Academic literature on the topic 'Résonance lower-Hybrid du plasma'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Résonance lower-Hybrid du plasma.'
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.
Journal articles on the topic "Résonance lower-Hybrid du plasma"
Verdon, Alix L., I. H. Cairns, D. B. Melrose, and P. A. Robinson. "Properties of lower hybrid waves." Proceedings of the International Astronomical Union 4, S257 (September 2008): 569–73. http://dx.doi.org/10.1017/s1743921309029871.
Full textKintner, P. M., J. Vago, S. Chesney, R. L. Arnoldy, K. A. Lynch, C. J. Pollock, and T. E. Moore. "Localized lower hybrid acceleration of ionospheric plasma." Physical Review Letters 68, no. 16 (April 20, 1992): 2448–51. http://dx.doi.org/10.1103/physrevlett.68.2448.
Full textKostrov, A. V., A. V. Strikovskiy, and A. V. Shashurin. "Plasma Turbulence near the Lower Hybrid Resonance." Plasma Physics Reports 27, no. 2 (February 2001): 137–42. http://dx.doi.org/10.1134/1.1348491.
Full textMaity, Chandan, Nikhil Chakrabarti, and Sudip Sengupta. "Nonlinear lower-hybrid oscillations in cold plasma." Physics of Plasmas 17, no. 8 (August 2010): 082306. http://dx.doi.org/10.1063/1.3480644.
Full textRapozo, Cândido da Cunha, Antonio Serbêto, and Lindolff Thadeu Carneiro. "Lower Hybrid Plasma Heating with Anisotropic Temperature." Japanese Journal of Applied Physics 32, Part 1, No. 7 (July 15, 1993): 3282–86. http://dx.doi.org/10.1143/jjap.32.3282.
Full textBINGHAM, R., J. M. DAWSON, and V. D. SHAPIRO. "Particle acceleration by lower-hybrid turbulence." Journal of Plasma Physics 68, no. 3 (April 2002): 161–72. http://dx.doi.org/10.1017/s0022377802001939.
Full textAbdul Rauf, I. Zeba, and Muhammad Saqlain. "Modified Dust-Lower-Hybrid Waves in Quantum Plasma." Scientific Inquiry and Review 2, no. 2 (April 30, 2018): 11–21. http://dx.doi.org/10.32350/22/020202.
Full textRauf, Abdul, I. Zeba, and M. Saqlain. "Modified Dust-Lower-Hybrid Waves In Quantum Plasma." Scientific Inquiry and Review 2, no. 2 (April 2018): 10–19. http://dx.doi.org/10.29145/sir/22/020202.
Full textPraburam, G. "Lower‐hybrid quasimode decay in a plasma cylinder." Physics of Fluids B: Plasma Physics 3, no. 7 (July 1991): 1576–78. http://dx.doi.org/10.1063/1.859676.
Full textWeitzner, Harold. "Lower hybrid waves in the cold plasma model." Communications on Pure and Applied Mathematics 38, no. 6 (November 1985): 919–32. http://dx.doi.org/10.1002/cpa.3160380618.
Full textDissertations / Theses on the topic "Résonance lower-Hybrid du plasma"
Peillon, Etienne. "Simulation and analysis of sign-changing Maxwell’s equations in cold plasma." Electronic Thesis or Diss., Institut polytechnique de Paris, 2024. http://www.theses.fr/2024IPPAE004.
