Relevant bibliographies by topics / Virtual cathode

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Virtual cathode'

Author: Grafiati
Published: 25 May 2024
Last updated: 31 July 2025

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Journal articles on the topic "Virtual cathode"

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Roy, Amitava, R. Menon, Vishnu Sharma, Ankur Patel, Archana Sharma, and D. P. Chakravarthy. "Features of 200 kV, 300 ns reflex triode vircator operation for different explosive emission cathodes." Laser and Particle Beams 31, no. 1 (2012): 45–54. http://dx.doi.org/10.1017/s026303461200095x.

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AbstractTo study the effect of explosive field emission cathodes on high power microwave generation, experiments were conducted on a reflex triode virtual cathode oscillator. Experimental results with cathodes made of graphite, stainless steel nails, and carbon fiber (needle type) are presented. The experiments have been performed at the 1 kJ Marx generator (200 kV, 300 ns, and 9 kA). The experimentally obtained electron beam diode perveance has been compared with the one-dimensional Child-Langmuir law. The cathode plasma expansion velocity has been calculated from the perveance data. It was f
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Hayashi, Hideki, Shien-Fong Lin, Boyoung Joung, Hrayr S. Karagueuzian, James N. Weiss, and Peng-Sheng Chen. "Virtual electrodes and the induction of fibrillation in Langendorff-perfused rabbit ventricles: the role of intracellular calcium." American Journal of Physiology-Heart and Circulatory Physiology 295, no. 4 (2008): H1422—H1428. http://dx.doi.org/10.1152/ajpheart.00001.2008.

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A strong premature electrical stimulus (S2) induces both virtual anodes and virtual cathodes. The effects of virtual electrodes on intracellular Ca2+ concentration ([Ca2+]i) transients and ventricular fibrillation thresholds (VFTs) are unclear. We studied 16 isolated, Langendorff-perfused rabbit hearts with simultaneous voltage and [Ca2+]i optical mapping and for vulnerable window determination. After baseline pacing (S1), a monophasic (10 ms anodal or cathodal) or biphasic (5 ms-5 ms) S2 was applied to the left ventricular epicardium. Virtual electrode polarizations and [Ca2+]i varied dependi
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Anfinogentov, Vasilij, and Aleksandr Hramov. "Investigation of oscillations of electron beam with virtual cathode in vircator and virtod." Izvestiya VUZ. Applied Nonlinear Dynamics 7, no. 2-3 (1999): 33–55. http://dx.doi.org/10.18500/0869-6632-1999-7-2-33-55.

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Nonlinear dynamics of the electron beam with virtual cathode in the vacuum drift tube is investigated with the aid of nmumerical simulation. Deterministic nature of the complex virtual cathode oscillations is demonstrated. It is proved, that one of the mechanisms of the chaotic dynamics origin is connected with nonlinear interaction between forming structures in the eleciron beam (virtual cathodes). Inner structures in the beam are analyzed by the orthogonal decomposition by Karunen — Loeve method and the wavelet transform method. Effect of external delay feedback (virtod scheme) processes of
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Anfinogentov, Vasilij. "Chaotic oscillation in the electron beam with virtual cathode." Izvestiya VUZ. Applied Nonlinear Dynamics 2, no. 3 (1994): 69–83. https://doi.org/10.18500/0869-6632-1994-2-5-69-83.

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Nonlinear oscillations of the electron beam with virtual cathode in the Pierce diode are studied by numerical simulation (PIC method). Different dynamical states including chaotic oscillations of the electron beam are recognized. Quantatively (correlation dimension and greatest Lapunov exponent) and qualitatively (autocorrelation function and unstable periodic orbits) characteristics of chaotic oscillations are obtained. Physical processes in the diode are investigated and it was shown that the second region reflecting the electrons may appear in the beam. This region was called the secondary
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Nikolski, Vladimir P., Aleksandre T. Sambelashvili, and Igor R. Efimov. "Mechanisms of make and break excitation revisited: paradoxical break excitation during diastolic stimulation." American Journal of Physiology-Heart and Circulatory Physiology 282, no. 2 (2002): H565—H575. http://dx.doi.org/10.1152/ajpheart.00544.2001.

