Off-axis runaway-electron seed formation, growth and suppressionNovel x-ray detection technology enabled the first profile measurements of the birth and growth dynamics of runaway electrons (REs) at the edge of tokamaks during quiescent RE studies at the Madison…L. F. Delgado-Aparicio, D. Del-Castillo-Negrete, N. C. Hurst et al.·Apr 11, 2022SaveLearn
Chaotic Excitations of Rogue Waves in Stable Parametric Region for Highly-Energetic Pair PlasmasWe have studied the Rogue wave existence and propagation in Ion-acoustic mode for the highly energetic case using kappa distributed electrons in accordance with the Korteweg de Vries equation that is…Suman Dey, Debjit Maity, Ananya Ghosh et al.·Apr 10, 2022SaveLearn
Spectra of magnetic turbulence in a relativistic plasmaWe present a phenomenological and numerical study of strong Alfvénic turbulence in a magnetically dominated collisionless relativistic plasma with a strong background magnetic field. In contrast with…Cristian Vega, Stanislav Boldyrev, Vadim Roytershteyn·Apr 9, 2022SaveLearn
New insights on divertor parallel flows, ExB drifts, and fluctuations from in situ, two-dimensional probe measurement in the Tokamak à Configuration VariableIn-situ, two-dimensional (2D) Langmuir probe measurements across a large part of the TCV divertor are reported in L-mode discharges with and without divertor baffles. This provides detailed insights…H. De Oliveira, C. Theiler, O. Février et al.·Apr 9, 2022SaveLearn
Mapping the self-generated magnetic fields due to thermal Weibel instabilityWeibel-type instability can self-generate and amplify magnetic fields in both space and laboratory plasmas with temperature anisotropy. The electron Weibel instability has generally proven more…Chaojie Zhang, Yipeng Wu, Mitchell Sinclair et al.·Apr 8, 2022SaveLearn
Electron Weibel instability induced magnetic fields in optical-field ionized plasmasGeneration and amplification of magnetic fields in plasmas is a long-standing topic that is of great interest to both plasma and space physics. The electron Weibel instability is a well-known…Chaojie Zhang, Yipeng Wu, Mitchell Sinclair et al.·Apr 8, 2022SaveLearn
Durable and Recoverable Hydrophilicity of Polyethylene Terephthalate Fabric Prepared with Plasma Selective EtchingDurable delustered PET (PET-TiO2) fabrics super hydrophilic surface has been obtained by plasma selecting etching. The aging effect of their hydrophilicity after plasma treatment has been…Tarig T. A. Owad, Eshraga A. A. Siddig, Renad E. M. Salih et al.·Apr 8, 2022SaveLearn
Towards Bright Gamma-Ray Flash Generation From Tailored Target Irradiated by Multi-Petawatt LaserOne of the remarkable phenomena in the laser-matter interaction is the extremely efficient energy transfer to γ-photons, that appears as a collimated γ-ray beam. For interactions of realistic…Prokopis Hadjisolomou, Tae Moon Jeong, Sergei V. Bulanov·Apr 7, 2022SaveLearn
Systematic investigation of critical charge limits in Thick GEMsWe present discharge probability studies performed with a single Thick Gas Electron Multiplier (THGEM) irradiated with alpha particles in Ar-CO2 and Ne-CO2 mixtures. We observe a clear…P. Gasik, L. Lautner, L. Fabbietti et al.·Apr 6, 2022SaveLearn
A computational study of accelerating, steady and fading negative streamers in ambient airWe study negative streamers in ambient air using a 2D axisymmetric fluid model. Depending on the background electric field, we observe accelerating, steady and fading negative streamers. Fading…Baohong Guo, Xiaoran Li, Ute Ebert et al.·Apr 6, 2022SaveLearn
First-principles density limit scaling in tokamaks based on edge turbulent transport and implications for ITERA first-principles scaling law, based on turbulent transport considerations, and a multi-machine database of density limit discharges from the ASDEX Upgrade, JET and TCV tokamaks, show that the…M. Giacomin, A. Pau, P. Ricci et al.·Apr 6, 2022SaveLearn
Electron Modulational Instability in the Strong Turbulent Regime for an Electron Beam Propagating in Background PlasmaWe study collective processes for an electron beam propagating through a background plasma using simulations and analytical theory. A new regime where the instability of a Langmuir wave packet can…Haomin Sun, Jian Chen, Igor D. Kaganovich et al.·Apr 5, 2022SaveLearn
