Role of electron physics in the development of turbulent magnetic reconnection in collisionless plasmas
William Daughton,Vadim Roytershteyn,Homa Karimabadi,Lin Yin,Brian J. Albright,B. Bergen,Kevin J. Bowers +6 more
TLDR
In this article, Petaflop-scale simulations of the evolution of turbulent magnetic reconnection in a three-dimensional plasma indicate that it proceeds in a way that is dramatically different from classical theory.Abstract:
Magnetic reconnection is important to the dynamics of many astrophysical and fusion plasmas but our understanding of it is incomplete. Petaflop-scale simulations of the evolution of turbulent magnetic reconnection in a three-dimensional plasma indicate that it proceeds in a way that is dramatically different from classical theory.read more
Citations
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How cholesterol interacts with membrane proteins: an exploration of cholesterol-binding sites including CRAC, CARC, and tilted domains
TL;DR: How cholesterol interacts with membrane lipids and proteins at the molecular/atomic scale is described, with special emphasis on transmembrane domains of proteins containing either the consensus cholesterol-binding motifs CRAC and CARC or a tilted peptide.
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Observation of an evolving magnetic flux rope before and during a solar eruption
TL;DR: The observations suggest that the instability of the magnetic flux rope triggers the eruption, thus making a major addition to the traditional magnetic-reconnection paradigm.
Journal ArticleDOI
Particle Acceleration and Plasma Dynamics during Magnetic Reconnection in the Magnetically Dominated Regime
TL;DR: In this paper, two-dimensional (2D) and three-dimensional kinetic simulations were carried out to investigate relativistic magnetic reconnection and the associated particle acceleration, and it was shown that the acceleration is accelerated by the curvature drift of particles along the electric field induced by the relativist flows.
Journal ArticleDOI
The link between shocks, turbulence, and magnetic reconnection in collisionless plasmas
Homa Karimabadi,Vadim Roytershteyn,H.X. Vu,Yuri Omelchenko,J. D. Scudder,William Daughton,Andrew Dimmock,Katariina Nykyri,Minping Wan,David G. Sibeck,Mahidhar Tatineni,Amit Majumdar,B. Loring,Berk Geveci +13 more
TL;DR: In particular, collisionless shocks with their reflected ions that can get upstream before retransmission can generate previously unforeseen phenomena in the post-shocked flows: (i) formation of reconnecting current sheets and magnetic islands with sizes up to tens of ion inertial length.
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Magnetic reconnection and stochastic plasmoid chains in high-Lundquist-number plasmas
TL;DR: In this paper, a numerical study of magnetic reconnection in the large-Lundquist-number (S), plasmoid-dominated regime is carried out for S up to 107.
References
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Book
Discrete-Time Signal Processing
TL;DR: In this paper, the authors provide a thorough treatment of the fundamental theorems and properties of discrete-time linear systems, filtering, sampling, and discrete time Fourier analysis.
Journal ArticleDOI
Finite‐Resistivity Instabilities of a Sheet Pinch
TL;DR: In this paper, the stability of a plane current layer is analyzed in the hydromagnetic approximation, allowing for finite isotropic resistivity, and the effect of a small layer curvature is simulated by a gravitational field.
Journal ArticleDOI
On a plasma sheath separating regions of oppositely directed magnetic field
TL;DR: In this article, an exact solution of the Vlasov equations was found which describes a layer of plasma confined between two regions of oppositely directed magnetic field, and the electrons and ions have Maxwellian distributions on the plane where the magnetic field vanishes.
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Initial ISEE Magnetometer Results: Magnetopause Observations (Article published in the special issues: Advances in Magnetospheric Physics with GEOS- 1 and ISEE - 1 and 2.)
C. T. Russell,R. C. Elphic +1 more
Abstract: The magnetic field profiles across the magnetopause obtained by the ISEE-1 and -2 spacecraft separated by only a few hundred kilometers are examined for four passes. During one of these passes the magnetosheath field was northward, during one it was slightly southward, and in two it was strongly southward. The velocity of the magnetopause is found to be highly irregular ranging from 4 to over 40 km s-1 and varying in less time than it takes for a spacecraft to cross the boundary. Thicknesses ranged from 500 to over 1000 km.Clear evidence for reconnection is found in the data when the magnetosheath field is southward. However, this evidence is not in the form of classic rotational discontinuity signatures. Rather, it is in the form of flux transfer events, in which reconnection starts and stops in a matter of minutes or less, resulting in the ripping off of flux tubes from the magnetosphere. Evidence for flux transfer events can be found both in the magnetosheath and the outer magnetosphere due to their alteration of the boundary normal. In particular, their presence at the time of magnetopause crossings invalidates the usual 2-dimensional analysis of magnetopause structure. Not only are these flux transfer events probably the dominant means of reconnection on the magnetopause, but they may also serve as an important source of magnetopause oscillations, and hence of pulsations in the outer magnetosphere. On two days the flux transfer rate was estimated to be of the order of 2 × 1012 Maxwells per second by the flux transfer events detected at ISEE. Events not detectable at ISEE and continued reconnection after passage of an FTE past ISEE could have resulted in an even greater reconnection rate at these times.
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Electron acceleration from contracting magnetic islands during reconnection
TL;DR: Here it is shown that electrons gain kinetic energy by reflecting from the ends of the contracting ‘magnetic islands’ that form as reconnection proceeds, analogous to the increase of energy of a ball reflecting between two converging walls.