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Dissertations / Theses on the topic 'Electron Cyclotron Waves'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

McGregor, Duncan Ekundayo. "Electron cyclotron heating and current drive using the electron Bernstein modes." Thesis, St Andrews, 2007. http://hdl.handle.net/10023/212.

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2

Skoug, Ruth Marie. "The origin of narrow band cyclotron wave emissions called chorus /." Thesis, Connect to this title online; UW restricted, 1995. http://hdl.handle.net/1773/9685.

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3

Hirata, Yosuke. "Shaping of Millimeter Waves and Its Applications to Gyrotrons For Electron Cyclotron Heating of Magnetized Plasmas." Kyoto University, 1998. http://hdl.handle.net/2433/182235.

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4

Colborn, Jeffrey Alan. "Current-drive and plasma-formation experiments on the Versator-II tokamak using lower-hybrid and electron-cyclotron waves." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12852.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.<br>Includes bibliographical references (p. 229-235).<br>by Jeffrey Alan Colborn.<br>Ph.D.

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5

BIN, WILLIAM MAURIZIO. "Evaluations of high density plasma heating through O-X-B double mode conversion of EC-Waves in FTU Tokamak." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/18996.

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The work presented in this PhD Thesis has been performed in the framework of research on Thermonuclear Fusion in magnetically confined plasmas of tokamak-like devices. The effort is aimed at a feasibility study of low-field side Electron Cyclotron Resonance Heating (ECRH) in overdense plasmas. The main aim of this Thesis consists in the study of the applicability of the mode conversion scheme, known as ”O-X-B Double Mode Conversion”, to the Italian tokamak FTU (Frascati Tokamak Upgrade), with the use of millimeter-waves at the 140 GHz frequency. This overdense plasma heating technique, not

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6

Spark, Stephen N. "Pulsed mm-wave electron cyclotron maser experiments." Thesis, University of Strathclyde, 1988. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21311.

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A pulsed Electron Cyclotron Maser (E. C. M.) was developed and used to generate high power mm-waves in the W-band (75-110GHz) and the G-band (150-220GHz) frequency ranges. The relativistic electron beam (R. E. B.) was produced from a field-immersed, field-emission, cold cathode. A shaped anode cavity was designed for the optimum cavity Q, resonant frequencies, relative mode density, reflection coefficients and mode conversion in the output coupler. Two pulsed conventional field coils were used; coil#1 (maximum B-field : 9T) produced the uniform intra-cavity magnetic field and coil#2 (maximum B

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7

Hsu, Thomas C. "The submillimeter wave electron cyclotron emission diagnostic for the Alcator C-Mod tokamak." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/36434.

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8

Obasanjo, Oluwaseun Babafemi. "Characterisation and optimisation of an electron cyclotron wave resonant reactor for etching semiconductor." Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614956.

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9

Mariani, A. "WAVE ENERGY FLUX AND ABSORPTION OF ELECTRON CYCLOTRON GAUSSIAN BEAMS IN TOKAMAK PLASMAS." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/231161.

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In this thesis some theoretical problems related to the propagation and absorption of Electron Cyclotron Gaussian beams in tokamak plasmas of interest for nuclear fusion applications are investigated. To account for diffraction effects, beam propagation is analyzed in the framework of the complex eikonal method, a generalization of geometrical optics in which the phase function is assumed to be complex valued, with the non-negative imaginary part accounting for the finite width of the beam cross section. Within this framework, the solution at the dominant order in the expansion parameter is

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10

Kubota, Yuko. "Study on Variation of Radiation Belt Electron Fluxes Through Nonlinear Wave-Particle Interactions." Kyoto University, 2018. http://hdl.handle.net/2433/232003.

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11

Chang, Ouliang. "Numerical Simulation of Ion-Cyclotron Turbulence Generated by Artificial Plasma Cloud Release." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/34018.

