Relevant bibliographies by topics / Electrons découplés companion plasma

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  1. Journal articles
  2. Dissertations / Theses

Academic literature on the topic 'Electrons découplés companion plasma'

Author: Grafiati
Published: 8 June 2024
Last updated: 31 July 2025

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Journal articles on the topic "Electrons découplés companion plasma"

1

Istomin, Ya N. "On the Nature of Radio Eclipsing." International Astronomical Union Colloquium 177 (2000): 533–34. http://dx.doi.org/10.1017/s025292110006053x.

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AbstractIt is shown that the phenomena of radio eclipsing can be explained by the linear mechanism of transformation of the transverse electromagnetic wave, propagating in the pulsar wind, into the plasma waves in the region of interaction of wind with a companion star atmosphere. The coefficient of the passingηdepends on the wave frequencyωby the exponential mannerη= exp{–const ·ω−1}. The estimated scale for the pulsar wind and star’s atmosphere density gradients are of the order of 100 meters. Such gradient can be obtained in the bow shock forming when the pulsar wind enters into the compani
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Papavasileiou, Theodora, Odysseas Kosmas, and Ioannis Sinatkas. "Studying the Spectral Energy Distributions Emanating from Regular Galactic XRBs." Universe 9, no. 7 (2023): 312. http://dx.doi.org/10.3390/universe9070312.

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X-ray binary systems (XRBs) exhibit similar dynamics and multimessenger emission mechanisms to active galactic nuclei (AGNs) with the benefit of shorter time scaling. Those systems produce rich spectral energy distributions (SEDs) ranging from the radio band to the very high energy gamma rays. The emission origin varies between the system’s accretion disk (X-rays) to the corona and, most notably, to the two twin plasma ejections (jets) that often meet the interstellar medium forming highly observable radio lobes. Modeling of the jets offers an excellent opportunity to understand the intrinsic
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Reux, C., C. Paz-Soldan, N. Eidietis, et al. "Physics of runaway electrons with shattered pellet injection at JET." Plasma Physics and Controlled Fusion 64, no. 3 (2022): 034002. http://dx.doi.org/10.1088/1361-6587/ac48bc.

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Abstract Runaway electrons (REs) created during tokamak disruptions pose a threat to the reliable operation of future larger machines. Experiments using shattered pellet injection (SPI) have been carried out at the JET tokamak to investigate ways to prevent their generation or suppress them if avoidance is not sufficient. Avoidance is possible if the SPI contains a sufficiently low fraction of high-Z material, or if it is fired early in advance of a disruption prone to runaway generation. These results are consistent with previous similar findings obtained with Massive Gas Injection. Suppressi
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Ma, Q., B. Ni, X. Tao, and R. M. Thorne. "Evolution of the plasma sheet electron pitch angle distribution by whistler-mode chorus waves in non-dipole magnetic fields." Annales Geophysicae 30, no. 4 (2012): 751–60. http://dx.doi.org/10.5194/angeo-30-751-2012.

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Abstract. We present a detailed numerical study on the effects of a non-dipole magnetic field on the Earth's plasma sheet electron distribution and its implication for diffuse auroral precipitation. Use of the modified bounce-averaged Fokker-Planck equation developed in the companion paper by Ni et al. (2012) for 2-D non-dipole magnetic fields suggests that we can adopt a numerical scheme similar to that used for a dipole field, but should evaluate bounce-averaged diffusion coefficients and bounce period related terms in non-dipole magnetic fields. Focusing on nightside whistler-mode chorus wa
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Bouhram, M., N. Dubouloz, M. Hamelin, et al. "Electrostatic interaction between Interball-2 and the ambient plasma. 1. Determination of the spacecraft potential from current calculations." Annales Geophysicae 20, no. 3 (2002): 365–76. http://dx.doi.org/10.5194/angeo-20-365-2002.

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Abstract. The Interball-2 spacecraft travels at altitudes extending up to 20 000 km, and becomes positively charged due to the low-plasma densities encountered and the photoemission on its sunlit surface. Therefore, a knowledge of the spacecraft potential Fs is required for correcting accurately thermal ion measurements on Interball-2. The determination of Fs is based on the balance of currents between escaping photoelectrons and incoming plasma electrons. A three-dimensional model of the potential structure surrounding Interball-2, including a realistic geometry and neglecting the space-charg
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Papavasileiou, Theodora, Odysseas Kosmas, and Ioannis Sinatkas. "Simulations of Neutrino and Gamma-Ray Production from Relativistic Black-Hole Microquasar Jets." Galaxies 9, no. 3 (2021): 67. http://dx.doi.org/10.3390/galaxies9030067.

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Recently, microquasar jets have aroused the interest of many researchers focusing on the astrophysical plasma outflows and various jet ejections. In this work, we concentrate on the investigation of electromagnetic radiation and particle emissions from the jets of stellar black hole binary systems characterized by the hadronic content in their jets. Such emissions are reliably described within the context of relativistic magneto-hydrodynamics. Our model calculations are based on the Fermi acceleration mechanism through which the primary particles (mainly protons and electrons) of the jet are a
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Sridhar, Navin, and Brian D. Metzger. "Radio Nebulae from Hyperaccreting X-Ray Binaries as Common-envelope Precursors and Persistent Counterparts of Fast Radio Bursts." Astrophysical Journal 937, no. 1 (2022): 5. http://dx.doi.org/10.3847/1538-4357/ac8a4a.

