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Free-standing, interconnected metallic nanowire networks with density as low as 40 mg/cm^{3} have been achieved over cm-scale areas, using electrodeposition into polycarbonate membranes that have been ion-tracked at multiple angles.…

Two dimensional modeling of collisionless shocks has been of tremendous importance in understanding the physics of the non-linear evolution, momentum transfer and particle acceleration, but current computer capacities have now reached a…

高能天体物理现象 · 物理学 2015-05-19 Troels Haugboelle

While observations have suggested that power-law electron energy spectra are a common outcome of strong energy release during magnetic reconnection, e.g., in solar flares, kinetic simulations have not been able to provide definite evidence…

太阳与恒星天体物理 · 物理学 2019-11-06 Xiaocan Li , Fan Guo , Hui Li , Adam Stanier , Patrick Kilian

We present results of 2D3V particle-in-cell simulations of non-relativistic plasma collisions with absent or parallel large-scale magnetic field for parameters applicable to the conditions at young supernova remnants. We study the collision…

高能天体物理现象 · 物理学 2015-06-11 Jacek Niemiec , Martin Pohl , Antoine Bret , Volkmar Wieland

Magnetic reconnection requires the violation of the frozen-in condition which ties gyrating charged particles to the magnetic field inhibiting diffusion. Ongoing reconnection has been identified in near-Earth space as being responsible for…

空间物理 · 物理学 2014-01-24 R. A. Treumann , W. Baumjohann

We perform 3D relativistic ideal MHD simulations to study the collisions between high-$\sigma$ (Poynting-flux-dominated) blobs which contain both poloidal and toroidal magnetic field components. This is meant to mimic the interactions…

高能天体物理现象 · 物理学 2015-06-03 Wei Deng , Hui Li , Bing Zhang , Shengtai Li

Using fully kinetic simulations, we study the x-line orientation of magnetic reconnection in an asymmetric configuration. A spatially localized perturbation is employed to induce a single x-line, that has sufficient freedom to choose its…

空间物理 · 物理学 2015-11-04 Yi-Hsin Liu , Michael Hesse , Masha Kuznetsova

We conduct a multiparametric study of driven magnetic reconnection relevant to recent experiments on colliding magnetized laser produced plasmas using particle-in-cell simulations. Varying the background plasma density, plasma resistivity,…

等离子体物理 · 物理学 2018-06-15 K. V. Lezhnin , W. Fox , J. Matteucci , D. B. Schaeffer , A. Bhattacharjee , M. J. Rosenberg , K. Germaschewski

During magnetic reconnection in collisionless space plasma, the electron fluid decouples from the magnetic field within narrow current layers, and theoretical models for this process can be distinguished in terms of their predicted current…

等离子体物理 · 物理学 2021-06-18 S. Greess , J. Egedal , A. Stanier , W. Daughton , J. Olson , A. Lê , R. Myers , A. Millet-Ayala , M. Clark , J. Wallace , D. Endrizzi , C. Forest

We derive basic scaling equations for relativistic magnetic reconnection in the general case of asymmetric inflow conditions and obtain predictions for the outflow Lorentz factor and the reconnection rate. Kinetic Particle-in-Cell…

等离子体物理 · 物理学 2022-05-16 Rostom Mbarek , Colby Haggerty , Lorenzo Sironi , Michael Shay , Damiano Caprioli

This work presents a more detailed analysis of the process of magnetic reconnection as promising ion beam accelerator mechanism with possible applications in laboratory plasmas and, more importantly, in the plasma propulsion field. In a…

等离子体物理 · 物理学 2018-08-15 Emanuele Cazzola , Davide Curreli , Giovanni Lapenta

The past decade has seen an outstanding development of nonthermal particle acceleration in magnetic reconnection in magnetically-dominated systems, with clear signatures of power-law energy distributions as a common outcome of…

高能天体物理现象 · 物理学 2023-09-11 Xiaocan Li , Fan Guo , Yi-Hsin Liu , Hui Li

Using observations of Earth's bow shock by the Magnetospheric Multiscale mission, we show for the first time that active magnetic reconnection is occurring at current sheets embedded within the quasi-parallel shock's transition layer. We…

Electron acceleration during magnetic reconnection is thought to play a key role in time-variable high-energy emission from astrophysical systems. By means of particle-in-cell simulations of trans-relativistic reconnection, we investigate…

高能天体物理现象 · 物理学 2019-10-16 David Ball , Lorenzo Sironi , Feryal Özel

The rate of reconnection characterizes how quickly flux and mass can move into and out of the reconnection region. In the Terrestrial Reconnection EXperiment (TREX), the rate at which antiparallel asymmetric reconnection occurs is modulated…

The energetic electromagnetic eruptions observed during the prompt phase of gamma-ray bursts are attributed to synchrotron emissions. The internal shocks moving through the ultrarelativistic jet, which is ejected by an imploding…

高能天体物理现象 · 物理学 2010-11-22 Gareth C. Murphy , Mark E. Dieckmann , Luke O'C Drury

Magnetic reconnection is best known from observations of the Sun where it causes solar flares. Observations estimate the reconnection rate a small, but non-negligible fraction of the Alfv\'en speed, so-called fast reconnection. Until…

太阳与恒星天体物理 · 物理学 2017-02-15 Andrey Beresnyak

The electromagnetic energy equation is analyzed term by term in a 3D simulation of kinetic reconnection previously reported by \citet{vapirev2013formation}. The evolution presents the usual 2D-like topological structures caused by an…

等离子体物理 · 物理学 2015-06-18 Giovanni Lapenta , Martin Goldman , David Newman , Stefano Markidis , Andrey Divin

Using a 2-1/2-dimensional particle-in-cell (PIC) code to simulate the relativistic expansion of a magnetized collisionless plasma into a vacuum, we report a new mechanism in which the magnetic energy is efficiently converted into the…

天体物理学 · 物理学 2008-11-26 Edison Liang , Kazumi Nishimura , Hui Li , S. Peter Gary

Electron dynamics and energization are one of the key components of magnetic field dissipation in collisionless reconnection. In 2D numerical simulations of magnetic reconnection, the main mechanism that limits the current density and…

等离子体物理 · 物理学 2019-10-09 F. Pucci , S. Usami , H. Ji , X. Guo , R. Horiuchi , S. Okamura , W. Fox , J. Jara-Almonte , M. Yamada , J. Yoo