Numerical methods for stellarator simulations in BOUT++Modeling the Scape-off layer (SOL) of stellarator fusion devices is challenging due to the complicated magnetic topology, requiring numerical tools to solve transport equations for realistic…David Bold, Brendan Shanahan·Mar 30, 2026SaveLearn
Bright Spot Characterization of Low dI/dt X-pinch Plasmas using Soft X-ray Spectroscopy with Bennett RelationThis study investigates the characteristics of X-pinch plasmas driven under low current rise rate (dI/dt) conditions using soft x-ray spectroscopy combined with the Bennett relation. X-pinch…YeongHwan Choi, Muhyeop Cha, Hakmin Lee et al.·Mar 30, 2026SaveLearn
Permeation behaviour of hydrogen isotopes in molten FLiBe (2LiF-BeF2): Identifying sources of uncertainty and associated measurement challengesThis paper presents results from systematic investigations conducted in the HYPERION facility to quantify permeabilities of hydrogen isotopes in FLiBe over a temperature range of 773K - 973K. To…Abhishek Saraswat, Weiyue Zhou, Nayoung Kim et al.·Mar 30, 2026SaveLearn
Simulation Design for Velocity-Controlled Spatio-Temporal Drivers in Laser Wakefield AccelerationVelocity-controlled spatio-temporal (ST) laser drivers offer a route to tailoring laser-plasma interactions by allowing the velocity of the intensity peak to be controlled independently of the…Chiara Badiali, Rafael Almeida, Thales Silva et al.·Mar 30, 2026SaveLearn
From molecular dynamics to kinetic models: data-driven generalized collision operators in 1D3V plasmasWe present a data-driven approach for constructing generalized collisional kinetic models for inhomogeneous plasmas in one-dimensional physical space and three-dimensional velocity space (1D-3V). The…Yue Zhao, Guosheng Fu, Huan Lei·Mar 29, 2026SaveLearn
Optimization of Laser Irradiation Uniformity for the Double-Cone Ignition Scheme with MULTI-3D simulationsThe double-cone ignition (DCI) scheme holds a promising perspective for laser driven fusion energy and astrophysics. However, optimizing the laser irradiation uniformity under the constraints of…Yicheng Wang, Yiwen Yang, Fuyuan Wu et al.·Mar 28, 2026SaveLearn
Tearing and Kelvin-Helmholtz dynamics in fully kinetic particle-in-cell simulations of electron-scale current sheetsWe investigate the stability and nonlinear evolution of localized electron-scale current sheets using fully kinetic, electromagnetic particle-in-cell (PIC) simulations in two and three dimensions. By…Sushmita A. Mishra, Gurudatt Gaur·Mar 28, 2026SaveLearn
A Unified theory of transport barriers (TBs) in magnetically confined systemsA thermodynamic model of a plasma boundary layer, characterized by enhanced temperature contrasts is proposed. The theory is constructed to determine the inner boundary temperature T1 for a…Swadesh M. Mahajan, David R. Hatch, Zensho Yoshida et al.·Mar 27, 2026SaveLearn
Applications of a novel model-based real-time observer for electron density profile control experiments in TCVReal-time control of tokamak plasmas encompasses sustaining a high-performance stationary state, avoiding disruptions, and managing ramp-up and ramp-down phases. Real-time estimation and control of…F. Pastore, O. Sauter, F. Felici et al.·Mar 27, 2026SaveLearn
Radiation safety considerations for ultrafast lasers beyond laser machiningThe interaction of ultrafast lasers with plasmas has been studied for many years, primarily with respect to fundamental emission mechanisms. Only in recent years has ionizing radiation emerged as a…Simon Bohlen, Julian Holland, Rudolf Weber·Mar 26, 2026SaveLearn
Study of Low-Frequency Core-Edge Coupling in a Tokamak: I. Experimental Observation in KSTARDouble-peaked fishbone events across multiple KSTAR discharges are investigated. The normalized beta βN and the edge safety factor q95 under which the fishbones appear…Wonjun Lee, Andreas Bierwage, Seungmin Bong et al.·Mar 25, 2026SaveLearn
Experimental Evidence for Increased Particle Fluxes Due to a Change in Transport at the Separatrix near Density Limits on Alcator C-ModExperimental inferences of cross-field particle flux at the separatrix, sep, show rapid growth near H-mode and L-mode density limits at high magnetic field on Alcator C-Mod.…M. A. Miller, J. W. Hughes, T. Eich et al.·Mar 25, 2026SaveLearn
