725 papers
Plasma physics explores the behavior of the fourth state of matter, a superheated soup of charged particles that makes up most of the visible universe. From the fusion power we hope to harness on Earth to the glowing auroras and distant stars above, this field investigates how these energetic gases interact with magnetic fields and light. It is a dynamic area where extreme conditions reveal fundamental laws of nature in ways solid matter never can.
At Gist.Science, we bridge the gap between these complex discoveries and curious minds by processing every new preprint from arXiv in this category. We transform dense, technical research into clear, plain-language explanations alongside detailed summaries, ensuring that breakthroughs in plasma dynamics and fusion energy are accessible to everyone. Below are the latest papers in plasma physics, curated and simplified for your reading.
This paper utilizes kinetic particle-in-cell simulations and a newly developed numerical solver to demonstrate that both shear flows and guide fields delay the onset of relativistic magnetic reconnection by slowing the linear tearing instability, with high flow shear eventually triggering a transition to Kelvin-Helmholtz instability.
Through a combination of fully kinetic particle-in-cell simulations and laser-driven capacitor-coil experiments, this study demonstrates that rising electric currents expel plasma to form expanding magnetic bubbles that accelerate particles, with the expansion front velocity scaling according to the local Alfvén speed.
High-resolution Vlasov-Poisson simulations demonstrate that the interaction between electrostatic waves and density gaps in kinetic plasmas drives a transition to phase-space turbulence, redistributing anisotropic energy across full phase space and revealing the critical role of inhomogeneities in structure formation.
This paper demonstrates that externally launched helicon waves can effectively suppress runaway electron growth in the DIII-D tokamak through resonant pitch-angle scattering in both ideal and non-ideal antenna configurations, while highlighting that anomalous resonance enhances runaway populations and significant propagation challenges remain for post-disruption applications.
This paper introduces an a posteriori framework implemented in the open-source PyMHD package to directly characterize the anisotropic and spectrally distinct nature of numerical dissipation in MHD turbulence simulations, revealing that it cannot be simply modeled as effective physical viscosity or resistivity while providing practical criteria for ensuring high-fidelity results.
This paper develops a linear theory demonstrating that equilibrium pressure anisotropy in gyrotropic MHD modifies the tearing instability's growth rate and stability thresholds by altering both the ideal outer matching conditions and the resistive inner-layer dynamics, where positive anisotropy generally suppresses the instability while negative anisotropy enhances it.
This paper presents the first experimental evidence of reduced ion stopping power in the strong ion-plasma coupling regime, achieved by injecting laser-accelerated carbon ions into a dense plasma and demonstrating that the observed energy loss aligns with hybrid molecular dynamics calculations incorporating nonlinear screening and quantum effects, thereby challenging standard linear models.
This paper reassesses the accuracy of electron temperature measurements by Thomson scattering in the ITER tokamak, revealing that a previous overestimation of photoelectron yield led to underestimated errors, and concludes that the required 10% accuracy can only be maintained up to 20 keV (or 1 keV under high background radiation) unless the laser pulse energy is increased or the minimum electron density is raised.
This study demonstrates that the X-Point Target divertor configuration on the TCV tokamak exhibits superior inherent disturbance rejection capacity at its secondary X-point compared to a standard single null divertor across various perturbation scenarios, offering passive buffering benefits for power exhaust control while presenting challenges for local state monitoring.
This paper derives a generalized Beth-Uhlenbeck entropy formula for dense fermion systems with strong correlations using the -derivable approach, revealing a unique "squared Lorentzian" spectral density in the near mass-shell limit and extending the formalism beyond the low-density limit to include Mott dissociation and self-consistent back reactions.