Nonuniform Hydrodynamic Plasma-Wave Instability in a Gated Electron ChannelWe report a theoretical and numerical study of plasma-wave instability in a current-driven InGaAs/GaAs gated electron channel. A finite drain current drives the channel away from a uniform…Yuhui Zhang·Sep 11, 2026·Top 80%SaveLearn
First Experimental Evidence of Helicon Current DriveHelicon current drive is an attractive solution for driving current to sustain steady state tokamak operation in reactor conditions. Dedicated DIII-D experiments have been conducted with a MW-level…J. B. Lestz, R. I. Pinsker, B. Van Compernolle et al.·Sep 11, 2026·Top 2%SaveLearn
Experimental Plasma Density Profiles Determined Through Measurements of the Magnetosonic Wave SpeedInformation on plasma density in laboratory plasmas is commonly acquired using either Langmuir probes or optical diagnostics. Here, we present an alternative approach, inferring the density profile…Cameron Kuchta, Jan Egedal, Abhishek Mhatre et al.·Sep 10, 2026SaveLearn
Physics-Informed Neural Networks to Infer the Perpendicular Energy Conductivity in the Scrape-Off Layer of Stellarator DevicesIn this work, we develop an inverse Physics-Informed Neural Network (PINN) framework to infer the dependence of the scrape-off layer (SOL) perpendicular heat conductivity on plasma density and…J. Gallego, P. Protopapas, A. Bustos et al.·Sep 10, 2026SaveLearn
kobra: a new Vlasov code intended for plasma-wall modelingIn a fusion device plasma-wall interactions on the sheath scale can be modeled as a collisionless problem. When modeling these regions particle-in-cell codes suffer from statistical error…Sebastian Konewko, Nathan Maestracci, Sven Van Loo·Sep 10, 2026SaveLearn
Modeling of plasma transport during edge-localized mode in tokamak using a kinetic Vlasov-Poisson codeA kinetic parallel transport code KOBRA based on a finite-volume method is developed to study edge localized mode (ELM) plasma transport from the mid-plane to divertor targets. The large scale…Ce Wang, Sven Van Loo, Geert Verdoolaege·Sep 10, 2026SaveLearn
Particle-resolved pathways to energetic-ion formation in a fluctuating low-current hollow-cathode plumeEnergetic-ion formation in a low-current hollow-cathode plume is investigated using experiments, self-consistent electrostatic particle-in-cell (PIC) simulation, and particle-resolved analysis.…Baisheng Wang, Zilong Peng, Yinjian Zhao et al.·Sep 10, 2026·Top 41%SaveLearn
High-charge, highly polarized positron beams generated from a laser-driven nanowire-array targetThe generation of high-charge, highly polarized positron beams in the interaction of a linearly polarized laser pulse with a nanowire-array target is investigated. Here, laser-driven electrons emit…De-Sheng Zhang, Cui-Wen Zhang, Kun Xue et al.·Sep 9, 2026·Top 53%SaveLearn
A polar-harmonic unified gas-kinetic scheme for magnetized ion dynamics from cyclotron kinetics to the Hall-Pedersen constitutive limitMagnetized ion transport in weakly ionized plasmas ranges from gyroangle-dependent kinetics to Hall-Pedersen drift-diffusion as collisionality and magnetization vary. We develop a polar-harmonic…Yixiao Wang, Zhigang Pu, Xing Ji et al.·Sep 9, 2026·Top 24%SaveLearn
All field strengths are possible locally in Boozer coordinatesThe magnetic field strength is a central design object in the theory of magnetic confinement of plasma. Desirable confinement properties such as quasi-symmetry and omnigenity are characterized by…Taylor J. Klotz, Nathan Duignan, Joshua W. Burby et al.·Sep 8, 2026·Top 7%SaveLearn
RF-Specific Tungsten Erosion and Global Transport in ITER under Neon SeedingIon cyclotron radio-frequency heating (ICRH) is a key auxiliary heating system in ITER, but high-power RF operation can enhance plasma-material interactions through rectified RF sheath potentials on…Atul Kumar, Dhyanjyoti Nath, Wouter Tierens et al.·Sep 8, 2026·Top 31%SaveLearn
Generalized Similarity Theory for PlasmasA generalized theory of plasma similarity is established based on the scaling of the Boltzmann equation coupled with the full set of Maxwell's equations. The predicted similarity scalings are…Yangyang Fu·Sep 8, 2026SaveLearn
Scalable Production of Lead-212 and Actinium-225 Generators with Fusion NeutronsTargeted alpha therapy will require a large expansion of 212Pb and 225Ac production. We propose neutron- and photon-driven routes that convert 230Th, 231Pa, 232Th,…J. F. Parisi, A. Rutkowski·Sep 7, 2026·Top 33%SaveLearn