Full textNowadays, plasmas are mainly used for industrial purpose. One of the most frequently cited examples of industrial use is electric energy production via fusion nuclear reactors. Then, in order to contain plasma properly inside the reactor, a background magnetic field is imposed, and the density and temperature of the plasma must be precisely controlled. This is done by sending electromagnetic waves at specific frequencies and directions depending on the characteristics of the plasma.The first part of this PhD thesis consists in the study of the model of plasma in a strong background magnetic field, which corresponds to a hyperbolic metamaterial. The objective is to extend the existing results in 2D to the 3D-case and to derive a radiation condition. We introduce a splitting of the electric and magnetic fields resembling the usual TE and TM decomposition, then, it gives some results on the two resulting problems. The results are in a very partial state, and constitute a rough draft on the subject.The second part consists in the study of the degenerate PDE associated to the lower-hybrid resonant waves in plasma. The associated boundary-value problem is well-posed within a ``natural'' variational framework. However, this framework does not include the singular behavior presented by the physical solutions obtained via the limiting absorption principle. Notice that this singular behavior is important from the physical point of view since it induces the plasma heating mentioned before. One of the key results of this second part is the definition of a notion of weak jump through the interface inside the domain, which allows to characterize the decomposition of the limiting absorption solution into a regular and a singular parts
Norgren, Cecilia. "Lower hybrid drift wave properties in space." Thesis, Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-160438.
Full textTjulin, Anders. "Waves in space plasmas : Lower hybrid cavities and simple-pole distribution functions." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3527.
Full textBaek, Seung Gyou. "Detection of lower hybrid waves at the plasma edge of a diverted tokamak." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/87487.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 195-204).
In this thesis, two experimental investigations are presented in an attempt to understand the loss of lower hybrid current drive (LHCD) efficiency in reactor-relevant, high-density plasmas on the diverted Alcator C-Mod tokamak. While the previous work has identified that edge interactions, such as collisional absorption and excessive up-shift of the parallel refractive index due to full-wave effects, could potentially explain the observed loss of LHCD efficiency in a wide range of line-averaged densities, these simulations still over-predict the fast electron population generated by LHCD above line-averaged densities of 1 x 10²⁰ m- ³. It is critical to identify remaining mechanisms in order to demonstrate advanced tokamak operation at reactor-relevant densities. The first investigation is to perform microwave backscattering experiments to detect electrostatic lower hybrid (LH) waves in the scrape-off layer (SOL), where a significant amount of the injected LH power may be deposited due to a number edge loss mechanisms. An existing ordinary-mode (O-mode) reflectometer system has been modified to measure the backscattered O-mode wave as a result of Bragg backscattering of the incident O-mode wave off the LH wave. The detection of LH waves in a region that is not magnetically connected to the launcher implies a weak single pass absorption of LH waves in high density plasmas. The observed spectral width of the backscattered signals indicates the presence of non-linear effects on the propagation of LH waves, but no experimental evidence is found to confirm whether the non-linear mechanism that is responsible for the observed spectral broadening is responsible for the observed loss of LHCD efficiency. The second investigation is to examine the change in LH frequency spectra due to density-dependent non-linear effects, such as parametric decay instability (PDI) above the line-averaged density of 1 x 10²⁰ m-³, using the probes installed on the launcher, outer divertor, and inner wall. Ion cyclotron PDI is found to be excited above line-averaged densities of 1 x 10²⁰ m -³, suggesting that ion cyclotron PDI may be a remaining mechanism to understand the loss of LHCD efficiency. Ion cyclotron PDI is observed to be excited not only at the low-field-side edge but also at the high-field-side (HFS) edge of Alcator C-Mod, further corroborating that LH waves are weakly absorbed on their first pass. Evidence of pump depletion is found with the onset of ion cyclotron PDI at the HFS edge in lower-single-null plasmas. However, no apparent pump depletion is seen when the magnetic geometry is switched to an upper-single-null. Moreover, ion cyclotron PDI is excited at the LFS edge in this case. Thus, the role of the observed ion cyclotron PDI on the loss of LHCD efficiency needs further experimental investigation to be conclusive due to the different ion cyclotron PDI strength and excitation location, depending on magnetic configurations. A summary of the new findings of this thesis is as follows: First measurements of PDI below the classical threshold (wo/wLH(0) ~~ 2). First ever observation of PDI on HFS of a tokamak and its relationship to being in a multi-pass damping regime. " Advancement of PDI as a candidate mechanism for the LHCD density limit.
by Seung Gyou Baek.
