Tag: Magnetic field
Periodic solutions may continue under small electromagnetic perturbations
What the study found The paper shows that non-circular periodic solutions of an unperturbed central force problem may be continued to periodic solutions when small electromagnetic perturbations are introduced. The authors consider both fixed-period problems and, when the perturbation does not depend on time, fixed-energy problems. Why the authors say this matters The authors state…
Subgrid dynamo model reproduces magnetic field cycles in thin disks
What the study found A subgrid model of a helical large-scale dynamo with dynamical quenching was derived and implemented in general-relativistic resistive magnetohydrodynamic simulations of geometrically thin accretion disks. The model reproduced butterfly diagrams seen in earlier simulations and, in some cases, produced weak collimated polar outflows. Why the authors say this matters The authors…
Curvature shapes chiral transport and entanglement in fermions
What the study found The study found that spacetime curvature in AdS2 and AdS2 black hole backgrounds can produce strongly asymmetric, or chiral, wave propagation for Dirac fermions. The authors report that this propagation is confined within an inhomogeneous Lieb-Robinson cone, a bound on how fast information spreads in a system. Why the authors say…
Cyclotron rotation and ion waves drive nickel isotope enrichment
What the study found The study found that a self-consistent model can explain the unusually large enrichment of nickel isotopes seen in ablation plumes from ultrafast laser irradiation of solid surfaces. The model centers on a spontaneous magnetic centrifuge in the plasma, with cyclotron rotation of ions and ion Bernstein waves (IBWs, broad-spectrum plasma waves)…
GVEC provides flexible 3D MHD equilibrium solutions
GVEC solves 3D magnetohydrodynamic equilibrium equations for stellarators using flexible coordinates that represent complex plasma boundaries with simple cross-sections.
Analytical model estimates MHD pressure losses in lead-lithium flow
Analytical model and CFD validation for MHD pressure drop in lead-lithium flows for fusion reactor breeding blankets under variable magnetic field conditions.
Shock precursor type changes ion and electron acceleration
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in AstrophysicsSimulations reveal two distinct regimes in transrelativistic shocks where competing plasma instabilities produce dramatically different particle acceleration efficiencies for ions and electrons.
Cold ions enable ion-acoustic waves in asymmetric reconnection
Particle-in-cell simulations characterize ion-acoustic wave excitation and energy transfer mechanisms in asymmetric magnetic reconnection with cold ion populations.
