING MODEL OF CARRIER INJECTION ACROSS A METAL/POLYMER INTERFACE." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1054324006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

Mackie, William Ansel. "Preparation and surface characterization of zirconium carbide single crystals /." Full text open access at:, 1987. http://content.ohsu.edu/u?/etd,147.

Full text
APA, Harvard, Vancouver, ISO, and other styles
23

Khoshaman, Amir Hossein. "Self-consistent Vlasov-Poisson analysis of carrier transport in vacuum-based thermionic/thermoelectronic devices." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58943.

Full text
Abstract:
Thermionic conversion involves the direct conversion of heat, including light-induced heat, from a source such as solar energy, to electricity. The progress of thermionic converters has been limited by issues such as the space charge effect and lack of materials with desirable mechanical, electrical and thermal properties. Nanotechnology could help address some of the main challenges that thermionic converters encounter. However, existing models, which were developed for macroscopic converters, are not adequate for many aspects of nanostructured devices. The work presented in this thesis prima
APA, Harvard, Vancouver, ISO, and other styles
24

Liu, Xiaotao. "CHARACTERIZATION OF NANOSTRUCTURE, MATERIALS, AND ELECTRON EMISSION PERFORMANCE OF NEXT-GENERATION THERMIONIC SCANDATE CATHODES." UKnowledge, 2019. https://uknowledge.uky.edu/cme_etds/96.

Full text
Abstract:
Scandate cathodes, where scandia is added to the tungsten cathode pellets, have recently received substantial and renewed research interest owing to significantly improved electron emission capabilities at lower temperatures, as compared with conventional dispenser cathodes. However, there are several persistent issues including non-uniform electron emission, lack of understanding regarding scandium’s role in the emission mechanism, and unreliable reproducibility in terms of scandate cathode fabrication. As a result, scandate cathodes have not yet been widely implemented in actual vacuum elect
APA, Harvard, Vancouver, ISO, and other styles
25

Benke, Steven M. "Operational testing and thermal modeling of a TOPAZ-II single cell thermionic fuel element test stand." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA293595.

Full text
Abstract:
Thesis (M.S. in Astronautical Engineering) Naval Postgraduate School, December 1994.<br>Thesis advisor(s): Oscar Biblarz, Ashok Gopinath. "December 1994." Bibliography: p. 95-96. Also available online.
APA, Harvard, Vancouver, ISO, and other styles
26

Venable, J. Richard. "Electrical characteristics and thermal analysis of a TOPAZ-II single-cell thermionic fuel element test stand." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA298796.

Full text
APA, Harvard, Vancouver, ISO, and other styles
27

Othman, Muhammad Zamir. "Studies of n-type doping and surface modification of CVD diamond for use in thermionic applications." Thesis, University of Bristol, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658070.

Full text
Abstract:
This thesis presents the investigation of potential shallow n-type donors that are candidates to be used as therm ionic emitters for converting solar energy to electrical energy. Due to the various problems associated with current n-type dopants in diamond, the work has examined the use of Li-N codoping as a possible alternative doping strategy in chemical vapour deposition (CVD) of polycrystalline diamond films. Lithium nitride (Li3N) suspension in 1 % w Iv polyoxy in chloroform and N2 or NH3 gas were used as Li and N precursors, respectively, in preparing Li-N co-doped diamond films using a
APA, Harvard, Vancouver, ISO, and other styles
28

VUMMIDI, MURALI KRISHNA PRASAD. "Thermionic Emission Diffusion Model of InP-based Pnp Heterojunction Bipolar Transistor with Non-Uniform Base Doping." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1060110500.

Full text
APA, Harvard, Vancouver, ISO, and other styles
29

Bakr, Arby Mahmoud Abdel Aziem. "Studies on the Reduction of Back Bombardment Effect in Thermionic RF Guns Using Different Cathode Materials." Kyoto University, 2011. http://hdl.handle.net/2433/151905.

Full text
APA, Harvard, Vancouver, ISO, and other styles
30

Jimenez, Justin C. "A systematic cathode study activation of a thermionic cathode, and measuring cesium evaporation from a dispenser photocathode." Thesis, Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Jun/10Jun%5FJimenez.pdf.

