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The combination of an exact and Corner Transfer Matrix Renormalization Group (CTMRG) methods is used to study an influence of external electric and magnetic fields on existence of intriguing reentrant magnetic transitions in a coupled…

Statistical Mechanics · Physics 2020-04-22 Hana Čenčariková , Jozef Strečka , Andrej Gendiar

COCONUT is a global coronal magnetohydrodynamic model recently developed. In order to achieve robustness and fast convergence to steady-state, several assumptions have been made during its development, such as prescribing filtered…

Solar and Stellar Astrophysics · Physics 2023-06-16 Michaela Brchnelova , Błażej Kuźma , Fan Zhang , Andrea Lani , Stefaan Poedts

Elemental rare-earth metals provide a playground for studying novel electron correlation effects and complex magnetism. However, ab initio simulations of these systems remain challenging. Here, we employ fully charge self-consistent density…

Strongly Correlated Electrons · Physics 2024-12-23 Wenjun Ding , Yogesh K. Vohra , Cheng-Chien Chen

We performed magnetohydrodynamic simulation of a formation process of coronal mass ejections (CMEs), focusing on interaction (reconnection) between an ejecting flux rope and its ambient field. We examined three cases with different ambient…

Solar and Stellar Astrophysics · Physics 2015-05-19 Daikou Shiota , Kanya Kusano , Takahiro Miyoshi , Kazunari Shibata

We review the current literature on the formation of Coherent Structures (CoSs) in strongly turbulent 3D magnetized plasmas. CoSs (Current Sheets (CS), magnetic filaments, large amplitude magnetic disturbances, vortices, and shocklets)…

High Energy Astrophysical Phenomena · Physics 2023-05-03 Loukas Vlahos , Heinz Isliker

We report experimental results validating the concept that plasma confinement is enhanced in a magnetic cusp configuration when beta (plasma pressure/magnetic field pressure) is order of unity. This enhancement is required for a fusion…

We propose a novel deformation corrected compressed sensing (DC-CS) framework to recover dynamic magnetic resonance images from undersampled measurements. We introduce a generalized formulation that is capable of handling a wide class of…

Computer Vision and Pattern Recognition · Computer Science 2014-09-04 Sajan Goud Lingala , Edward DiBella , Mathews Jacob

This paper is the third in a series of papers working towards the construction of a realistic, evolving, non-linear force-free coronal field model for the solar magnetic carpet. Here, we present preliminary results of 3D time-dependent…

Solar and Stellar Astrophysics · Physics 2013-03-07 K. A. Meyer , D. H. Mackay , A. A. van Ballegooijen , C. E. Parnell

We perform two- and three-dimensional particle-in-cell simulations of reconnection in magnetically-dominated pair plasmas subject to strong Compton cooling. Reconnection under such conditions operates in accretion disk coronae around black…

High Energy Astrophysical Phenomena · Physics 2020-08-19 Lorenzo Sironi , Andrei M. Beloborodov

We propose and analyze a class of particle methods for the Vlasov equation with a strong external magnetic field in a torus configuration. In this regime, the time step can be subject to stability constraints related to the smallness of…

Numerical Analysis · Mathematics 2023-05-16 Francis Filbet , Luis Miguel Miguel Rodrigues

In this work, we propose a method for the compression of the coupling matrix in volume\hyp surface integral equation (VSIE) formulations. VSIE methods are used for electromagnetic analysis in magnetic resonance imaging (MRI) applications,…

Computational Engineering, Finance, and Science · Computer Science 2022-01-26 Ilias I. Giannakopoulos , Georgy D. Guryev , Jose E. C. Serralles , Ioannis P. Georgakis , Luca Daniel , Jacob K. White , Riccardo Lattanzi

Time-evolving magnetohydrodynamic (MHD) coronal modeling, driven by a series of time-dependent photospheric magnetograms, represents a new generation of coronal simulations. This approach offers greater realism compared to traditional…

Coronal mass ejections (CMEs) are phenomena in which the Sun suddenly releases a mass of energy and magnetized plasma, potentially leading to adverse space weather. Numerical simulation provides an important avenue for comprehensively…

Solar and Stellar Astrophysics · Physics 2025-02-21 Jinnan Cai , Ling Zhang , Chaowei Jiang , Kuo Yan , Xueshang Feng , Pingbing Zuo , Yi Wang

Conventional magnetic flux concentrators (MFCs) are typically designed with solid structures, which may not be optimal for applications requiring lightweight design or material efficiency. In this study, we investigate the feasibility of…

Applied Physics · Physics 2025-06-12 Yujun Shi , Xiaoting Feng

Optimizing the performance of magnetic confinement fusion devices is critical to achieving an attractive fusion reactor design. Negative triangularity (NT) scenarios have been shown to achieve excellent levels of energy confinement, while…

Plasma Physics · Physics 2025-04-02 P. Ulbl , A. Stegmeir , D. Told , G. Merlo , K. Zhang , F. Jenko

We calculate the magnetic moment caused by the persistent currents in polygonal carbon nanotube tori by the tight binding model. The polygonal CNT tori are formed by introducing heptagonal and pentagonal defects along the inner hole and…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Ryo Tamura , Mitsuhiro Ikuta , Toru Hirahara , Masaru Tsukada

To enhance the core heating efficiency in fast ignition laser fusion, the concept of relativistic electron beam guiding by external magnetic fields was evaluated by integrated simulations for FIREX class targets. For the cone-attached shell…

Measurements of the various plasma configurations produced by a planar magnetized coaxial gun provide insight into the magnetic topology evolution resulting from magnetic helicity injection. Important features of the experiments are a very…

Plasma Physics · Physics 2009-11-10 S. C. Hsu , P. M. Bellan

In dilute astrophysical plasmas, thermal conduction is primarily along magnetic field lines, and therefore highly anisotropic. As a result, the usual convective stability criterion is modified from a condition on entropy to a condition on…

Astrophysics · Physics 2008-11-26 Ian J. Parrish , James M. Stone

We present the first global simulations of self-gravitating magnetized tori. The simulations are performed with Zeus-2D and GLOBAL. We find the magnetorotational instability (MRI) to behave similarly in a self-gravitating environment as in…

Astrophysics · Physics 2009-11-10 Sebastien Fromang , Jean-Pierre De Villiers , Steven A. Balbus