Underlying Physical Mechanisms in Upward Positive FlashesThis study presents the first observation of a mixed mode of charge transfer during an upward positive flash, which was initiated from the Säntis Tower in Switzerland. High-speed camera footage,…Toma Oregel-Chaumont, Antonio Šunjerga, Jérôme Kasparian et al.·Jan 14, 2025SaveLearn
Healing of the edge magnetic island in the island divertor configuration on J-TEXTThe phenomena of island healing and configuration transition induced by high-power electron cyclotron resonance heating (ECRH) have been investigated in the island divertor configuration on the…Zhangrong Hou, Song Zhou, Nengchao Wang et al.·Jan 14, 2025SaveLearn
Degeneracy and metallic character in free and confined weakly coupled plasmas: with and without electric fieldIncidental degeneracy and metallic character is probed for weakly coupled plasmas in free and confined environments. The generality of incidental degeneracy in quantum mechanical systems is discussed…Neetik Mukherjee, Amlan K. Roy·Jan 13, 2025SaveLearn
Particle-In-Cell Simulations of Quantum PlasmasRoom-temperature metals and semi-metals which consist of a gas of bound electrons in a near-continuum band structure can be classified as cold quantum plasmas. This insight suggests that…Gregory K. Ngirmang, Hue T. B. Do, Guangxin Liu et al.·Jan 13, 2025SaveLearn
Interaction of upper hybrid waves with dust-ion-magnetoacoustic waves and stable two-dimensional solitons in dusty plasmasWe obtain a two-dimensional nonlinear system of equations for the electrostatic potential envelope and the low-frequency magnetic field perturbation to describe the interaction of the upper hybrid…Volodymyr M. Lashkin, Oleg K. Cheremnykh·Jan 13, 2025SaveLearn
Conefield approach to identifying regions without flux surfaces for magnetic fieldsThe conefield variant of a Converse KAM method for 3D vector fields, identifying regions through which no invariant 2-tori pass transverse to a specified direction field, is tested on some helical…David Martinez-del-Rio, Robert S. MacKay·Jan 12, 2025SaveLearn
Detecting Linear Breit-Wheeler Signals with a Laser-Foil SetupAs a fundamental QED process, linear Breit-Wheeler (LBW) pair production predicted 90 years ago has not yet been demonstrated in experiments with real photons. Here, we propose an experimentally…Huai-Hang Song, Wei-Min Wang, Yu-Tong Li et al.·Jan 12, 2025SaveLearn
Efficient Framework for Solving Plasma Waves with Arbitrary DistributionsPlasma, which constitutes 99\% of the visible matter in the universe, is characterized by a wide range of waves and instabilities that play a pivotal role in space physics, astrophysics, laser-plasma…Huasheng Xie·Jan 11, 2025SaveLearn
Bayesian optimization of electron energy from laser wakefield acceleratorsWe use Bayesian optimization in combination with three-dimensional particle-in-cell simulations to determine the optimal laser and plasma parameters that, for a given laser pulse energy, maximize the…P. Valenta, T. Zh. Esirkepov, J. D. Ludwig et al.·Jan 10, 2025SaveLearn
Memory time fluctuations and instabilities in random mediaThe role of memory time fluctuations for instabilities in random media is considered. It is shown that fluctuations can result in infinitely fast growth of statistical moments. The effect is…S. Pavlenko, E. Illarionov, D. Sokoloff·Jan 10, 2025SaveLearn
Self-consistent full MHD coupling of JOREK and STARWALL for advanced plasma free boundary simulationAn adequate modelling of the electromagnetic interaction of the plasma with the surrounding conductors is paramount for the correct reproduction of 3D plasma dynamics. Simulations of the latter…Raffaele Sparago, Francisco Javier Artola, Matthias Hoelzl·Jan 10, 2025SaveLearn
Formation of Anomalously Energetic Ions in Hollow Cathode Plume by Charge Separation InstabilityHollow cathodes are becoming the bottleneck of many electric propulsion systems, because of the sputtering and erosion on both cathodes and thrusters from the generation of anomalously energetic…Yinjian Zhao, Baisheng Wang, Tianhang Meng·Jan 10, 2025SaveLearn
Data-driven methods to discover stable linear models of the helicity injectors on HIT-SIUAccurate and efficient circuit models are necessary to control the power electronic circuits found on plasma physics experiments. Tuning and controlling the behavior of these circuits is inextricably…Zachary L. Daniel, Alan A. Kaptanoglu, Christopher J. Hansen et al.·Jan 9, 2025SaveLearn