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10.1152/ajpheart.00544.2001. Onset and termination of electric stimulation may result in “make” and “break” excitation of the heart tissue. Wikswo et al. (30) explained both types of stimulations by virtual electrode polarization. Make excitation propagates from depolarized regions (virtual cathodes). Break excitation propagates from hyperpolarized regions (virtual anodes). However, these studies were limited to strong stimulus intensities. We examined excitation during weak near-threshold diastolic stimulation. We optically mapped electrical activity from a 4 × 4-mm area of epicardium of Lang
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Capeáns, M., W. Dominik, M. Hoch, et al. "The virtual cathode chamber." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 400, no. 1 (1997): 17–23. http://dx.doi.org/10.1016/s0168-9002(97)00947-9.

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Choi, Eun Ha, Kew Yong Sung, Wook Jeon, and Yoon Jung. "Axially Extracted Virtual Cathode Oscillator with Annular Cathode." IEEJ Transactions on Fundamentals and Materials 124, no. 9 (2004): 773–78. http://dx.doi.org/10.1541/ieejfms.124.773.

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Anfinogentov, Vasilij, and Aleksandr Hramov. "Influence of distributed feedback on chaotic virtual cathode oscillation." Izvestiya VUZ. Applied Nonlinear Dynamics 6, no. 1 (1998): 93–107. http://dx.doi.org/10.18500/0869-6632-1998-6-1-93-107.

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Complex dynamics of clectron beam with virtual cathode and distributed feedback is considered with the aid of numerical simulation. Characteristics of virtual cathode complex dynamics is investigated. For the system with connection through electron beam formation of the different types of autostructures is considered. It is proved, that complications of virtual cathode oscillation are connected with an increase of interaction between structures. For е system with connection through clectromagnetic fields (vircator — BWO) structures formation processes are investigated. It is demonstrated, that
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Sze, H., J. Benford, and W. Woo. "High-power microwave emission from a virtual cathode oscillator." Laser and Particle Beams 5, no. 4 (1987): 675–81. http://dx.doi.org/10.1017/s0263034600003189.

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Pinched electron beams emit high power microwaves by formation of a virtual cathode. Radiation occurs simultaneously with pinching or slightly thereafter. Observations of strong electrostatic fields and the partitioning of current into reflexing and transmitting populations at the same time that microwaves are emitted indicate virtual cathode formation. Microwaves originate mainly from the virtual cathode side of the anode. A two-dimensional model for the electron flow in the presence of a virtual cathode is presented. The model allows for electron reflexing and velocity distribution spread. S
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Fiala, Pavel. "Pulse-powered virtual cathode oscillator." IEEE Transactions on Dielectrics and Electrical Insulation 18, no. 4 (2011): 1046–53. http://dx.doi.org/10.1109/tdei.2011.5976094.

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Dissertations / Theses on the topic "Virtual cathode"

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Bakush, Sherif Mohamed. "The operation of LaB6 cathode in the virtual source mode." Thesis, University of York, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.583243.

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This thesis describes the design of a novel electron cathode as utilised in electron microscopes and electron beam lithography columns. The Lanthanum Hexaboride (LaB6) cathode is a high brightness thermionic electron cathode with lower operating temperature and increased lifetime compared to those obtained by the conventional thermionic tungsten (W) cathodes. This cathode also has several similarities to the zirconium on tungsten Zr/O/W (100) Schottky field emission cathode (SFE) including similar operating temperature of 1800K and similar work function. One important difference is that the La
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Toh, Wee Kian. "Theoretical and numerical studies of a co-axial virtual cathode oscillator." Thesis, Queen Mary, University of London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411394.

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Möller, Cecilia. "Design and Experiments with High Power Microwave Sources : The Virtual Cathode Oscillator." Doctoral thesis, KTH, Rymd- och plasmafysik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104794.