Ph. D.
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.
Full textIncludes bibliographical references (p. 229-235).
by Jeffrey Alan Colborn.
Ph.D.
Helou, Walid. "Design and operation of antennas at the ion cyclotron and lower hybrid range of frequencies for nuclear fusion reactors." Electronic Thesis or Diss., Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0395.
Full textThe thesis provides at first a brief introduction to magnetic nuclear fusion and tokamaks. It explains the need for auxiliary plasma heating and current-drive electromagnetic systems at the Ion Cyclotron and Lower Hybrid Range of Frequencies (ICRF and LHRF). The thesis then sets antenna specifications that allow satisfying proper plasma wave propagation and proper wave-particle resonance. The Radio Frequency (RF) network solver SIDON developed for this thesis is then presented. The thesis then discusses the different types of ICRF antennas and details the challenges of the impedance matching in ICRF arrays of straps. WEST ICRF launchers are discussed in great detail and simulations of impedance matching scenarios for these launchers using SIDON are reported. The thesis reports on the low-power (milliwatt range) testbed that has been developed for WEST ICRF launchers, as well as the low-power tests of the first one among them. Furthermore, high power (megawatt range) experiments on plasma with the JET ICRF ITER-Like Antenna are reported. The thesis then provides an overview about existing LHRF antennas and discusses the numerical modeling of the coupling of waveguide phased arrays to the plasma. The RF design of ASTARTE-LP and its feeding circuit is discussed. ASTARTE-LP is a low-power (milliwatt range) prototype LHRF antenna based on the Slotted Waveguide Antenna concept that has been designed and built to perform proof of principle experiments on the COMPASS tokamak. The experimental validation of ASTARTE-LP and its feeding circuit before the experiments on COMPASS, as well as the experiments performed on COMPASS plasmas are reported
Helou, Walid. "Design and operation of antennas at the ion cyclotron and lower hybrid range of frequencies for nuclear fusion reactors." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0395/document.
Full textThe thesis provides at first a brief introduction to magnetic nuclear fusion and tokamaks. It explains the need for auxiliary plasma heating and current-drive electromagnetic systems at the Ion Cyclotron and Lower Hybrid Range of Frequencies (ICRF and LHRF). The thesis then sets antenna specifications that allow satisfying proper plasma wave propagation and proper wave-particle resonance. The Radio Frequency (RF) network solver SIDON developed for this thesis is then presented. The thesis then discusses the different types of ICRF antennas and details the challenges of the impedance matching in ICRF arrays of straps. WEST ICRF launchers are discussed in great detail and simulations of impedance matching scenarios for these launchers using SIDON are reported. The thesis reports on the low-power (milliwatt range) testbed that has been developed for WEST ICRF launchers, as well as the low-power tests of the first one among them. Furthermore, high power (megawatt range) experiments on plasma with the JET ICRF ITER-Like Antenna are reported. The thesis then provides an overview about existing LHRF antennas and discusses the numerical modeling of the coupling of waveguide phased arrays to the plasma. The RF design of ASTARTE-LP and its feeding circuit is discussed. ASTARTE-LP is a low-power (milliwatt range) prototype LHRF antenna based on the Slotted Waveguide Antenna concept that has been designed and built to perform proof of principle experiments on the COMPASS tokamak. The experimental validation of ASTARTE-LP and its feeding circuit before the experiments on COMPASS, as well as the experiments performed on COMPASS plasmas are reported
Hall, Jan-Ove. "Interaction between Electromagnetic Waves and Localized Plasma Oscillations." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4282.
Full textNicolopoulos-Salle, Anouk. "Formulations variationnelles d'équations de Maxwell résonantes et problèmes aux coins en propagation d'ondes." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS276.