Runaway electron control by self-excited wavesRunaway-electron avalanches in tokamak plasmas can be limited by kinetic instabilities driven by the non-Maxwellian runaway distribution. We formulate a reduced model for the quasi-steady state in…Kun Huang, Boris Breizman·Sep 7, 2026SaveLearn
Hamiltonian Particle Dynamics in Fusion Plasmas: Orbital Tomography and Spectrum Analysis for Energy and Momentum Transport under Resonant Non-Axisymmetric PerturbationsThis thesis investigates the impact of resonant mode-particle interactions on transport and confinement in toroidal fusion plasmas. Using analytical and numerical approaches, we study how intrinsic…Yiannis Antonenas·Sep 7, 2026SaveLearn
Thresholdless IBW Emission and Alpha-to-Thermal-Ion Energy Channeling via Pole Resonance of Fusion-Product IonsFusion reactions can release a substantial fraction, and in aneutronic reactions nearly all, of their energy as the kinetic energy of fusion-product ions. In magnetized plasmas, these energetic ions…Hong Qin, Nathaniel J. Fisch·Sep 7, 2026·Top 18%SaveLearn
Self-organized positron reorienting and pinching mechanism for the experimental detection of the linear Breit-Wheeler processThe linear Breit-Wheeler (LBW) process (γ+γ→ e-+e+) is a fundamental prediction of quantum electrodynamics, but yet to be observed under laboratory conditions using real photons. In…Yutong He, Alexey Arefiev, Mario Manuel et al.·Sep 7, 2026SaveLearn
Dual-decomposition multi-GPU particle-in-cell method for cylindrical plasmas: Batched Fourier-mode multigrid and balanced particle slabsThree-dimensional electrostatic particle-in-cell (PIC) simulations combine irregular particle operations with a globally coupled Poisson solve, whose preferred parallel decompositions conflict. We…Yinjian Zhao, Xi Chen, Yingjie Chen·Sep 7, 2026·Top 25%SaveLearn
Electromagnetic filament coalescence as magnetic island merging with diamagnetic effectsWe investigate the nonlinear coalescence of two current-carrying ELM filaments using a three-dimensional electromagnetic fluid model. In the flat-density limit, the coalescence exhibits magnetic…Souvik Mondal, N Bisai, Abhijit Sen et al.·Sep 7, 2026·Top 79%SaveLearn
Particle pinch in global tokamak edge simulationsThe inward particle flux, or particle pinch, is routinely observed in magnetically confined fusion experiments, yet its mechanism is not fully understood. We study the particle pinch in the tokamak…Ben Zhu·Sep 6, 2026·Top 26%SaveLearn
Magnetic island structures in relativistic laser-driven plasma channelsWe develop a theoretical model for self-generated magnetic islands in relativistic laser-driven channels in near-critical-density plasmas. The islands arise from the nonlinear superposition of the…Dongchi Cai, Zheng Gong, Guanqi Qiu et al.·Sep 6, 2026·Top 36%SaveLearn
Separation of bi-dispersed microspheres in dusty plasma ratchet experimentsIt is demonstrated experimentally that the effective separation of bi-dispersed microspheres (dust particles) in the underdamped and strongly-coupled regime is realized using a designed dusty plasma…Ting-yu Yao, Ji-xu Gao, Miao Tian et al.·Sep 6, 2026·Top 86%SaveLearn
Experimental realization of a dusty plasma rocking ratchet with current reversalA single dust particle confined in an asymmetric ratchet potential is periodically driven by two oppositely directed laser beams, forming an underdamped dusty plasma rocking ratchet. We…Shun-xin Zhang, Shuo Wang, Ting-yu Yao et al.·Sep 6, 2026·Top 58%SaveLearn
Novel approach to general curvilinear coordinates for plasma fluid applicationsIn general geometry, plasma fluid equations include nonlinear geometric sources associated with fictitious forces, which pose significant challenges to computer simulations. We reformulate the plasma…Federico D. Halpern Tess N. Bernard, Oleksandr Koshkarov, Ronald E. Waltz·Sep 4, 2026·Top 19%SaveLearn
A Minimal Self-Consistent Model for the Nonlinear Dynamics of Asymmetric Capacitively Coupled Radio-Frequency PlasmasWe develop a minimal self-consistent lumped-element model for the nonlinear radio-frequency dynamics of geometrically asymmetric capacitively coupled plasmas. The fast electrical response is…Thomas Mussenbrock·Sep 4, 2026·Top 89%SaveLearn