SF6 streamer breakdown induced by floating linear metal particles: Following streamers and side streamersThe electrical breakdown of SF6 in the presence of floating metal particles is facilitated by two key factors: the role of floating metal particles and the nonlinear breakdown behavior of…Zihao Feng, Liyang Zhang, Xinxin Wang et al.·Jan 9, 2025SaveLearn
Fast physics-based launcher optimization for electron cyclotron current driveWith the increased urgency to design fusion pilot plants, fast optimization of electron cyclotron current drive (ECCD) launchers is paramount. Traditionally, this is done by coarsely sampling the 4-D…N A Lopez, A Alieva, S A M McNamara et al.·Jan 8, 2025SaveLearn
Coil geometry with large openings for a HSR3-like stellarator reactor for fast replacement of in-vessel componentsAdvanced stellarators require convoluted modular coils to produce a plasma with satisfactory performance. Moreover, the number of coils is sometimes high to decrease the modular ripple created by the…V. Queral, V. Tribaldos, J. M. Reynolds et al.·Jan 8, 2025SaveLearn
A multi-purpose reciprocating probe drive system for studying the effect of gas-puffs on edge plasma dynamics in the ADITYA-U tokamakThis article reports the development of a versatile high-speed reciprocating drive system (HRDS) with interchangeable probe heads to characterize the edge plasma region of ADITYA-U tokamak. This…Kaushlender Singh, Bharat Hegde, Ashok K. Kumawat et al.·Jan 8, 2025SaveLearn
Observations of Turbulence and Particle Transport at Interplanetary Shocks: Transition of Transport RegimesThe transport of energetic particles is intimately related to the properties of plasma turbulence, a ubiquitous dynamic process that transfers energy across a broad range of spatial and temporal…Siqi Zhao, Huirong Yan, Terry Z. Liu·Jan 7, 2025SaveLearn
Shapiro Steps Observed in a Two-Dimensional Yukawa Solid Modulated by a One-Dimensional Vibrational Periodic SubstrateDepinning dynamics of a two-dimensional (2D) solid dusty plasma modulated by a one-dimensional (1D) vibrational periodic substrate are investigated using Langevin dynamical simulations. As the…Zhaoye Wang, Nichen Yu, C. Reichhardt et al.·Jan 7, 2025SaveLearn
Hybrid simulations of FRC merging and compressionAn improved understanding of Field Reversed Configuration (FRC) merging and stability in high acceleration and compression magnetic fields is needed to speed up the development of the pulsed fusion…E. V. Belova, S. E. Clark, R. Milroy et al.·Jan 6, 2025SaveLearn
Model expressions for refractive indices of electron waves in cold magnetoactive plasmaDespite the undoubted importance of having fairly simple analytical expressions for the refractive indices of wave modes in a magnetoactive plasma, such expressions are known only in some particular…D. R. Shklyar, N. S. Artekha·Jan 6, 2025SaveLearn
Geometric curvature effect on suppressing the Ion-Temperature-Gradient mode near the magnetic axisGlobal gyrokinetic simulation of the ion temperature gradient mode shows that the radial electric field (Er) well upshifts the critical temperature gradient near the magnetic axis, in the weak but…Tiannan Wu, Shaojie Wang·Jan 6, 2025SaveLearn
Stabilization of sawteeth instability by short gas pulse injection in ADITYA-U tokamakExperiments on ADITYA-U tokamak show a marked enhancement in the sawtooth period by application of short gas puffs of fuel that cause a modification of the radial density profile. A consequent…Suman Dolui, Kaushlender Singh, Bharat Hegde et al.·Jan 3, 2025SaveLearn
Three-dimensional Helical-rotating Plasma Structures in Beam-generated Partially Magnetized PlasmasAzimuthal structures emerging in beam-generated partially magnetized plasmas are investigated using three-dimensional particle-in-cell/Monte Carlo collision simulations. Two distinct instability…Jian Chen, Andrew T. Powis, Igor D. Kaganovich et al.·Jan 2, 2025SaveLearn
Frequency modulation of THz emission from a laser filament arrayA simple traveling wave antenna model is used to theoretically study emission from an array of filaments. Both transverse and longitudinal arrays of filaments are considered. The angular distribution…Sean D. McGuire, Mikhail N. Shneider·Jan 2, 2025SaveLearn