Plasmon-polaritons in a rarefied nonrelativistic neutron gasThe electromagnetic properties of a dilute unpolarized nonrelativistic neutron gas are described in the case when neutron-by-neutron scattering is negligible. The Gaussian (Maxwell-Boltzmann) and…P. O. Kazinski, A. M. Trushchuk·Aug 23, 2026SaveLearn
Modified Kalman Filtering Derived from Non-Maxwellian Distribution Functions in Open SystemsKalman filtering (KF) recursively infers plasma quantities, represented by a state, from noisy diagnostics while propagating uncertainty in the inferred state separately from diagnostic noise. For…Olivier Izacard·Aug 22, 2026SaveLearn
State-Space Model-Enabled Reinforcement Learning for Magnetic Configuration Controlon EXL-50UAccurate feedback control of the plasma current (Ip) and centroid position (Rc,Zc) is essential for the stable operation of spherical torus (ST) plasmas. Conventional…Pei Guo, Zhengyuan Chen, Jianguo Chen et al.·Aug 22, 2026SaveLearn
AXUV synthetic diagnostic for ASDEX Upgrade and its application for SPI simulationsWe introduce an Absolute eXtended UltraViolet (AXUV) diode-based camera forward-modelling tool to support the validation of mitigated disruption simulations and the interpretation of experimental…Ferenc Lengyel, Weikang Tang, Matthias Hölzl et al.·Aug 21, 2026SaveLearn
First step toward multi machine ELM energy scalings and extrapolations to SPARC and ITERIt is shown that the ELM energy loss normalized by the plasma stored energy (ΔEELM/Wplasma) for high-density small/QCE ELM regimes scales inversely with the separatrix turbulence parameter at. In…R. Perillo, A. Redl, T. Eich et al.·Aug 21, 2026SaveLearn
Reinforcement learning for vertical position control on the EXL-50U spherical tokamakVertical position control is essential for sustaining high-performance operation in spherical tokamaks, where increased plasma elongation introduces stringent requirements on fast and robust…Lei Xing, Huicong Ma, Changquan Yu et al.·Aug 21, 2026SaveLearn
Advantage-level Aggregation Reinforcement Learning for X-point Target Magnetic Configuration Control in an EXL-50U Experiment-Calibrated Simulation EnvironmentManaging divertor heat loads is a central challenge for compact, high-power tokamaks. To increase local flux expansion and decouple the dissipation volume from the core, EHL-2 adopts the X-point…Siqi Ding, Xuanhe Wang, Pei Guo et al.·Aug 21, 2026SaveLearn
Two-fluid effects on the nonlinear dynamics of RFP relaxationThis study investigates the role of two-fluid effects during magnetic relaxation in reversed-field pinch (RFP) plasmas. Within the multiple-helicity (MH) regime, two-fluid simulations produce…Wentan Yan, Ping Zhu, Hong Li et al.·Aug 21, 2026SaveLearn
Power-law-anchored residual learning for H-mode energy confinement time in tokamaks: interpolation and parameter-defined extrapolationReliable prediction of the energy confinement time is essential for magnetic-confinement fusion. Conventional power-law scalings provide constrained extrapolation trends but cannot represent complex…Zhaokun Wang, Tianyuan Liu, Jianguo Chen et al.·Aug 21, 2026SaveLearn
Zero-dimensional multi-physics-constrained parameter design and optimization for advanced quasi-isodynamic stellaratorsA zero-dimensional (0D) multi-physics-constrained framework for parameter design and optimization of Stable Quasi-Isodynamic Designs (SQuIDs) is presented. Single- and multi-objective optimizations…Ziyuan Sun, Zixuan Guo, Xianglin Hao et al.·Aug 21, 2026SaveLearn
Gas release from metals under irradiation with elliptic Gaussian laser beam during LID-QMS analysisLaser-induced-desorption quadrupole-mass-spectrometry (LID-QMS) diagnostics is considered as one of the candidate methods for the remote control of tritium inventory in the ITER first wall. Studies…A. A. Stepanenko, Yu. M. Gasparyan·Aug 20, 2026SaveLearn
Excitation of the lower-hybrid drift instability in the outflow of electron-only magnetic reconnectionWe report experimental evidence for the lower-hybrid drift instability in the current sheet normal direction of electron-only magnetic reconnection. In our laser-driven capacitor-coil experiment, the…B. K. Russell, K. Sakai, Y. Zhang et al.·Aug 20, 2026SaveLearn