Study of Low-Frequency Core-Edge Coupling in a Tokamak: II. Spatial Channeling & Focusing In Antenna-Driven MHDMotivated by evidence for core-edge coupling in the form of double-peaked fishbone-like low-frequency modes ( 20\, kHz) in KSTAR, which exhibit synchronized Alfv\'enic activity both…Andreas Bierwage, Wonjun Lee, Young-chul Ghim et al.·Mar 25, 2026SaveLearn
Self-Consistent Numerical Framework for Multiscale Circuit-Plasma Coupling with Secondary Electron EmissionVoltage breakdown in high-voltage pulsed vacuum systems arises from nonlinear multiscale interactions among circuit dynamics, kinetic plasma evolution, and ion-induced secondary electron emission…Hongbin Kim, Soung Yong Yun, Jaeguk Lee et al.·Mar 25, 2026SaveLearn
Clumps in the Resistive-Drift-Wave turbulenceThe results of numerical simulations of the Hasegawa-Wakatani equation demonstrate that, similarly to decaying turbulence in 2D fluids, at a small electron adiabaticity parameter, the…S. I. Krasheninnikov, R. D. Smirnov·Mar 25, 2026SaveLearn
Laser ion acceleration from concave targets by subpicosecond pulsesLaser-driven proton acceleration provides a powerful route for generating ultrashort, high-charge proton beams. Many applications, including secondary neutron sources and inertial fusion, benefit…K. V. Lezhnin, V. Ospina-Bohórquez, J. Griff-McMahon et al.·Mar 25, 2026SaveLearn
Microtearing Thresholds and Second-Stable Ballooning in the DIII-D Pedestal: Reduced Modeling and Core-Edge ImplicationsGlobal and local linear gyrokinetic simulations of 42 pedestal equilibria from three DIII-D discharges are used to investigate pedestal stability and its impact on pedestal structure and confinement.…David R. Hatch, Leonhard A. Leppin, Mike T. Kotschenreuther et al.·Mar 24, 2026SaveLearn
Optical modelling of shaped laser pulses in plasmaThis work provides a brief review of the numerical methods for modelling the optical propagation of an ultrashort, intense laser pulse in plasmas and ionizable gases. These methods are implemented in…Igor A. Andriyash, Cedric Thaury·Mar 24, 2026SaveLearn
Anisotropic truncation for turbulent transport and zonal flows in the Hasegawa-Wakatani systemReduced models based on an anisotropic truncation of the Fourier space, retaining only a few poloidal wave-numbers while keeping the full radial resolution, are developed and first applied to the…Pierre L. Guillon, Robin Angles, Yanick Sarazin et al.·Mar 24, 2026SaveLearn
CMA-Unfold A Covariance Matrix Adaptation unfolding algorithm for stacked calorimeter detectorsStacking calorimeters also refered as bremsstrahlung cannons widely used in inertial confinement fusion and ultra-intense laser plasma experiments have become essential diagnostics for characterizing…G. Fauvel, A. Arefiev, M. Manuel et al.·Mar 24, 2026SaveLearn
Wave-particle equilibria with heavy ions in weakly collisional space plasmasSpace plasmas are weakly collisional since characteristic time scales related to Coulomb collisions are much larger than those of Larmor gyration or wave--particle interactions. Thus, wave activity…Nicolás Villarroel-Sepúlveda, Daniel Verscharen, Pablo S. Moya et al.·Mar 23, 2026SaveLearn
Statistical Flux Freezing with Magnetic Path-lines in TurbulenceMagnetic flux freezing states that, in ideal magnetohydrodynamics, magnetic flux is transported by the flow and magnetic field lines remain frozen into the plasma. In turbulent plasmas, however, the…Amir Jafari·Mar 23, 2026SaveLearn
Optical smoothing broadens cross beam energy transfer resonanceWe use the theoretical framework introduced in the companion paper to provide simple formulas as regards the resonance conditions for CBET with smoothed laser beams.Our analytical CBET model with…Y. Lalaire, C. Ruyer, A. Debayle et al.·Mar 23, 2026SaveLearn
On the influence of optical smoothing techniques on cross-beam energy transferIn the context of inertial confinement fusion (ICF) experiments, spatial and temporal laser beam smoothing techniques are used to control the beams propagation in hohlraum plasmas. Currently, spatial…Y. Lalaire, C. Ruyer, A. Debayle et al.·Mar 23, 2026SaveLearn
From the First to Subsequent Pulses: Evolution of Discharge inside a Preformed Bubble in WaterThe evolution of pulsed discharge behavior inside a preformed air bubble in water from the first to subsequent pulses was experimentally investigated using a synchronized needle to bubble system. A…Yang Xia, Siyuan Liu, Zhanqiang Liu et al.·Mar 23, 2026SaveLearn