Full textIn 1st part, variational formulations associated with resonant Maxwell equations are constructed. The equations degenerate in the domain, leading to the non-unicity and singularity of the solutions. Adding viscosity desingularizes the equations, and a limiting absorption process, when this viscosity parameter goes to zero, allows to identify the physical solution. The degeneracy separates the problem at the limit into two equations on different domains coupled by their interface, along which the solutions blow up. This work explicitly characterizes the limit solution as a solution of a well-posed formulation, which allows the numerical approximation of the physical solution to the resonant Maxwell equations. The study is motivated by the modeling of hybrid resonances in fusion plasma. A 2nd part concerns numerical domain decomposition methods (DDM). In the presence of corners and cross points, when using an automatic mesher for example, it is necessary to treat these points to obtain absorption (ABC) or transmission (TC) conditions of order higher than 1. We define ABCs of order 2 for the Helmholtz equation on a polygonal domain, with the further intention of deriving TCs treating cross points. Each algorithm presented is endowed with a decreasing energy and is convergent
Wang, Shaojun. "Strong light-molecule coupling : routes to new hybrid materials." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAF038/document.
Full textOver the past 15 years, light-matter strong coupling involving organic materials has been of increasing interest due to the very large energy splitting such systems exhibit between the two hybrid light-matter states, also known as the polaritonic states typically denoted P+ and P-. The large energy splitting, so-called Rabi splitting, is the result of the high transition dipole moments of the molecules and the small mode volumes of micro-metallic Fabry-Pérot (FP) cavities or surface plasmons used in these studies. Rabi-splittings -1 eV have been observed, often representing a significant fraction of the electronic transition energy in which case the system is said to be in the ultra-strong coupling regime. ln this regime the physical chemistry of molecules or the properties of materials of the coupied system should be modified. lndeed, it has already been shown to affect the relaxation pathways in the coupled system, the rates of photochemical reactions, thework-function and conductivity of organic-semiconductors in the dark, among other things. A recent thermodynamic study demonstrated that the ground state energy can also be shifted in theultra-strong coupling regime. Moreover, the strong coupling is not limited to electronic transitions, but also can be used to perturb the ground-state vibrations of molecules in the infrared region. Ali these results suggest that light-molecule strong coupling has much potential for material and molecular science and therefore merits further study
Books on the topic "Résonance lower-Hybrid du plasma"
Rantamäki, Karin. Particle-in-cell simulations of the near-field of a lower hybrid grill. Espoo [Finland]: VTT Technical Research Centre of Finland, 2003.
Find full textBook chapters on the topic "Résonance lower-Hybrid du plasma"
Golant, V. E., and V. I. Fedorov. "Lower Hybrid Heating." In RF Plasma Heating in Toroidal Fusion Devices, 111–33. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-1671-8_4.
Full textPopel, S. I. "Nonlinear Processes in Lower-Hybrid Current Drive and Plasma Heating." In Plasma Physics, 273–76. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-4758-3_20.
Full textRetterer, John M., Tom Chang, and J. R. Jasperse. "Plasma Simulation of Ion Acceleration by Lower Hybrid Waves in the Suprauroral Region." In Geophysical Monograph Series, 282–85. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm038p0282.
Full textTanaka, Motohiko, and K. Papadopoulos. "Creation of High-Energy Electron Tails by the Lower-Hybrid Waves and its Relevance to Type II and III Bursts." In Unstable Current Systems and Plasma Instabilities in Astrophysics, 505–8. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-6520-1_57.
Full textShinohara, I., and M. Fujimoto. "Formation of Thin Electron Current Layer Associated with Lower Hybrid Drift Instability and its Relation to Quick Reconnection Triggering." In Frontiers in Magnetospheric Plasma Physics - Celebrating 10 Years of Geotail Operation, Proceedings of the 16th COSPAR Colloquium held at the Institute of Space and Astronautical Science (ISAS), 123–29. Elsevier, 2005. http://dx.doi.org/10.1016/s0964-2749(05)80019-8.
Full textConference papers on the topic "Résonance lower-Hybrid du plasma"
Söldner, F. X. "Control of plasma profiles with lower hybrid waves." In AIP Conference Proceedings Volume 159. AIP, 1987. http://dx.doi.org/10.1063/1.36665.
Full textFuchs, V., R. A. Cairns, Y. Demers, M. Goniche, P. Jacquet, and J. Mailloux. "Lower hybrid power dissipation by tokamak plasma edge electrons." In The twelfth topical conference on radio frequency power in plasmas. AIP, 1997. http://dx.doi.org/10.1063/1.53405.
Full textSpada, M., and M. Bornatici. "Penetrability of lower hybrid waves in a fusion plasma." In Radio−frequency power in plasmas. AIP, 1989. http://dx.doi.org/10.1063/1.38523.
Full textPeysson, Y., J. Decker, A. Ekedahl, J. Hillairet, T. Ohsako, Cynthia K. Phillips, and James R. Wilson. "Effect of plasma fluctuations on lower hybrid current drive." In RADIO FREQUENCY POWER IN PLASMAS: Proceedings of the 19th Topical Conference. AIP, 2011. http://dx.doi.org/10.1063/1.3665013.
Full textEhsan, Z., and N. Tsintsadze. "Excitation of dust-lower-hybrid wave and cusp solitons." In 2009 IEEE 36th International Conference on Plasma Science (ICOPS). IEEE, 2009. http://dx.doi.org/10.1109/plasma.2009.5227686.
Full textCesario, R., L. Amicucci, G. Calabrò, A. Cardinali, C. Castaldo, M. Marinucci, L. Panaccione, et al. "Lower hybrid current drive at ITER-relevant high plasma densities." In RADIO FREQUENCY POWER IN PLASMAS: Proceedings of the 18th Topical Conference. AIP, 2009. http://dx.doi.org/10.1063/1.3273782.
Full textCesario, R., L. Amicucci, A. Cardinali, C. Castaldo, A. A. Tuccillo, Cynthia K. Phillips, and James R. Wilson. "Lower hybrid current drive at plasma densities required for thermonuclear reactors." In RADIO FREQUENCY POWER IN PLASMAS: Proceedings of the 19th Topical Conference. AIP, 2011. http://dx.doi.org/10.1063/1.3665006.
Full textBell, R. E., S. Bernabei, A. Cavallo, T. K. Chu, T. Luce, M. Ono, R. Motley, J. Stevens, and S. Von Goeler. "Reduced thermal diffusion using lower hybrid waves in a tokamak plasma." In AIP Conference Proceedings Volume 159. AIP, 1987. http://dx.doi.org/10.1063/1.36661.
Full textBlackwell, D. D., W. E. Amatucci, and C. D. Cothran. "Whistler and lower hybrid wave propagation experiments at the NRL SPSC." In 2009 IEEE 36th International Conference on Plasma Science (ICOPS). IEEE, 2009. http://dx.doi.org/10.1109/plasma.2009.5227366.
Full textTakeda, Y. "Particle Acceleration Due to Electric Field Bursts Close to the Lower Hybrid Frequency in a High-Voltage Linear Plasma Discharge." In PLASMA PHYSICS: 11th International Congress on Plasma Physics: ICPP2002. AIP, 2003. http://dx.doi.org/10.1063/1.1593956.
Full textReports on the topic "Résonance lower-Hybrid du plasma"
Guan, Xiaoyin, Hong Qin, Jian Liu, and Nathaniel J. Fisch. On the Toroidal Plasma Rotations Induced by Lower Hybrid Waves. Office of Scientific and Technical Information (OSTI), November 2012. http://dx.doi.org/10.2172/1056357.
Full textWinske, D. Onset Conditions for the Driven Lower Hybrid Drift Instability in an Expanding Magnetized Plasma. Fort Belvoir, VA: Defense Technical Information Center, January 1989. http://dx.doi.org/10.21236/ada205505.
Full text