Physical Regimes of Electrostatic Wave-Wave nonlinear interactions generated by an Electron Beam Propagating in a Background PlasmaElectron-beam plasma interaction has long been a topic of great interest. Despite the success of Quasi-Linear (QL) theory and Weak Turbulence (WT) theory, their validities are limited by the…Haomin Sun, Jian Chen, Igor D. Kaganovich et al.·Apr 5, 2022SaveLearn
Spectroscopic investigations of detachment on the MAST Upgrade Super-X divertorWe present the first analysis of the atomic and molecular processes at play during detachment in the MAST-U Super-X divertor using divertor spectroscopy data. Our analysis indicates detachment in the…Kevin Verhaegh, Bruce Lipschultz, James Harrison et al.·Apr 5, 2022SaveLearn
First Identification of New X-Ray Spectra of Mo39+, Mo40+, W43+, W44+ and W45+ on EASTNew high-resolution x-ray spectra of Mo39+, Mo40+, W43+, W44+ and W45+ have been carefully confirmed for the first time by use of the x-ray imaging crystal spectrometer (XCS) in Experimental Advanced…Fudi Wang, Dian Lu, Mingfeng Gu et al.·Apr 5, 2022SaveLearn
Hybrid codes (massless electron fluid)Hybrid codes are widely used to model ion-scale phenomena in space plasmas. Hybrid codes differ from full particle (PIC) codes in that the electrons are modeled as a fluid that is usually assumed to…D. Winske, Homa Karimabadi, Ari Le et al.·Apr 4, 2022SaveLearn
Implementation of AI/Deep Learning Disruption Predictor into a Plasma Control SystemThis paper reports on advances to the state-of-the-art deep-learning disruption prediction models based on the Fusion Recurrent Neural Network (FRNN) originally introduced a 2019 Nature publication.…William Tang, Ge Dong, Jayson Barr et al.·Apr 4, 2022SaveLearn
Electron Temperature Relaxation in the Clusterized Ultracold PlasmasUltracold plasmas are a promising candidate for the creation of strongly-coupled Coulomb systems. Unfortunately, the values of the coupling parameter Gammae actually achieved after photoionization…Yurii V. Dumin, Anastasiia T. Lukashenko·Apr 2, 2022SaveLearn
Comments to "A non-thermal laser-driven mixed fuel nuclear fusion reactor concept" by H. Ruhl and G. Korn (Marvel Fusion, Munich)The declared aim of Marvel Fusion is the realization of a reactor based on the aneutronic fusion of proton and boron-11 nuclei in the near future, making use of latest-day laser technology and…Karl Lackner·Apr 1, 2022SaveLearn
Low Frequency Oscillations of Plasma Injected in Open Magnetic Trap from Independent Ultra-high Frequency SourceMethods of plasma heating by electromagnetic waves, interaction of electro-magnetic waves with magnetoactive plasma, plasma turbulence and transport processes are investigated in the trap of the…S. I. Nanobashvili, Z. R. Beria, G. V. Gelashvili et al.·Apr 1, 2022SaveLearn
Quantum dot on a plasma-facing microparticle surface: Thermal balanceSemiconductor nanocrystals, quantum dots, are known to exhibit the quantum-confined Stark effect which reveals itself in the shift of their photoluminescence spectra in response to external electric…Mikhail Pustylnik·Apr 1, 2022SaveLearn
The DESC Stellarator Code Suite Part III: Quasi-symmetry optimizationThe DESC stellarator optimization code takes advantage of advanced numerical methods to search the full parameter space much faster than conventional tools. Only a single equilibrium solution is…Daniel Dudt, Rory Conlin, Dario Panici et al.·Mar 31, 2022SaveLearn
The DESC Stellarator Code Suite Part I: Quick and accurate equilibria computations3D equilibrium codes are vital for stellarator design and operation, and high-accuracy equilibria are also necessary for stability studies. This paper details comparisons of two three-dimensional…Dario Panici, Rory Conlin, Daniel W. Dudt et al.·Mar 31, 2022SaveLearn
Observing Particle Energization above the Nyquist Frequency: An Application of the Field-Particle Correlation TechniqueThe field-particle correlation technique utilizes single-point measurements to uncover signatures of various particle energization mechanisms in turbulent space plasmas. The signature of Landau…Sarah A. Horvath, Gregory G. Howes, Andrew J. McCubbin·Mar 31, 2022SaveLearn
Effect of external magnetic field and dust grains on the properties of Ion Acoustic WavesAn experimental study to investigate the effect of an external magnetic field on the propagation of ion-acoustic waves (IAWs) has been carried out in hydrogen plasma containing two-temperature…K. Deka, R. Paul, G. Sharma et al.·Mar 31, 2022SaveLearn