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High-Power Microwaves (HPM) can be used to intentionally disturb or destroy electronic equipment at a distance by inducing high voltages and currents.This thesis presents results from simulations and experiments with a narrow band HPM source, the vircator. The high voltages needed to generate HPM puts the vircator under great stress, especially the electrode materials. Several electrode materials have been tested for endurance and their influence on the characteristics of the microwave pulse. With the proper materials the shot-to-shot variations are small and the geometry can be optimized in t
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Bowden-Reid, Richard. "An Experimental Study of Gridded and Virtual Cathode Inertial Electrostatic Confinement Fusion Systems." Thesis, The University of Sydney, 2019. http://hdl.handle.net/2123/21070.

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Inertial electrostatic confinement (IEC) fusion is a technique by which electric fields confine and heat ions. The concept uses concentric electrodes to accelerate and focus ions thereby creating the conditions necessary for nuclear fusion. IEC cathodes may be mechanical, in the form of metallic grids or virtual, formed through trapping a net negative space charge. An experimental study was carried out into the operation of IEC devices of both types. The phenomenon of surface fusion in a gridded IEC was examined and the total fusion rate found to be dominated by atomic interactions on the cath
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Hägg, Martin. "Theoretical analysis and simulation of microwave-generation from a coaxial vircator." Thesis, Uppsala universitet, Fasta tillståndets elektronik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-316595.

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High-power microwave, HPM, systems can be used as non-lethal weapons with the ability to destroy or disturb electronics, by damaging internal circuits and inducing high currents. Today microwave sources are being developed with peak powers exceeding 1 GW, one of these devices is the vircator, a narrowband source which is unique to the HPM community. In order to understand and develop microwave sources like the vircator it is necessary to have computer models, as simulations gives an invaluable understanding of the mechanisms involved during operation, saving time and development costs.        
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Coutinho, Sofia de Sousa. "Étude et analyse des propriétés fondamentales du dititanate de rubidium Rb2Ti2O5 pour des applications de stockage d’énergie." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS087.

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Un système memristif est un composant dont la valeur de la résistance est fonction de tout l’historique électrique, soit des charges ou du flux qui l’a traversé. Cette propriété peut être employée pour le stockage de l’information et dans certaines conditions de l’énergie. Or, le dititanate de rubidium (RTO) présente des propriétés memristives et de stockage intrinsèques. Cette thèse a pour objet l’étude et l’analyse des propriétés fondamentales du RTO pour des applications de stockage d’énergie. L’étude fondamentale a été conduite par l’intermédiaire d’expériences de résonance magnétique nucl
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Yeh, Rann Shyan, and 葉任賢. "Computer Simulation Studies of Virtual Cathode Oscillator." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/23626976125068421784.

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Teng, Hsuan-Hao, and 鄧亘皓. "High Efficiency TE11 Mode Virtual Cathode Oscillator." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/sbrjc4.

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博士<br>國立臺灣大學<br>物理學研究所<br>106<br>Vircator is a pulsed high power microwave source device with the advantages of simple structure, high peak power, low e-beam quality necessary and no external magnetic field, etc. However, short pulse width, frequency drift, output power instability and low beam-wave interaction is the main disadvantage of Vircator. We base on previous study [59] and use the MAGIC (PIC simulation software) for physical properties analysis and optimization of three-dimensional asymmetric coaxial structure to achieve TE11 output mode. In this thesis, we study the competition mech
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Lan, Yung-Chiang, and 藍永強. "Study of vacuum triodes:from field emission microtriodes to virtual cathode oscillators." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/05886146503999566385.

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Books on the topic "Virtual cathode"

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Mien-Win, Wu, and He neng yan jiu suo., eds. Pulsed high-power microwaves from a virtual-cathode reflex triode. Institute of Nuclear Energy Research, 1987.

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Jurgen, Ronald, ed. Electronic Instrument Panel Displays. SAE International, 1998. http://dx.doi.org/10.4271/9780768002270.

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Electronic instrument panel displays systems covers the many technical considerations of instrument panel display systems including brightness, contrast, temperature sensitivity, space requirements, color capabilities and human factors concepts. As part of the Progress in Technology Electronics Series, this book contains 40 technical papers written in the last eleven years on the progress of instrument panel displays and their corresponding electronic systems. Papers are grouped according to display technology and present the most recent advances in that area plus several of historical interes
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Book chapters on the topic "Virtual cathode"

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Litovko, Iryna, Alexey Goncharov, Andrew Dobrovolskyi, and Iryna Naiko. "The Emerging Field Trends Erosion-Free Electric Hall Thrusters Systems." In Plasma Science and Technology [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99096.

