Turbulence and Transport in Spectrally Accelerated full-f Gyrokinetic SimulationsWe investigate edge and scrape-off layer (SOL) turbulence and transport using the spectrally accelerated full-f gyrokinetic (GK) code GENE-X, recently introduced in [B. J. Frei et al.,…B. J. Frei, P. Ulbl, C. Pitzal et al.·May 7, 2025SaveLearn
Neural-network-based longitudinal electric field prediction in nonlinear plasma wakefield acceleratorsPlasma wakefield acceleration holds remarkable promise for future advanced accelerators. The design and optimization of plasma-based accelerators typically require particle-in-cell simulations, which…Xiaoning Wang, Ming Zeng, Dazhang Li et al.·May 7, 2025SaveLearn
Impact of Radio Frequency Power on Columnar and Filamentary Modes in Atmospheric Pressure Very Low Frequency Plasma within PoresThe impact of radio frequency (RF) power on columnar and filamentary modes of very low frequency (VLF) plasma within pores is investigated in this work. The 12.5 kHz VLF discharge under various RF…Haozhe Wang, Yu Zhang, Jie Cui et al.·May 7, 2025SaveLearn
A comparison of low-n Mercier unstable Wendelstein stellarators and quasi-interchange modes in tokamaksMercier's criterion is typically enforced as a hard operational limit in stellarator design. At the same time, past experimental and numerical studies have shown that this limit may often be…Rohan Ramasamy, Haowei Zhang, Joachim Geiger et al.·May 6, 2025SaveLearn
Understanding large-scale dynamos in unstratified rotating shear flowsWe combine simulations with new analyses that overcome previous pitfalls to explicate how nonhelical mean-field dynamos grow and saturate in unstratified, magnetorotationally driven turbulence. Shear…Tushar Mondal, Pallavi Bhat, Fatima Ebrahimi et al.·May 6, 2025SaveLearn
High-order exponential solver method for particle-in-cell simulationsOutstanding advances in solid-state laser technology, employing the optical parametric chirped-pulse-amplification (OPCPA) technique, have led physicists to focus laser pulses to highly-relativistic…Szilárd Majorosi, Nasr Hafz, Zsolt Lécz·May 6, 2025SaveLearn
High-Harmonic Generation and Optical Torque Interaction via Relativistic Diffraction of a Spatiotemporal Vortex LightDiffraction of a relativistically-strong light can produce high-order harmonics via the relativistic oscillating window mechanism. In this process, the characteristics of the 2D electron dynamics at…Ke Hu, Xinju Guo, Longqing Yi·May 6, 2025SaveLearn
Anomalous Effects in Single-slit Diffraction of Light at Relativistic IntensitiesHigh-order harmonic generation via single-slit diffraction of relativistic laser pulses is investigated. Using fully kinetic 2D and 3D particle-in-cell simulations, we show that interesting optical…Longqing Yi·May 6, 2025SaveLearn
Assessing the Numerical Stability of Physics Models to Equilibrium Variation through Database ComparisonsHigh fidelity kinetic equilibria are crucial for tokamak modeling and analysis. Manual workflows for constructing kinetic equilibria are time consuming and subject to user error, motivating…A. Rothstein, V. Ailiani, K. Krogen et al.·May 6, 2025SaveLearn
Piecewise omnigenous stellarators with zero bootstrap currentUntil now, quasi-isodynamic magnetic fields have been the only known stellarator configurations that, at low collisionality, give small radial neoclassical transport and zero bootstrap current for…Ivan Calvo, Jose Luis Velasco, Per Helander et al.·May 5, 2025SaveLearn
Roadmap for warm dense matter physicsThis roadmap presents the state-of-the-art, current challenges and near future developments anticipated in the thriving field of warm dense matter physics. Originating from strongly coupled plasma…Jan Vorberger, Frank Graziani, David Riley et al.·May 5, 2025SaveLearn
Record Magnetic Field Generation by Short-Pulse Laser-Driven Capacitor-Coil TargetsMagnetic fields generated by capacitor-coil targets driven by intense short-pulse lasers have been characterized using ultrafast proton radiography. A 1-kJ, 15-ps laser at a center wavelength of 1053…Lan Gao, Yang Zhang, Hantao Ji et al.·May 5, 2025SaveLearn