Full text
Abstract:
Thesis (M.S. in Applied Physics)--Naval Postgraduate School, June 2010.<br>Thesis Advisor(s): Lewellen, John W. ; Harris, John R. "June 2010." Description based on title screen as viewed on July 14, 2010. Author(s) subject terms: Free Electron Laser, Thermionic, Dispenser, Cathode, Outgassing, Cessium evaporation. Includes bibliographical references (p. 119-124). Also available in print.
APA, Harvard, Vancouver, ISO, and other styles
31

Han, Gina S. B. Massachusetts Institute of Technology. "Analysis of slurry composition for the direct ink writing of mayenite electride for use in thermionic cathodes." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/128417.

Full text
Abstract:
Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, May, 2019<br>Cataloged from PDF of thesis. "The Table of Contents does not accurately represent the page numbering"--Disclaimer page.<br>Includes bibliographical references (page 25).<br>Thermionic cathodes, for use in electric propulsion thrusters, often utilize materials of low work function to decrease operating temperature and thus decrease power consumption. The ability to form these materials into complicated geometries allows for design of more efficient thermionic cathodes, such as multi-channel
APA, Harvard, Vancouver, ISO, and other styles
32

Zen, Heishun. "Generation of high quality electron beam using a thermionic RF gun for mid-infrared free electron lasers." Kyoto University, 2009. http://hdl.handle.net/2433/126405.

Full text
Abstract:
Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(エネルギー科学)<br>甲第14846号<br>エネ博第200号<br>新制||エネ||45(附属図書館)<br>27252<br>UT51-2009-F488<br>京都大学大学院エネルギー科学研究科エネルギー変換科学専攻<br>(主査)准教授 増田 開, 教授 長﨑 百伸, 教授 大垣 英明<br>学位規則第4条第1項該当
APA, Harvard, Vancouver, ISO, and other styles
33

Colakoglu, Tahir. "The Growth And Characterization Of Galium Selenide Thin Films." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/4/1085240/index.pdf.

Full text
Abstract:
GaSe thin films were deposited by thermal evaporation technique with and without Cd doping. X-ray analysis showed that the crystallinity increases in (1014) preferred orientation direction with annealing for doped and undoped films. The room temperature conductivity and mobility values of the samples were found to be for doped and undoped films in between 1.3&times<br>101 - 3.4&times<br>102 (&amp<br>#8486<br>-cm)-1, 1.2&times<br>10-6 - 1.5&times<br>10-6 (&amp<br>#8486<br>-cm)-1 and 5.9 &amp<br>#8211<br>20.9 (cm2/V.s) (for doped samples only), respectively. Due to the high resistivity of the un
APA, Harvard, Vancouver, ISO, and other styles
34

Little, Scott A. "Experimental and numerical studies of a new thermionic emitter structure based on oxide coated carbon nanotubes operating at large emission currents." Virtual Press, 2007. http://liblink.bsu.edu/uhtbin/catkey/1380104.

Full text
Abstract:
We have developed a thermionic cathode capable of high emission currents. The structure of this cathode is oxide coated carbon nanotubes (CNTs) on a tungsten (W) substrate. This cathode was superior in emission due to the combination of the field enhancement effect from the CNTs and the lowered work function from the semiconducting oxide surface. Such oxide coated CNTs were excellent electron emitters. Conventional electron emission theories, such as Richardson's and Fowler-Nordheim's, did not accurately describe the field enhanced thermionic emission from such emitters. A unified electron emi
APA, Harvard, Vancouver, ISO, and other styles
35

Wan, Congshang. "Study of Scandate Cathode Surface Materials." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1428022033.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Jánský, Pavel. "Coulombovské interakce v elektronových svazcích." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-233908.

Full text
Abstract:
The thesis deals with numerical simulations of a hairpin thermionic electron gun, an electron source of the electron-beam welding machine. Simulations showed that the space charge in the electron gun has a significant influence on the beam current and electron trajectories. Simulation outputs are in a sufficient agreement with the experimental measurements.
APA, Harvard, Vancouver, ISO, and other styles
37

Magnus, Sandra Hall. "An Investigation of the relationship between the thermochemistry and emission behavior of thermionic cathodes based on the BaO-Sc₂O₃-WO₃ ternary system." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/19625.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Phumisithikul, Karen L. "Surface photovoltage transients for p-type AlGaN." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3787.

