Photoionization rates of oxygen and nitrogen at 800 nm measured by Thomson coherent microwave scatteringIn this study, we report on the use of Thomson coherent microwave scattering (CMS) to characterize photoionization rates in oxygen and nitrogen at 800 nm over a range spanning approximately three…K. Reindersma, M. Malaussena, S. Anantaram et al.·Nov 4, 2026SaveLearn
Influence of Laguerre-Gaussian pulse mode purity on positron acceleration in nonlinear wakefieldsThe acceleration of positrons in wakefields remains a crucial challenge. One proposal has been to use Laguerre-Gaussian laser pulses as drivers, which provide corresponding accelerating and focusing…Lars Reichwein·Nov 4, 2026SaveLearn
First ray-tracing simulations of mode conversion using metaplectic geometrical opticsAdvanced scenarios of radiofrequency power deposition into magnetically confined fusion plasmas, particularly those using electron Bernstein waves, involve linear mode conversion (energy transfer…Rui Kai Lee, Valerian H. Hall-Chen, I. Y. Dodin·Nov 4, 2026SaveLearn
Spontaneous Enhancement of Inward Impurity Pinch during Massive Impurity Injection in Tokamak PlasmasA spontaneous enhancement of inward impurity pinch is identified prior to the fast quench under massive impurity injection on the EAST tokamak. The transition is marked by a rapid shift of the…L. Zeng, W. Xia, D. Hu et al.·Nov 4, 2026SaveLearn
Electron Kinetics in the Sheath of Atmospheric Pressure Plasmas in Helium and Helium:H2O VaporThe electron energy distribution function (EEDF) plays a central role in determining the rates of electron-induced reactions in the bulk plasma, the sheath, and at the plasma-surface interface.…Uwe Kortshagen·Nov 3, 2026SaveLearn
Modeling runaway electron mitigation via passively driven plasma instabilities in a high-current tokamakA critical challenge for tokamak-based fusion power plants is the formation of high-current, relativistic runaway electron (RE) beams during abrupt confinement loss events called disruptions. RE…R Datta, C Clauser, G Hu et al.·Nov 3, 2026SaveLearn
Eddy currents and error fields in the toroidally segmented shell configuration aka ArmadilloA stream function formulation for the calculation of the eddy current distribution in a toroidally segmented conducting shell (Armadillo) is presented and verified. The governing Poisson-like…D. Abate, A. Corbioli, G. Marchiori·Nov 3, 2026SaveLearn
The preplasma origin of the plasma-mirror reflectivity responsePlasma mirrors (PM) enhance the temporal contrast of high-power lasers, but declining reflectivity at subrelativistic intensities limits their energy throughput. Here we show that prepulse-generated…Zhongwei Wang, Douglass Schumacher·Nov 3, 2026SaveLearn
Conceptual Design of Pumping Systems up to 1000 m3/s Based on Non-Evaporable Getters in a Gas-Dynamic Magnetic TrapThe Gas-Dynamic Magnetic Trap (GDMT), a new linear magnetic facility for confining high-temperature hydrogen plasma, is currently under development at the Budker Institute of Nuclear Physics (BINP SB…Alexey M. Semenov, Nataliy G. Vasilieva, Sergey V. Polosatkin·Nov 3, 2026SaveLearn
High-Efficiency Wakefield Acceleration of Positrons via a Slit Plasma ChannelAlthough plasma-based wakefield acceleration has achieved remarkable success for electrons, efficient positron acceleration remains a long standing challenge, as positrons suffer severe defocusing in…Yu-Jie Wang, Xing-Long Zhu, Hong-Kang Zuo et al.·Nov 3, 2026SaveLearn
A Two-Dimensional Physics-Informed Neural Network Model of a Hall Effect Thruster Plasma: Self-Consistent Electrostatics and Physical-Consistency DiagnosticsWe present a two-dimensional axisymmetric physics-informed neural network (PINN) of the discharge channel of the P5 Hall thruster at 300 V and 5.4 A, which solves eleven coupled plasma fields and…Josh Adjedj, Subrata Roy·Nov 3, 2026SaveLearn
Dynamics of Vortex Electrons in a Uniform Magnetic Field Across Nonrelativistic and Relativistic RegimesThe dynamics of a vortex electron in a transverse uniform magnetic field involves not only the cyclotron motion of the wave packet center but also the evolution of its internal wavefunction…Yujian Lin, Zhigang Bu, Shiyu Liu et al.·Nov 3, 2026SaveLearn
