Runaway electrons during a coil quench in stellaratorsIt is shown that avalanches of runaway electrons can arise in stellarators, even if there is no net toroidal current in the plasma or the magnetic-field coils, if the current in the latter varies…Pavel Aleynikov, Per Helander, Håkan M Smith·Sep 19, 2025SaveLearn
Exponential Spectral Scaling: Robust and Efficient Stellarator Boundary Optimization via Mode-Dependent ScalingStellarator boundary optimization faces a fundamental numerical challenge: the extreme disparity between low- and high-mode amplitudes creates an optimization landscape in which direct full-spectrum…Byoungchan Jang, Rory Conlin, Matt Landreman·Sep 19, 2025SaveLearn
A novel agile THz Pulsed Spectropolarimeter measuring 2D distributions of the magnetic field, density and ion temperature of fusion reactor equilibriaWith the recent inception of intense pulsed THz sources via optical rectification using crystalline lithium niobate, non-perturbative measurements of the internal local magnetic field are now…Roger J Smith·Sep 19, 2025SaveLearn
On the enhanced Balmer emission of hydrogen in helium Capacitively Coupled Radio Frequency (CCRF) plasmaThe present study investigates the observation and enhancement in the intensity of the hydrogen Balmer series emission in a He CCRF plasma using optical emission spectroscopy (OES). In addition to…Varsha S, Prabhakar Srivastav, Yukti Goel et al.·Sep 19, 2025SaveLearn
Modeling of runaway electron induced damage on boron-nitride tiles in WESTThe runaway electron (RE) - induced damage on boron nitride (BN) tiles mounted on the inner bumpers of the WEST tokamak is modeled employing available empirical input and experimental constraints,…Tommaso Rizzi, Svetlana Ratynskaia, Panagiotis Tolias et al.·Sep 19, 2025SaveLearn
Structure-preserving long-time simulations of turbulence in magnetized ideal fluidsWe address three two-dimensional magnetohydrodynamics models: reduced magnetohydrodynamics (RMHD), Hazeltine's model, and the Charney--Hasegawa--Mima (CHM) equation. These models are derived to…Klas Modin, Michael Roop·Sep 18, 2025SaveLearn
The hot-electron closure of the moment-based gyrokinetic plasma modelWe derive the hot-electron-limit (HEL) closure for the moment hierarchy used to solve the gyrokinetic equations, known as the gyromoment (GM) approach. By expanding the gyroaveraging kernels in the…A. C. D. Hoffmann, P. Giroud-Garampon, P. Ricci·Sep 18, 2025SaveLearn
Electron Inertia and Magnetic ReconnectionWhen electron inertia is the only non-ideal effect in the evolution of a magnetic field B, the field lines of B reconnect, but the lines of a related field B do not.…Allen H Boozer·Sep 17, 2025SaveLearn
Runaway electron interactions with whistler waves in tokamak plasmas: energy-dependent transport scalingResonant interactions between high energy runaway electrons (REs) and whistler waves are a promising mechanism for RE mitigation in tokamak plasmas. While prior studies have largely relied on…Yashika Ghai, D. Del-Castillo-Negrete, D. A. Spong et al.·Sep 16, 2025SaveLearn
FusionMAE: large-scale pretrained model to optimize and simplify diagnostic and control of fusion plasmaIn magnetically confined fusion device, the complex, multiscale, and nonlinear dynamics of plasmas necessitate the integration of extensive diagnostic systems to effectively monitor and control…Zongyu Yang, Zhenghao Yang, Wenjing Tian et al.·Sep 16, 2025SaveLearn
Validation of the GFS model for Gyrokinetic Stability of NSTX Pedestal DataThis study presents a large database validation of the Gyro Fluid System (GFS) model for linear gyrokinetic stability for high-mode (H-mode) edge transport barrier conditions in the National…M. Yang, J. F. Parisi, M. S. Anastopoulos Tzanis et al.·Sep 16, 2025SaveLearn
Laboratory measurements of energy partitioning and anomalous electron heating in magnetized, perpendicular collisionless shocksWe present laboratory results on energy partitioning from supercritical, magnetized collisionless shock experiments (MA 8, Mms 4). We report the first observation of…V. Valenzuela-Villaseca, S. Totorica, J. Griff-McMahon et al.·Sep 15, 2025SaveLearn
Helical Core Formation and MHD Stability in ITER-Scale Plasmas with Fusion-born Alpha ParticlesThe effect of fusion-born alpha particles on the helical core (HC), a long-lived ideal saturation state of the m/n=1/1 kink/quasi-interchange mode, is studied in the ITER-scale hybrid scenario…P. Adulsiriswad, A. Bierwage, M. Yagi·Sep 15, 2025SaveLearn
