physics.plasm-ph 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.

Cyclic reformation of subcritical perpendicular fast magnetosonic shocks due to oblique Whistler waves

Two-dimensional PIC simulations reveal that subcritical perpendicular fast magnetosonic shocks undergo cyclic reformation driven by an oblique lower-hybrid gradient drift instability, where the coupling between backward-propagating oblique Whistler waves and forward-propagating ion acoustic waves modulates the magnetic field and forces the shock to collapse and reform without external perturbations.

ME Dieckmann, L Palodhi, M Francois, D Folini, R Walder2026-04-02🔬 physics

Moment-preserving particle merging via non-negative least squares

This paper proposes a novel particle merging algorithm for rarefied gas dynamics simulations that conserves arbitrary velocity and spatial moments, as well as collision rates, by solving a non-negative least squares problem, thereby significantly reducing merging-induced errors in macroscopic quantities.

Georgii Oblapenko, Manuel Torrilhon2026-04-02🔬 physics

Real-time virtual circuits for plasma shape control via neural network surrogates: dynamic validation in closed-loop simulations

This paper demonstrates that neural network emulators of virtual circuits can robustly and effectively control MAST Upgrade plasma shapes in real-time closed-loop simulations, offering a low-latency alternative to traditional physics-based controllers for future fusion devices.

K. Pentland, A. Ross, N. C. Amorisco, P. Cavestany, T. Nunn, A. Agnello, G. K. Holt, C. Vincent2026-04-02🔬 physics

Ultrafast Kilowatt-Range Microwave Pulsing for Enhanced CO2 Conversion in Atmospheric-Pressure Plasmas

This study demonstrates that ultrafast kilowatt-range microwave pulsing enhances CO2 conversion and energy efficiency in atmospheric-pressure plasmas, achieving up to 40% and 20% improvements respectively in a Surfaguide-based reactor, though these gains are suppressed in a cavity-based torch due to rapid afterglow quenching and the absence of a plasma reignition regime.

S. Soldatov, L. Silberer, C. K. Kiefer, G. Link, A. Navarrete, J. Jelonnek2026-04-02🔬 physics

The impact of plasma turbulence on atomic reaction rates in the detached ASDEX Upgrade divertor

Numerical modeling of the ASDEX Upgrade divertor reveals that turbulent fluctuations in detached conditions significantly reduce local ionization and radiation rates by at least 50% compared to mean-field predictions, primarily due to negative density-temperature correlations that drive plasma states below ionization thresholds and enhance recombination.

Konrad Eder, Wladimir Zholobenko, Andreas Stegmeir, Kaiyu Zhang, Frank Jenko2026-04-01🔬 physics

Conservation of magnetic-helicity fluctuations due to spatial decorrelation of fluxes in decaying MHD turbulence

This paper develops a theoretical framework to explain the conservation of magnetic-helicity fluctuations in decaying MHD turbulence by analyzing boundary terms associated with long-range spatial correlations, finding that such correlations are dynamically suppressed in local and most non-local gauges (including Coulomb) but can arise in specific non-local gauges, a result verified by high-resolution numerical simulations.

Justin Kin Jun Hew, David N. Hosking, Christoph Federrath, James R. Beattie, Neco Kriel2026-04-01🔭 astro-ph

The influence of Parker spiral on the reflection-driven turbulence

This study demonstrates that incorporating the Parker spiral into reflection-driven turbulence models alters the outer scales and turnover times of turbulent eddies, thereby preventing the cascade from freezing and enabling more efficient heating of the solar wind while maintaining strong imbalanced turbulence at larger heliocentric distances.

Khurram Abbas, Jonathan Squire2026-04-01🔭 astro-ph

Low-Order Bessel-Type PID Dynamics in Lithium-Based Tritium Breeding and Heat-Removal Systems

This paper presents a low-order analytical framework demonstrating that lithium-based tritium breeding and heat-removal systems in fusion reactors exhibit Bessel-type dynamics, enabling the effective application of PID controllers to manage thermal expansion and tritium inventory errors.

S. A. S. Borges (Federal University of São Carlos), S. D. Campos (Federal University of São Carlos)2026-04-01✓ Author reviewed ⓘ⚛️ nucl-ex

Permeation behaviour of hydrogen isotopes in molten FLiBe (2LiF-BeF2): Identifying sources of uncertainty and associated measurement challenges

This study utilizes the HYPERION facility to systematically quantify hydrogen isotope permeability in molten FLiBe, revealing that bubble-laden interfaces significantly suppress transport and challenging previous assumptions to explain the wide scatter in existing transport data.

Abhishek Saraswat, Weiyue Zhou, Nayoung Kim, Jaron F. Cota, Guiqiu Zheng, Alexander A. Khechfe, Caroline S. Barthel, Michael P. Short, Rémi Delaporte-Mathurin, Kevin B. Woller2026-04-01🔬 physics

Seeding of Self-Modulation using Truncated Seed Bunches as a Path to High Gradient Acceleration

This paper demonstrates that truncated electron bunch seeding of self-modulation (teSSM), achieved by cutting available seed bunches with a relativistic ionization front, enables reproducible, controlled high-gradient particle acceleration at plasma densities up to $7\times10^{14}\mathrm{cm}^{-3}$ while increasing seed wakefield amplitude.

N. Z. van Gils, E. Belli, M. Bergamaschi, A. Clairembaud, A. Gerbershagen, E. Gschwendtner, H. Jaworska, J. Mezger, M. Moreira, P. Muggli, F. Pannell, L. Ranc, M. Turner, the AWAKE Collaboration2026-04-01🔬 physics

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