Comparison of models for dynamical structures of solar plasmaPossible mechanisms of generation of dynamical plasma structures are associated with the Schwarzschild criterion for convective instability and with excess energy (heat, magnetic): due to the…S. N. Artekha·Nov 2, 2026SaveLearn
Numerical Study of Two-Frequency Heating in ECR Ion SourceThe two-frequency heating (TFH) method is widely used to improve the performance of electron cyclotron resonance (ECR) ion sources, yet its physical mechanisms remain insufficiently understood. In…E. Yu. Kidanova, V. E. Mironov, D. K. Pugachev·Nov 2, 2026SaveLearn
Stabilization of kinetic plasma instabilities via instantaneous external field controlWe propose an instantaneous control framework for the stabilization of kinetic plasma instabilities using external fields. The control problem is formulated as a PDE-constrained optimization that…Jiyoung Yoo, Jingwei Hu·Nov 1, 2026SaveLearn
Influence of the Coulomb Interaction on the Radiation of a Few Body SystemUnderstanding energy absorption in laser-plasma interactions is crucial for applications ranging from inertial confinement fusion to particle acceleration. At the most fundamental level, this energy…Zukhriddin Ruziev, Caterina Cocchi, Anvar Khujakulov·Nov 1, 2026SaveLearn
First-principles simulation of free-electron lasers with the Galilean electromagnetic particle-in-cell method: even harmonics of planar undulatorsFree-electron laser (FEL) codes average the electron motion over the undulator period and add the radiation harmonics through on-axis coupling factors. This is accurate for the fundamental, but the…Alexander Pukhov·Nov 1, 2026SaveLearn
Implicit-Explicit Methods for the GX Gyrokinetics CodeGyrokinetic simulations are crucial for understanding turbulent transport in magnetic confinement fusion devices. Unfortunately, these simulations are typically extremely expensive, particularly when…Patrick S. Kim, Noah R. Mandell, Ian G. Abel et al.·Oct 31, 2026SaveLearn
Towards reactor-relevant electromagnetic turbulence in the MAST-U spherical tokamakWe investigate electromagnetic ion-scale turbulence in a high-performing H-mode plasma of the Mega Ampere Spherical Tokamak Upgrade (MAST-U) with local gyrokinetic simulations, asking whether it…Daniel Kennedy, Yujia Zhang, Bhavin S Patel et al.·Oct 30, 2026SaveLearn
Machine learning surrogates for multi-geometry EDGE2D-EIRENE studies of MAST UpgradeTwo-dimensional edge plasma transport simulations provide a detailed description of divertor plasma behaviour, but their computational cost limits large parameter scans and iterative modelling. We…George K. Holt, Lorenzo Zanisi, Romain Futtersack et al.·Oct 30, 2026SaveLearn
Stabilization of counter propagating currents by energy conservation in collisionsCurrent filamentation generates magnetic fields and shapes electron transport in dense plasmas, where collisions can either suppress or enhance its growth. Here we show that conserving electron…Thomas Kluge, Jannis Schulz, Arthur Hirsch-Passicos et al.·Oct 30, 2026SaveLearn
An approximate separation of the electron and positron degrees of freedom in the Dirac-Heisenberg-Wigner formalismHere we study the quantum relativistic phase-space description of the Dirac field referred to as the Dirac--Heisenberg--Wigner (DHW) formalism. By applying a systematic expansion procedure in weak…Gert Brodin, Sebastian Lundström·Oct 30, 2026SaveLearn
Accelerating Computation and Resolving Extraneous Roots in the Kinetic Plasma Dispersion Relation Solver BOKinetic dispersion relations are widely used to study waves and instabilities in space, astrophysical, and laboratory plasmas. Iterative root searches depend on initial guesses and may fail to…Xizhi Tian, Huasheng Xie, Long Wei·Oct 30, 2026SaveLearn
Plasmoid Instability in Inhomogeneous Current SheetsPlasmoid instability in inhomogeneous current sheets is investigated using electromagnetic gyrokinetic simulations of collisionless magnetic reconnection. Simulations with and without small random…Kazuma Ikeda, Ryusuke Numata·Oct 30, 2026SaveLearn
Teacher-guided multi-task learning for integrated plasma monitoring on EASTThis paper integrates tokamak plasma disruption prediction, Edge-Localized Mode (ELM) monitoring, Multifaceted Asymmetric Radiation From the Edge (MARFE) detection, and H/L-mode identification into a…Yunhu Jia, Wenhui Hu, Bihao Guo et al.·Oct 30, 2026SaveLearn