Diagnosing electric and magnetic fields in laser-driven coil targetsLaser-driven capacitor coils are widely used to generate intense magnetic fields for various applications in high-energy-density physics research. Accurate measurement of the magnetic fields is…Yang Zhang, Lan Gao, Hantao Ji et al.·May 5, 2025SaveLearn
An Exact Turbulence Law For the Fluid Description of Fusion Edge PlasmasUnderstanding turbulence via simplified fluid models is crucial for optimizing magnetic confinement in tokamak devices. In this work, we propose a novel high-order turbulence law that describes the…Luisa Scarivaglione, Sergio Servidio·May 5, 2025SaveLearn
Prediction of ELM-free Operation in Spherical Tokamaks With High Plasma SquarenessWe predict that high plasma squareness in spherical tokamaks (STs) could result in edge-localized-mode (ELM)-free H-mode. The effect of squareness on gyrokinetic and peeling-ballooning-mode…J. F. Parisi, J. W. Berkery, K. Imada et al.·May 5, 2025SaveLearn
Evolution of the rippled inner-interface-initiated ablative Rayleigh-Taylor instability in laser-ablating high-Z doped targetsRippled interface between the ablator and DT ice can feedout and form the perturbation seeds for the ablative Rayleigh-Taylor (ART) instability, which negatively affects direct-drive inertial…W. Xiong, X. H. Yang, Z. H. Chen et al.·May 5, 2025SaveLearn
Increasing the density limit with ECRH-assisted Ohmic start-up on EASTHigh plasma density operation is crucial for a tokamak to achieve energy breakeven and a burning plasma. However, there is often an empirical upper limit of electron density in tokamak operation,…Jiaxing Liu, Ping Zhu, Dominique Franck Escande et al.·May 5, 2025SaveLearn
Experimental evidence of stimulated Raman re-scattering in laser-plasma interactionWe present the first experimental evidence of stimulated Raman re-scattering of a laser in plasma: The scattered light produced by the Raman instability is intense enough to scatter again through the…J. -R. Marquès, F. Pérez, P. Loiseau et al.·May 5, 2025SaveLearn
Near-axis measures of quasi-isodynamic configurationsWe present a number of measures and techniques to characterise and effectively construct quasi-isodynamic stellarators within the near-axis framework, without the need to resort to the computation of…Eduardo Rodriguez, Gabriel G Plunk·May 5, 2025SaveLearn
Capturing the three dimensional, nano-scale, pico-second dynamics of plasma mirrors with intense ultrashort laser wavefront measurementWe present a direct measurement of the nanoscale dynamics of plasma mirrors using wavefront measurement techniques. This two-dimensional measurement, performed via pump-probe diagnostics, enables the…Sk Rakeeb, Sagar Dam, Ameya Parab et al.·May 5, 2025SaveLearn
Continuing progress toward fusion energy breakeven and gain as measured against the Lawson criteriaThis paper is an update to our earlier paper ''Progress toward fusion energy breakeven and gain as measured against the Lawson criterion'' [Phys. Plasmas 29, 062103 (2022)]. Plots of…Samuel E. Wurzel, Scott C. Hsu·May 4, 2025SaveLearn
A Parallel-Kinetic-Perpendicular-Moment Model for Magnetized PlasmasWe describe a new model for the study of weakly-collisional, magnetized plasmas derived from exploiting the separation of the dynamics parallel and perpendicular to the magnetic field. This unique…James Juno, Ammar Hakim, Jason M. TenBarge·May 4, 2025SaveLearn
Electrospray Thruster Plume Dynamics: Insights from Precise PP Coulomb Field SimulationElectrospray thrusters are one important type of micropropulsion systems being developed for next-generation space missions, yet the primary challenge to their operational lifespan is propellant…Zhe Liu, Yinjian Zhao·May 4, 2025SaveLearn
Retrospective of the ARPA-E BETHE-GAMOW-Era Fusion Programs and Project CohortsThis paper provides a retrospective of the BETHE (Breakthroughs Enabling THermonuclear-fusion Energy) and GAMOW (Galvanizing Advances in Market-aligned fusion for an Overabundance of Watts) fusion…S. C. Hsu, M. C. Handley, S. E. Wurzel et al.·May 3, 2025SaveLearn
Collisionless ablative plasma shocksAn ablative plasma shock can emanate from the interface between a cold/dense plasma and a hot/dilute ambient plasma, where the plasma mean-free-path is much longer than the temperature gradient…Yanzeng Zhang, Xian-Zhu Tang·May 3, 2025SaveLearn