The impact of kinetic and global effects on ballooning 2nd stable pedestals of conventional and low aspect ratio tokamaksThe EPED model [P.B. Snyder et al 2011 Nucl. Fusion 51 103016] had success describing the pedestals of the Type-I ELM and QH-mode operations in conventional tokamaks, by combining kinetic ballooning…M. S. Anastopoulos Tzanis, M. Yang, A. Kleiner et al.·Sep 15, 2025SaveLearn
A Wendelstein-7X Profile Database for Informed Transport StudiesTo advance the development of future fusion devices beyond Wendelstein 7-X (W7-X), a robust understanding of energy confinement time scaling is crucial. Universal temperature and density profile…Jan Ricken·Sep 15, 2025SaveLearn
Shock wave bending around a dusty plasma voidWe report on experimental observations of the bending of a dust acoustic shock wave around a dust void region. This phenomenon occurs as a planar shock wavefront encounters a compressible obstacle in…Sachin Sharma, Rauoof Wani, Prabhakar Srivastav et al.·Sep 15, 2025SaveLearn
A high-performance elliptic solver for plasma boundary turbulence codesElliptic equations play a crucial role in turbulence models for magnetic confinement fusion. Regardless of the chosen modeling approach - whether gyrokinetic, gyrofluid, or drift-fluid - the Poisson…Andreas Stegmeir, Cristian Lalescu, Mou Lin et al.·Sep 15, 2025SaveLearn
Reconstructing High-fidelity Plasma Turbulence with Data-driven Tuning of Diffusion in Low Resolution GridsDeveloping physically consistent closure models is a longstanding challenge in simulating plasma turbulence, even in minimal systems such as the two-field Hasegawa-Wakatani (HW) model, which captures…Kunpeng Li, Youngwoo Cho, Xavier Garbet et al.·Sep 15, 2025SaveLearn
Glow discharge induced reactions in mixtures of ozone and chlorodifluoromethane with atmospheric gasesThe influence of extraterrestrial particles like cosmic radiation (CR) on the chemistry and ozone density in the Earth stratosphere is not well investigated and normally neglected in stratospheric…Alexander Dorn, Haydar Mutaf, Recep Orhan et al.·Sep 14, 2025SaveLearn
On the Poisson brackets of hybrid plasma models with kinetic ions and massless electronsWe investigate the conditions under which the Jacobi identity holds for a class of recently introduced anti-symmetric brackets for the hybrid plasma models with kinetic ions and massless electrons.…Yingzhe Li, Philip J. Morrison, Stefan Possanner et al.·Sep 14, 2025SaveLearn
Dynamical generation of macroscale magnetic fields and fast flows in a four-component astrophysical plasmaWe explore the possibility of the generation or amplification of macroscale magnetic fields and flows in a four-component astrophysical dusty plasma composed of mobile massless electrons and…Usman Shazad, M. Iqbal·Sep 14, 2025SaveLearn
Energetic spectra from semi-implicit particle-in-cell simulations of magnetic reconnectionAstrophysical observations suggest that magnetic reconnection in relativistic plasmas plays an important role in the acceleration of energetic particles. Modeling this accurately requires numerical…K. M. Schoeffler, F. Bacchini, K. Kormann et al.·Sep 14, 2025SaveLearn
A Momentum-Resolved X-ray Thomson Scattering Benchmark of Electronic-Response Models in Warm Dense AluminiumThe robust diagnosis of conditions generated in warm dense matter (WDM) experiments remains a persistent challenge. Here we describe the measurement of shock-compressed aluminium at 50 GPa with…Dmitrii S. Bespalov, Ulf Zastrau, Zhandos A. Moldabekov et al.·Sep 12, 2025SaveLearn
The universal growth of magnetic energy during the nonlinear phase of subsonic and supersonic small-scale dynamosSmall-scale dynamos (SSDs) amplify magnetic fields in turbulent plasmas. Theory predicts nonlinear magnetic energy growth Emag tpnl, but this scaling has not been…Neco Kriel, James R. Beattie, Mark R. Krumholz et al.·Sep 12, 2025SaveLearn
Power coupled to the slow wave resonance cone in cold plasmaWe consider the power coupled to the plasma from a cylindrical source emitting resonance cones, propagative slow waves which exist in low density magnetized plasmas when the signs of the Stix…Wouter Tierens·Sep 12, 2025SaveLearn