Full text
Abstract:
There is an understanding of surface photovoltage (SPV) behavior for GaN, yet little is known about the SPV behavior for AlGaN. In this work, a Kelvin probe was used to measure the SPV for p-type AlGaN. Very slow SPV transients were found in AlGaN, which could not be explained with a simple thermionic model. A possible explanation of this behavior is the segregation of impurities to the surface, which causes significant reduction of the depletion region width (down to 2 nm), with carrier tunneling and hopping becoming the dominant mechanisms responsible for the SPV transients. To verify th
APA, Harvard, Vancouver, ISO, and other styles
39

Higashi, Cristiane. ""Investigação do processo de obtenção de aluminatos de bário e cálcio para construção e caracterização de catodos termiônicos impregnados para aplicação em dispositivos de microondas de potência"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-31052007-150633/.

Full text
Abstract:
O presente trabalho descreve os processos de preparação do aluminato de bário e cálcio, material emissor de elétrons, empregados nos catodos do tipo impregnado para utilização em uma válvula de microondas do tipo TWT. Os catodos investigados constituem-se de uma pastilha de tungstênio porosa impregnada com aluminato de bário e cálcio com proporção molar 5:3:2. Para a síntese do aluminato, utilizaram-se três diferentes métodos: reação em estado sólido, precipitação e cristalização. A termogravimetria auxiliou na consolidação dos procedimentos de preparação dos aluminatos de modo a definir os pa
APA, Harvard, Vancouver, ISO, and other styles
40

Kummari, Rani S. "Improved SiC Schottky Barrier Diodes Using Refractory Metal Borides." Connect to resource online, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1266422079.

Full text
APA, Harvard, Vancouver, ISO, and other styles
41

Glajc, Petr. "Testování a optimalizace iontového zdroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231360.

Full text
Abstract:
A thorough description of the testing of a saddle-field ion source is presented in the diploma thesis. The most important experimental results, such as Faraday cup measurements of the ion beam current profile and of the ion energy spectra, are included. Based on these results it is shown that the optimized ion source works correctly and according to the expectations. At the end of the thesis, the development of the ion-optical and construction design of the focusing optics is described. The manufactured optics assembly attached to the ion source is also shown.
APA, Harvard, Vancouver, ISO, and other styles
42

Stefanelo, Josiani Cristina. "Estudo das propriedades elétro-óptica de dispositivos eletroluminescentes confeccionados com um compósito híbrido /." Rio Claro : [s.n.], 2009. http://hdl.handle.net/11449/91900.

Full text
Abstract:
Orientador: Dante Luis Chinaglia<br>Banca: Clarissa de Almeida Olivati<br>Banca: Luiz Francisco Malmonge<br>Resumo: Neste trabalho foi desenvolvido um dispositivo eletroluminescente (EL) constituído de um compósito híbrido (CH), formado por uma blenda polimérica e um material EL inorgânico. A blenda é composta por um polímero condutor, a poli(o-metoxianilina) (POMA) dopada com ácido tolueno sulfônico (TSA), e um polímero isolante, o poli(fluoreto de vinilideno-co-trifluoretileno) (P(VDF-TrFE)). A esta blenda é acrescentado um material EL inorgânico, o silicato de zinco dopado com Manganês (Zn2
APA, Harvard, Vancouver, ISO, and other styles
43

Mroz, Michael V. "Characterization of Morphological and Chemical Properties of Scandium Containing Cathode Materials." Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou158470102410177.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Fang, Jieping. "New Methods to Create Multielectron Bubbles in Liquid Helium." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10673.

Full text
Abstract:
An equilibrium multielectron bubble (MEB) in liquid helium is a fascinating object with a spherical two-dimensional electron gas on its surface. After it was first observed a few decades ago, a plethora of physical properties of MEBs, for example, a tunable surface electron density, have been predicted. In this thesis, we will discuss two new methods to create MEBs in liquid helium. Before the discussion, the way to generate a large number of electrons in a low temperature system will be discussed, including thermionic emission and field emission in helium. In the first new method to make MEB
APA, Harvard, Vancouver, ISO, and other styles
45

HIGASHI, CRISTIANE. "Investigação do processo de obtenção de aluminatos de bário e cálcio para construção e caracterização de catodos termiônicos impregnados para a aplicação em dispositivos de microondas de potência." reponame:Repositório Institucional do IPEN, 2006. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11463.