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The Hall-type accelerator with closed Hall current and open (that is unbounded by metal or dielectric) walls was proposed and considered both theoretically and experimentally. The novelty of this accelerator is the use of a virtual parallel surface of the anode and the cathode due to the principle of equipotentialization of magnetic field lines, which allows to avoid sputtering of the cathode surface and preserve the dynamics of accelerated ions. The formation of the actual traction beam should be due to the acceleration of ions with the accumulated positive bulk charge. A two-dimensional hybr
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Conference papers on the topic "Virtual cathode"

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Zhang, M., D. Lai, and Q. Xu. "Impedance Control Method of the Cylindrical Virtual Cathode Reflex Triode Based on Multi-ring Cathode." In 2024 IEEE International Conference on Plasma Science (ICOPS). IEEE, 2024. http://dx.doi.org/10.1109/icops58192.2024.10627613.

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Fuks, Mikhail, and Edl Schamiloglu. "Magnetron with virtual cathode." In 2013 IEEE 40th International Conference on Plasma Sciences (ICOPS). IEEE, 2013. http://dx.doi.org/10.1109/plasma.2013.6633277.

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Kim, Se-Hoon, Chang-Jin Lee, Jae-Ho Rhee, Young-Maan Cho, Ji-Eun Baek, and Kwang-Cheol Ko. "Effects of electron beam focusing on virtual cathode formation in virtual cathode oscillator." In 2016 IEEE International Conference on Plasma Science (ICOPS). IEEE, 2016. http://dx.doi.org/10.1109/plasma.2016.7533984.

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Magda, I. I., A. V. Pashchenko, S. S. Romanov, I. N. Shapoval, and V. E. Novikov. "Theory of feedback in generators with virtual cathode. Analytical theory of virtual cathode." In 2004 14th International Crimean Conference "Microwave and Telecommunication Technology". IEEE, 2004. http://dx.doi.org/10.1109/crmico.2004.183356.

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Chen, Yeong-Jer, John Mankowski, John Walter, and Magne Kristiansen. "Virtual Cathode Oscillator Component Optimization." In Conference Record of the 2006 Twenty-Seventh International Power Modulator Symposium. IEEE, 2006. http://dx.doi.org/10.1109/modsym.2006.365206.

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Tsang-Lang Lin, Tsang-Lang Lin, Wen-Ting Chen Wen-Ting Chen, Wen-Jong Liou Wen-Jong Liou, and Yan Hu Yan Hu. "Computer simulation of virtual cathode oscillations." In 1990 Plasma Science IEEE Conference Record - Abstracts. IEEE, 1990. http://dx.doi.org/10.1109/plasma.1990.110662.

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Badarin, Artem A., Semen A. Kurkin, Andrey V. Andreev, Alexey A. Koronovskii, Nikita S. Frolov, and Alexander E. Hramov. "Virtual cathode oscillator with elliptical resonator." In 2017 Eighteenth International Vacuum Electronics Conference (IVEC). IEEE, 2017. http://dx.doi.org/10.1109/ivec.2017.8289607.

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Wang, Honggang, and Yazhou Zhang. "A Virtual Cathode Oscillator with Double Cavities." In 2007 IEEE Pulsed Power Plasma Science Conference. IEEE, 2007. http://dx.doi.org/10.1109/ppps.2007.4345841.

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Jiang, Weihua. "Time-frequency analysis of virtual cathode oscillator." In 2009 IEEE Pulsed Power Conference (PPC). IEEE, 2009. http://dx.doi.org/10.1109/ppc.2009.5386189.

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Stephens, K. F., C. A. Ordonez, and R. E. Peterkin. "Virtual cathode formations in nested-well configurations." In Non-neutral plasma physics III. AIP, 1999. http://dx.doi.org/10.1063/1.1302147.

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Reports on the topic "Virtual cathode"

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Kristiansen, M., and J. Mankowski. Coaxial Virtual Cathode Enhancement. Defense Technical Information Center, 2004. http://dx.doi.org/10.21236/ada427587.

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