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Possibilities of generating plasma turbulence to provide control of space weather processes have been of particular interest in recent years. Such turbulence can be created by chemical released into a magnetized background plasma. The released plasma clouds are heavy ions which have ring velocity distribution and large free energy to drive the turbulence. An electromagnetic hybrid (fluid electrons and particle ions) model incorporating electron inertia is developed to study the generation and nonlinear evolution of this turbulence. Fourier pseudo-spectral methods are combined with finite diffe

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12

Chergui, Mohammed. "Étude numérique de l'absorption et de l'émission d'ondes à la fréquence cyclotron électronique par un plasma de tokamak soutenu par radio-fréquence." Nancy 1, 1988. http://www.theses.fr/1988NAN10259.

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L'équation de dispersion est résolue en y injectant un modèle particulier de fonction de distribution des quantités de mouvement d'un plasma de tokamak. Les résultats obtenus sont en complet désaccord avec le modèle maxwellien, en particulier pour la disposition de l'énergie dans le cas de l'absorption, la température radiative dans le cas de l'émission et la fréquence d'intéraction onde-particule, qui est inférieure à la fréquence cyclotron électronique, ce qui présente plusieurs avantages techniques et une voie prometteuse pour le chauffage des plasmas de fusion

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13

Krivenski, Vladimir. "Étude cinétique relativiste du chauffage et de la génération de courant cyclotroniques électroniques dans un tokamak." Nancy 1, 1988. http://www.theses.fr/1988NAN10281.

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14

Girard, Alain. "Etude de l'émission cyclotronique électronique d'un plasma de tokamak au cours de l'interaction onde-électrons au voisinage de la fréquence hybride inférieure." Grenoble 1, 1986. http://www.theses.fr/1986GRE10120.

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Theorie lineaire de l'interaction onde-particules. On montre les possibilites de diagnostic d'un moment d'ordre deux : l'emission cyclotronique electronique. On se sert d'un interferometre de michelson qui permet de selectionner a volonte le domaine spectral utile. Le rayonnement cyclotron permet de caracteriser l'action d'une onde de pompage en etudiant la partie du spectre ou le plasma est optiquement mince, on a acces a l'emissivite cyclotronique qui est directement proportionnelle a la puissance absorbee par le plasma. Ceci a permis de lever un grand nombre d'ambiguites toutes liees a un e

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15

Chapman, Brian E. "Electron cyclotron waves in a highly inhomogeneous plasma." 1994. http://catalog.hathitrust.org/api/volumes/oclc/32796548.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1994.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 133-139).

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16

Capannolo, Luisa. "Energetic electron precipitation into the Earth's upper atmosphere driven by electromagnetic ion cyclotron waves." Thesis, 2020. https://hdl.handle.net/2144/40353.

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Energetic electrons undergo significant flux variations in the Earth’s outer radiation belt, where magnetospheric waves play an important role in changing the energetic electron dynamics. In particular, electromagnetic ion cyclotron (EMIC) waves are suggested to drive efficient pitch angle scattering of relativistic electrons, which results in relativistic electron precipitation into the upper atmosphere. Such precipitation provides an important source of energy input into the upper atmosphere, where precipitating electrons can affect atmospheric chemistry and ionization. However, the quantita

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17

Hsieh, Man-Kam Johannes. "Full wave simulation of electron cyclotron and helicon plasma processing systems." 1996. http://catalog.hathitrust.org/api/volumes/oclc/35916084.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1996.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 273-285).

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18

Lee, Kun-Han, and 李昆翰. "Wave generation and electron acceleration associated with cyclotron maser instability driven by an electron ring-beam distribution in space plasmas." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/qnztpr.

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博士<br>國立中央大學<br>太空科學研究所<br>102<br>The cyclotron maser instability (CMI) is an important mechanism for radio emissions from the sun, astrophysical shocks and planets, such as solar radio bursts, auroral kilometric radiation (AKR) and Jovian decametric radiation (DAM). The key ingredients for CMI are (a) the relativistic effect in the resonance condition and (b) a population-inversion distribution providing free energy. The relativistic resonance condition yields an ellipse or hyperbola in the particle momentum space rather than a straight line with constant parallel momentum. A population inver

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