Full text
Abstract:
Made available in DSpace on 2014-10-09T12:52:11Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:57:49Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
APA, Harvard, Vancouver, ISO, and other styles
46

Renouf, Benjamin. "Matériaux et procédés pour la modulation spatiale de l’émissivité électronique d’une cathode thermoïonique." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1224.

Full text
Abstract:
L’objectif de cette thèse est l’étude et la démonstration de la faisabilité d’un procédé de fabrication fiable et reproductible permettant la création d’un dispositif de modulation spatiale de l’émissivité électronique à la surface d’une cathode thermoïonique. Ce procédé doit permettre le maintien de la géométrie de la carte d’émissivité tout au long de la durée de vie opérationnelle de la cathode. Le premier sujet d’étude a donc été de mettre au point un procédé de dépôt localisé de deux types de couches minces : un matériau à faible travail de sortie pour les zones émissives et un matériau à
APA, Harvard, Vancouver, ISO, and other styles
47

Ho, Kang Jin. "Studies on Amorphous Silicon Thin Films Doped with Aluminium." Thesis, Indian Institute of Science, 1995. https://etd.iisc.ac.in/handle/2005/157.

Full text
Abstract:
Amorphous Silicon(a-Si) films have attracted the attention of several investigators as it is an economical material for devices. One of the problems that is addressed is the doping of these films after they are prepared. In this thesis, we investigated the effects of doping amorphous Sil­icon films(prepared by r.f. sputtering) with Aluminium(Al) by ther­mal diffusion. Amorphous Silicon films have been prepared on glass substrates at optimal process parameters. Then, the a-Si films are coated with Al by vacuum evaporation and subjected to heating in N2 atmosphere in the temperature range 300°C
APA, Harvard, Vancouver, ISO, and other styles
48

Ho, Kang Jin. "Studies on Amorphous Silicon Thin Films Doped with Aluminium." Thesis, Indian Institute of Science, 1995. http://hdl.handle.net/2005/157.

Full text
Abstract:
Amorphous Silicon(a-Si) films have attracted the attention of several investigators as it is an economical material for devices. One of the problems that is addressed is the doping of these films after they are prepared. In this thesis, we investigated the effects of doping amorphous Sil­icon films(prepared by r.f. sputtering) with Aluminium(Al) by ther­mal diffusion. Amorphous Silicon films have been prepared on glass substrates at optimal process parameters. Then, the a-Si films are coated with Al by vacuum evaporation and subjected to heating in N2 atmosphere in the temperature range 300°C
APA, Harvard, Vancouver, ISO, and other styles
49

Stefanelo, Josiani Cristina [UNESP]. "Estudo das propriedades elétro-óptica de dispositivos eletroluminescentes confeccionados com um compósito híbrido." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/91900.

Full text
Abstract:
Made available in DSpace on 2014-06-11T19:25:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-10-05Bitstream added on 2014-06-13T18:53:36Z : No. of bitstreams: 1 stefanelo_jc_me_rcla.pdf: 1971755 bytes, checksum: f2545c6a190dc7a872bf14f2c2b4fce6 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Neste trabalho foi desenvolvido um dispositivo eletroluminescente (EL) constituído de um compósito híbrido (CH), formado por uma blenda polimérica e um material EL inorgânico. A blenda é composta por um polímero condutor, a poli(o-metoxianilina) (POMA) dopada com
APA, Harvard, Vancouver, ISO, and other styles
50

Vašíček, Martin. "Charakterizace autoemisních zdrojů pro elektronovou mikroskopii." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220188.

Full text
Abstract:
This work deals with the theoretical foundations of electron emission into vacuum, various types of emissions, focused on the cold-emission and Schottky emission and the principle of quantum tunneling. The next part deals with the technical implementation of electron sources with a detailed study of the methodology of laboratory production of cathodes by electrochemical etching and construction of electron microscopes, using field-emission sources. This work also contains methods for measuring, processing and evaluation of electrical characteristics of emission sources.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Thermionics' for other source types:
Journal articles Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography