Littérature scientifique sur le sujet « Magnetized discharges »
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Articles de revues sur le sujet "Magnetized discharges"
Chen, Francis F. « Nonlinear diffusion in magnetized discharges ». Plasma Sources Science and Technology 7, no 4 (1 novembre 1998) : 458–61. http://dx.doi.org/10.1088/0963-0252/7/4/003.
Texte intégralChen, Francis F., et Davide Curreli. « Central peaking of magnetized gas discharges ». Physics of Plasmas 20, no 5 (mai 2013) : 057102. http://dx.doi.org/10.1063/1.4801740.
Texte intégralCarter, Mark D., Dan Hoffman, Steve Shannon, Philip M. Ryan et D. Buchberger. « Global Modeling of Magnetized Capacitive Discharges ». IEEE Transactions on Plasma Science 35, no 5 (octobre 2007) : 1413–19. http://dx.doi.org/10.1109/tps.2007.906124.
Texte intégralKim, June Young, Jinyoung Choi, Y. S. Hwang et Kyoung-Jae Chung. « Electric potential in partially magnetized E × B discharges ». AIP Advances 11, no 8 (1 août 2021) : 085113. http://dx.doi.org/10.1063/5.0061693.
Texte intégralLabun, A. H., C. E. Capjack et H. J. J. Seguin. « Electron dynamics in magnetized CO2laser and He discharges ». Journal of Applied Physics 68, no 8 (15 octobre 1990) : 3935–46. http://dx.doi.org/10.1063/1.346279.
Texte intégralWinterberg, F. « Laser Compression and Ignition of Z-Pinch Magnetized Dense Fusion Targets ». Zeitschrift für Naturforschung A 55, no 11-12 (1 décembre 2000) : 909–11. http://dx.doi.org/10.1515/zna-2000-11-1213.
Texte intégralHouriez, Luc S., Hossein Mehrpour Bernety, Jesse A. Rodríguez, Benjamin Wang et Mark A. Cappelli. « Experimental study of electromagnetic wave scattering from a gyrotropic gaseous plasma column ». Applied Physics Letters 120, no 22 (30 mai 2022) : 223101. http://dx.doi.org/10.1063/5.0095038.
Texte intégralCarter, M. D., P. M. Ryan, D. Hoffman, W. S. Lee, D. Buchberger et V. Godyak. « Combined rf and transport effects in magnetized capacitive discharges ». Journal of Applied Physics 100, no 7 (octobre 2006) : 073305. http://dx.doi.org/10.1063/1.2355436.
Texte intégralTrieschmann, Jan, Mohammed Shihab, Daniel Szeremley, Abd Elfattah Elgendy, Sara Gallian, Denis Eremin, Ralf Peter Brinkmann et Thomas Mussenbrock. « Ion energy distribution functions behind the sheaths of magnetized and non-magnetized radio frequency discharges ». Journal of Physics D : Applied Physics 46, no 8 (1 février 2013) : 084016. http://dx.doi.org/10.1088/0022-3727/46/8/084016.
Texte intégralLampe, M., G. Joyce, W. M. Manheimer et S. P. Slinker. « Quasi-neutral particle simulation of magnetized plasma discharges : general formalism and application to ECR discharges ». IEEE Transactions on Plasma Science 26, no 6 (1998) : 1592–609. http://dx.doi.org/10.1109/27.747877.
Texte intégralThèses sur le sujet "Magnetized discharges"
Dubois, Thibault. « Electron dynamics in crossed-field discharges ». Electronic Thesis or Diss., Orléans, 2023. http://www.theses.fr/2023ORLE1069.
Texte intégralCrossed-field plasma discharges have a wide variety of applications, including space propulsion (e.g. Hall thrusters) and materials processing (planar magnetrons). The crossed magnetic and electric field configuration creates features such as plasma turbulence and anisotropies in particle properties, the understanding of which require detailed information on electrons. Direct experimental study of these features would contribute to the development of high-fidelity numerical simulations of such plasmas, and to an improved understanding of their operation. An intense research effort has been devoted in recent years to the study of phenomena such as so-called "anomalous" electron transport across the field lines, which exceeds by several orders of magnitude that expected from collisions. The lack of complete understanding of this phenomenon limits the predictive capability of numerical codes for thrusters and other devices. Recent work has, however, established a link between this transport and high-frequency instabilities within the plasma. The complexity of this behavior (3D propagation, coupling effects) requires not only the development of high-performance, full-dimensional numerical codes, but also advanced diagnostics for electron behavior and properties.The nature of these discharges (such as high degrees of electron magnetization and energy, architecture) render invasive diagnostics such as Langmuir probes limited in their capacity to probe electron features. In this work, two diagnostics based on Thomson scattering were applied to the study of such features: THETIS (incoherent Thomson scattering), for measurement of individual electron properties such as temperature (more broadly, electron energy distribution functions), density and drift velocity, while PRAXIS (coherent Thomson scattering), for measurement of small-scale electron density fluctuations (associated with MHz-frequency waves). In a 1.5 kW Hall-effect thruster, the evolution of electron properties along the radial direction was directly measured. A radial variation in the electron properties, most marked for electron temperature, was observed. A linear kinetic theory model was used to evaluate the form of the dispersion relation corresponding to the measured plasma conditions, and this was compared with previous measurements made using PRAXIS. This analysis revealed a smoothing effect of the dispersion relation which could be accounted for due to the variation of electron properties along the characteristic measurement volume dimensions. In a HiPIMS planar magnetron, several discharge conditions were studied, with argon and helium, for peak currents ranging from 40 A to 600 A. Time-resolved features such as anisotropy of the drift velocity were measured, and an analysis of the contributions to the particle drifts was performed under varying conditions. The linear kinetic theory was adapted to the magnetron. The application of PRAXIS to measurements in the planar magnetron revealed the presence of two instabilities in the HiPIMS mode, one identified as the electron cyclotron drift instability (ECDI), studied in previous work, and the second mode propagating at an angle of 45° to the target surface. A preliminary analysis of the perturbative influence of a simple Langmuir probe in the plasma was also carried out on the planar magnetron, and it was observed that a systematic increase in the instability group velocity was occurred in the presence of such a probe.The application of advanced electron diagnostics to measurements in this work have enabled an improved characterization (including with high temporal resolution) of the electron properties and dynamics of these crossed-field devices
Dagtekin, Ebru. « Measurement Of Nonuniform Magnetized Argon Plasma Discharge Parameters ». Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607934/index.pdf.
Texte intégrals a magnetic field of sufficient strength Schottky&rsquo
s theory of ambipolar diffusion applies.
Bailly-Grandvaux, Mathieu. « Laser-driven strong magnetic fields and high discharge currents : measurements and applications to charged particle transport ». Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0557/document.
Texte intégralThe problem of strong quasi-static magnetic field generation is a challenge in laser-plasma interaction physics. Proposed 30 years ago, the use of the laser-driven capacitor-coil scheme, which stands out for its compact design while not needing any additional pulsed power source besides the laser power, only recently demonstrated its potential.This thesis work aims at characterizing the underlying physics and at developing this scheme. We demonstrated the generation of strong quasi-static magnetic fields by laser (500 J, 1 ns-duration and ~10^17 W/cm^2 intensity) of several hundreds of Teslas and duration of 2-3 ns. The B-field space- and time-evolutions were characterized using three independent diagnostics: B-dot probes, Faraday rotation and proton-deflectometry). The characterization of the underlying physical processes involved also X-ray diagnostics of the laser-irradiated zone and optical shadowgraphy of the coil rod expansion.A novel application of externally applied magnetic fields to guide relativistic electron beam in dense matter has been carried out and the obtained results set the ground for improved high-energy-density transport in matter. Indeed, allowing sufficient time for the dense target magnetization, a factor 5 improvement of the electron energy-density flux at 50µm-depth was evidenced.Besides, the generation of high discharge currents consecutive to short laser pulse irradiation (50 J, <1 ps-duration and ~10^19 W/cm^2 intensity) was also pointed out. Proton imaging of the discharge permitted to measure the propagation of an electromagnetic wave at a velocity close to the speed of light. This wave, of ~40ps-duration, was used as an electromagnetic lens to focalize and energy-select a narrow energy range within a multi-MeV proton beam (up to 12 MeV) passing through the coil.All-above experimental measurements and application results were thoroughly compared to both computer simulations and analytic modeling.The applications of this thesis work in a near future will concern:- inertial confinement fusion, by guiding relativistic electron beams up to the dense core nuclear fuel, and by confining particles depositing their energy in it, or even those resulting from the fusion reactions;- laboratory planetology and astrophysics, by generating secondary sources of energetic particles and radiation to reach the warm-dense-matter state or by magnetizing plasmas to reproduce astrophysical phenomena in scaled experiments;- and finally, the control of charged particle beams in vacuum, useful in particular for the development of laser-driven sources for distant applications in science, industry or even medecine
Jiang, Yuchao. « Quelques problèmes de physique et simulation particulaire de plasmas froids partiellement magnétisés et de sources d'ions ». Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30057.
Texte intégralIn this thesis we will illustrate some of the issues in the physics and modeling of partially magnetized plasmas with three specific examples that correspond to ongoing studies in the GREPHE group of the LAPLACE laboratory: 1) Electron extraction in negative ion sources for neutral beam injection in fusion 2) Instabilities in magnetron discharges and Hall thrusters 3) Plasma confinement by magnetic cusps - In the study of negative ion sources for fusion, the aim of the GREPHE group is to better understand the physics of the negative ion source, and more specifically, the questions of plasma transport across the magnetic filter and of negative ion extraction from the plasma. One of the important issues in these negative ion sources is to minimize the current of electrons that are co-extracted with the negative ions. In this thesis we focus on this aspect and we try to understand and quantify how electrons can be extracted through a grid aperture when a magnetic cusp is placed in front of the aperture. We discuss, with the help of 3D PIC MCC (Particle-In-Cell Monte Carlo Collisions) simulations, the contributions of different electron drifts (ExB drift, Grad B drift and curvature drift) and instabilities to electron extraction through a grid aperture.- Hall thrusters and magnetron discharges are ExB cylindrical devices with radial magnetic field and axial electric field. It has been known for a long time that instabilities are present in these discharges, leading to important anomalous electron transport. In this thesis we focus on one particular type of instability, called "rotating Spoke", which is known to be present in Hall thrusters and magnetron discharges and is apparent in the experiments as a luminous non-uniformity rotating in the azimuthal direction. In this work we use a 2D PIC MCC simulation to perform a parametric study of this instability. We show that, in some conditions where rotating spokes have been observed in the experiments, Grad B electron drift plays a major role in electron heating and in the formation and maintenance of the rotating spokes.- Magnetic cusps have been used for more than 60 years to confine the plasma in a large variety of conditions. An important parameter characterizing plasma confinement by cusps is the effective loss area in the presence of magnetic cusps. Some semi-empirical theories have been proposed to quantify the effective loss area and their predictions have been compared with numerous experimental results. In spite of these efforts there is no fully reliable expression of the effective wall loss as a function of different parameters such as magnetic field, electron temperature, ion mass, gas pressure, etc... We describe in this thesis an attempt at obtaining scaling laws for the effective loss width of magnetic cusps, based on 2D PIC MCC simulations
Caneses, Marin Juan Francisco. « Helicon wave propagation and plasma equilibrium in high-density hydrogen plasma in converging magnetic fields ». Phd thesis, 2015. http://hdl.handle.net/1885/105038.
Texte intégralChapitres de livres sur le sujet "Magnetized discharges"
Margot, J., M. Chaker, M. Moisan, L. St-Onge, F. Bounasri, A. Dallaire et E. Gat. « Magnetized Surface-Wave Discharges for Submicrometer Pattern Transfer ». Dans Plasma Processing of Semiconductors, 491–513. Dordrecht : Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5884-8_24.
Texte intégralBinwal, S., J. K. Joshi, S. K. Karkari et L. Nair. « Electrical Discharge Characteristics of Magnetized Capacitive Coupled Plasma ». Dans Springer Proceedings in Physics, 603–9. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-97604-4_94.
Texte intégralKuo, S. C., et E. E. Kunhardt. « Monte-Carlo Simulation of Electron Properties in a Magnetized Microwave Discharge ». Dans Applications of Diamond Films and Related Materials - Proceedings of the First International Conference on the Applications of Diamond Films and Related Materials – ADC '91 Auburn, Alabama, U.S.A., August 17–22, 1991, 615–19. Elsevier, 1991. http://dx.doi.org/10.1016/b978-0-444-89162-4.50100-7.
Texte intégralAstuti, Widi, Triastuti Sulistyaningsih, Dhoni Hartanto, Irene Nindita Pradnya, Khoiriyah Rahmawati et Kusnia Kusnia. « Betung Bamboo-Based Magnetic Biochar for Dye Removal ». Dans Food Sustainability, Environmental Awareness, and Adaptation and Mitigation Strategies for Developing Countries, 137–50. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-5629-3.ch008.
Texte intégralLeys, Clyde, Adam Schwarz, Mark Cloos, Sugeng Widodo, J. Richard Kyle et Julius Sirait. « Chapter 29 : Grasberg Copper-Gold-(Molybdenum) Deposit : Product of Two Overlapping Porphyry Systems ». Dans Geology of the World’s Major Gold Deposits and Provinces, 599–620. Society of Economic Geologists, 2020. http://dx.doi.org/10.5382/sp.23.29.
Texte intégralActes de conférences sur le sujet "Magnetized discharges"
Trieschmann, Jan, Mohammed Shihab, Daniel Szeremley, Abd Elfattah Elgendy, Sara Gallian, Denis Eremin, Ralf Peter Brinkmann et Thomas Mussenbrock. « Ion energy distribution functions in magnetized capacitively coupled RF discharges ». Dans 2013 IEEE 40th International Conference on Plasma Sciences (ICOPS). IEEE, 2013. http://dx.doi.org/10.1109/plasma.2013.6634888.
Texte intégralLand, Victor. « Dust Transport And Force Equilibria In Magnetized Dusty DC Discharges ». Dans NEW VISTAS IN DUSTY PLASMAS : Fourth International Conference on the Physics of Dusty Plasmas. AIP, 2005. http://dx.doi.org/10.1063/1.2134650.
Texte intégralRyan, P. M. « RF Power Coupling And Plasma Transport Effects In Magnetized Capacitive Discharges ». Dans RADIO FREQUENCY POWER IN PLASMAS : 16th Topical Conference on Radio Frequency Power in Plasmas. AIP, 2005. http://dx.doi.org/10.1063/1.2098528.
Texte intégralZolotukhin, Denis, Keir Daniels et Michael Keidar. « The Onset of the Magnetized Pulsed Vacuum Arc : a Promising Way for High Efficiency Propulsion ». Dans 2021 29th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV). IEEE, 2021. http://dx.doi.org/10.1109/isdeiv46977.2021.9587329.
Texte intégralMartin, E. H., S. C. Shannon et J. B. O. Caughman. « Experimental measurements of the dynamic electric field topology associated with magnetized RF sheaths in hydrogen and helium discharges ». Dans 2012 IEEE 39th International Conference on Plasma Sciences (ICOPS). IEEE, 2012. http://dx.doi.org/10.1109/plasma.2012.6384077.
Texte intégralBernety, Hossein Mehrpour, Luc Houriez, Jesse A. Rodriguez, Benjamin Wang et Mark A. Cappelli. « Electromagnetic Scattering from a Magnetized Plasma Discharge Tube ». Dans 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/USNC-URSI). IEEE, 2022. http://dx.doi.org/10.1109/ap-s/usnc-ursi47032.2022.9886630.
Texte intégralCappelli, M., E. Chesta et N. Gascon. « Numerical study of instabilities in a magnetized Hall discharge ». Dans 37th Joint Propulsion Conference and Exhibit. Reston, Virigina : American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-3324.
Texte intégralCramer, N. F. « Space charge modes in the magnetized discharge with dust ». Dans NEW VISTAS IN DUSTY PLASMAS : Fourth International Conference on the Physics of Dusty Plasmas. AIP, 2005. http://dx.doi.org/10.1063/1.2134690.
Texte intégralKawashima, Rei, Zhexu Wang, Amareshwara Sainadh Chamarthi, Hiroyuki Koizumi et Kimiya Komurasaki. « Hyperbolic System Approach for Magnetized Electron Fluids in ExB Discharge Plasmas ». Dans 2018 AIAA Aerospace Sciences Meeting. Reston, Virginia : American Institute of Aeronautics and Astronautics, 2018. http://dx.doi.org/10.2514/6.2018-0175.
Texte intégralKovacic, Jernej, Lino Salamon, Gabrijela Ikovic, Tomaz Gyergyek et Boris Fonda. « Ball-Pen Probe Diagnostics Of A Weakly Magnetized Discharge Plasma Column ». Dans 1st EPS conference on Plasma Diagnostics. Trieste, Italy : Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.240.0052.
Texte intégralRapports d'organisations sur le sujet "Magnetized discharges"
Lampe, Martin, Glenn Joyce, Wallace M. Manheimer et Steven P. Slinker. Quasineutral Particle Simulation of Magnetized Plasma Discharges : General Formalism and Application to ECR Discharges. Fort Belvoir, VA : Defense Technical Information Center, juillet 1997. http://dx.doi.org/10.21236/ada328243.
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