Symmetry-agnostic stellarators for collisionless confinementQuasisymmetry, omnigenity and piecewise omnigenity confine trapped particles by making the bounce action independent of the field-line label. Recent optimizations produce mixed-symmetry stellarators…W. Sengupta, A. Bhattacharjee, S. Buller·Aug 20, 2026SaveLearn
Effect of ion temperature on lunar photoelectron sheathObservations suggest that the solar wind ions impinging on the lunar surface possess a finite temperature. The effect of ion temperature on the plasma sheath over the lunar surface is investigated in…Trinesh Sana, Sanjay K. Mishra·Aug 20, 2026SaveLearn
Simulation of trapped non-neutral plasma dynamics with rotating wall compressionA spectral macroparticle simulation scheme is used to model non-neutral plasma dynamics in a Penning-Malmberg trap. This grid-free numerical scheme is well adapted to the specific geometry of trapped…Luisa Riik, Oliver Boine-Frankenheim·Aug 20, 2026SaveLearn
Revisiting the Growth Rate of the Relativistic Tearing Instability: The Role of the Non-ideal MHD StructureMagnetic reconnection in magnetically dominated pair plasmas is a key process in high-energy astrophysical systems. We revisit the relativistic tearing instability in a Harris current sheet and…Kaoru Sugimoto, Kunihito Ioka, Masaru Shibata·Aug 20, 2026SaveLearn
Collisionless Resonances Set the Size of a Weyl Exceptional RingEliminating continuum degrees of freedom converts conservative dynamics into a dispersive, non-Hermitian response whose topology need not represent the causally selected kinetic dynamics. In…Xianhao Rao, Hong Li, Xuan Sun·Aug 20, 2026SaveLearn
Characterizing the temporal evolution of Biermann-battery-driven magnetic reconnection in laser-ablated plasmasThis paper presents an experimental investigation of magnetic reconnection between two laser-produced expanding plasmas, focusing on the quantitative evaluation of the reconnection rate and energy…T. Morita, Y. Muramoto, S. Isayama et al.·Aug 20, 2026SaveLearn
Determining neutral fueling response to RMPs in MAST using a multi-reservoir particle balance model and EMC3 EIRENEThe application of certain configurations of resonant magnetic perturbations (RMPs) has been shown to cause a plasma pump-out in both L- and H-mode discharges at MAST. In this paper we discuss the…Kurt Flesch, James Harrison, Andrew Kirk et al.·Aug 19, 2026SaveLearn
Informing spectral models for dense plasmas with K-edge absorption measurements of warm dense copperWarm dense matter remains a challenging regime to characterize experimentally and to model with predictive accuracy. Recent experimental platforms have been developed to generate, characterize, and…T. Cordova, E. V. Marley, D. A. Chin et al.·Aug 19, 2026SaveLearn
High-power TCV scenario for conventional and alternative divertor studiesAlternative divertor configurations (ADCs) must be evaluated under boundary plasma conditions approaching reactor-level values to be considered a reliable, physics-based solution for tokamak power…K. Lee, C. Theiler, M. Carpita et al.·Aug 19, 2026SaveLearn
Trapping: The "Waterfall" of Vlasov-Poisson Dynamics and the Post-Transient Emergence of Drift-Independent Hole Structures in Collisionless PlasmasA key aspect of structure formation in collisionless plasmas is particle trapping or, more precisely, the gap this process leaves in the theoretical description. While the dynamics prior to the onset…Hans Schamel·Aug 19, 2026SaveLearn
Beam-Tracing-Based Quantitative Reconstruction of Density Fluctuations in QUEST Using Doppler BackscatteringA three-channel X-/Ku-band Doppler backscattering (DBS) system has been developed and installed on QUEST for turbulence and electric-field measurements. In spherical tokamaks, the large…T. Kinoshita, T. Tokuzawa, V. H. Hall-Chen et al.·Aug 19, 2026SaveLearn
Plasma dynamics near the magnetic X-point of the two-wire model: Theory and SimulationThe two-wire model (TWM) is a magnetic configuration generated by two parallel current-carrying wires, and it contains an X-point at its center and a separatrix. Since the TWM magnetic field is…Bin Ahn·Aug 18, 2026SaveLearn
Neural network predictions of plasma confinement loss in Wendelstein 7-X pellet-fueled dischargesThe energy confinement time is a key parameter of a magnetized fusion plasma, helping to determine whether ignition can occur. Experiments in tokamaks and stellarators have shown that the confinement…K. C. Hammond, J. -P. Bähner, J. Baldzuhn et al.·Aug 18, 2026SaveLearn