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Abstract Roche lobe overflow from a donor star onto a black hole or neutron star binary companion can evolve to a phase of unstable runaway mass transfer, lasting as short as hundreds of orbits (≲102 yr for a giant donor) and eventually culminating in a common-envelope event. The highly super-Eddington accretion rates achieved during this brief phase ( M ̇ ≳ 10 5 M ̇ Edd ) are accompanied by intense mass loss in disk winds, analogous to but even more extreme than ultraluminous X-ray (ULX) sources in the nearby universe. Also in analogy with the observed ULX, this expanding outflow will inflate
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8

Martin-Solis, Jose Ramon, Jose Angel Mier, Michael Lehnen, and Alberto Loarte. "Formation and termination of runaway beams during vertical displacement events in tokamak disruptions." Nuclear Fusion, April 2, 2022. http://dx.doi.org/10.1088/1741-4326/ac637b.

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Abstract A simple 0-D model which mimics the plasma surrounded by the conducting structures [D.I. Kiramov, B.N. Breizman, Physics of Plasmas 24, 100702 (2017)] and including self-consistently the vertical plasma motion and the generation of runaway electrons during the disruption is used for an assessment of the effect of vertical displacement events on the runaway current formation and termination. The total plasma current and runaway current at the time the plasma hits the wall is estimated and the effect of injecting impurities into the plasma is evaluated. In the case of ITER, with a highl
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Jovel, David R., Janice D. Cabrera, and Mitchell L. R. Walker. "Current pathways model for hall thruster plumes in ground-based vacuum test facilities: measurements and observations." Journal of Electric Propulsion 3, no. 1 (2024). https://doi.org/10.1007/s44205-024-00097-8.

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AbstractA previous companion paper introduced a current pathways model that represents the electrical coupling between the Hall effect thruster (HET) and the ground-based vacuum test facility operational environment. In this work, we operated a 7-kW class HET at 4.5 kW, 15 A and 6 kW, 20 A on krypton to quantify aspects of the current pathways model to characterize the role metal vacuum chambers play in the thruster’s discharge circuit as a function of discharge current. During HET operation, far-field ion and electron saturation currents at 47 near-facility wall locations were measured using
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Taunay, Pierre-Yves, Christopher Wordingham, and Edgar Choueiri. "Physics of Thermionic, Orificed Hollow Cathodes. Part 1: Theory and Experimental Validation." Plasma Sources Science and Technology, March 10, 2022. http://dx.doi.org/10.1088/1361-6595/ac5c63.

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Abstract A model aimed at illuminating the physics of thermionic, orificed hollow cathodes is developed and validated with experimental data. The model is intended to describe the variation of total (neutrals, ions, and electrons) static pressure with controllable parameters. That pressure must be properly evaluated because it influences important plasma parameters in the cathode such as the attachment length and the electron temperature, which directly impact the lifetime of thermionic inserts. The model, which combines a zero-dimensional approach to the conservation of energy and momentum fo
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Dissertations / Theses on the topic "Electrons découplés companion plasma"

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Sridhar, Sundaresan. "Study of tokamak plasma disruptions and runaway electrons in a metallic environment." Electronic Thesis or Diss., Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0313.

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Les dispositifs de fusion de type tokamaks ont atteint des performances proches de celles nécessaires à réacteur industriel de fusion et les disruptions sont des événements majeurs dans lesquels l'énergie du plasma est perdue en un très court instant. Electrons découplés (RE), de par leur énergie (quelques 10ème\,MeV), peuvent endommager des composants internes du tokamak. La stratégie actuelle consiste à éviter la génération de RE à l’aide d’une injection massive de matière (MMI). Si leur génération ne peut pas être évitée, une 2ème MMI sera utilisée pour atténuer le faisceau d’électrons déco
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Sommariva, Cristian. "Test particles dynamics in 3D non-linear magnetohydrodynamics simulations and application to runaway electron formation in tokamak disruptions." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0512/document.

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La thèse étudie la dynamique des Electrons Découplés (DE) dans une disruption plasma déclenchée par injection massive de gaz dans le tokamak JET et simulée par le code JOREK. Cette investigation est permise par l’implémentation d’un module de suivi des particules tests relativistes dans JOREK. L’étude montre que les électrons peuvent ‘survivre’dans le chaos magnétique caractérisant la phase dite de ‘Disjonction Thermique’ (DT) de cette disruption (simulée) grâce à la reformation des surfaces magnétiques fermées. Deuxièmement, l’accélération des électrons causée par les champs électriques dus a
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Sommariva, Cristian. "Test particles dynamics in 3D non-linear magnetohydrodynamics simulations and application to runaway electron formation in tokamak disruptions." Electronic Thesis or Diss., Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0512.

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La thèse étudie la dynamique des Electrons Découplés (DE) dans une disruption plasma déclenchée par injection massive de gaz dans le tokamak JET et simulée par le code JOREK. Cette investigation est permise par l’implémentation d’un module de suivi des particules tests relativistes dans JOREK. L’étude montre que les électrons peuvent ‘survivre’dans le chaos magnétique caractérisant la phase dite de ‘Disjonction Thermique’ (DT) de cette disruption (simulée) grâce à la reformation des surfaces magnétiques fermées. Deuxièmement, l’accélération des électrons causée par les champs électriques dus a
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