Flat-top plasma operational space of the STEP power plantSTEP is a spherical tokamak prototype power plant that is being designed to demonstrate net electric power. The design phase involves the exploitation of plasma models to optimise fusion performance…E. Tholerus, F. J. Casson, S. P. Marsden et al.·Mar 14, 2024SaveLearn
Stable high-transformer ratio beam-wakefield acceleration in cusp plasma channelsWakefield excitation by structured electron bunches in hollow gaps between plasma wedges is studied using three-dimensional particle-in-cell simulations. The main part of the electron bunch has a…Alexander Pukhov, Lars Reichwein·Mar 14, 2024SaveLearn
Effects of wave damping and finite perpendicular scale on three-dimensional Alfven wave parametric decay in low-beta plasmasShear Alfven wave parametric decay instability (PDI) provides a potential path toward significant wave dissipation and plasma heating. However, fundamental questions regarding how PDI is excited in a…Feiyu Li, Xiangrong Fu, Seth Dorfman·Mar 13, 2024SaveLearn
Ab initio Density Response and Local Field Factor of Warm Dense HydrogenWe present quasi-exact ab initio path integral Monte Carlo (PIMC) results for the partial static density responses and local field factors of hydrogen in the warm dense matter regime, from solid…Tobias Dornheim, Sebastian Schwalbe, Panagiotis Tolias et al.·Mar 13, 2024SaveLearn
An asymptotic Grad-Shafranov equation for quasisymmetric stellaratorsA first-order model is derived for quasisymmetric stellarators where the vacuum field due to coils is dominant, but plasma-current-induced terms are not negligible and can contribute to magnetic…Nikita Nikulsin, Wrick Sengupta, Rogerio Jorge et al.·Mar 12, 2024SaveLearn
Novel Signatures of Radiation Reaction in Electron-Laser SidescatteringIn this article we investigate novel signatures of radiation reaction via the angular deflection of an electron beam colliding at 90 degrees with an intense laser pulse. Due to the radiation reaction…Philipp Sikorski, Alec G. R. Thomas, Stepan S. Bulanov et al.·Mar 12, 2024SaveLearn
Ion Kinetics and Neutron Generation Associated with Electromagnetic Turbulence in Laboratory-scale Counter-streaming PlasmasElectromagnetic turbulence and ion kinetics in counter-streaming plasmas hold great significance in laboratory astrophysics, such as turbulence field amplification and particle energization. Here, we…P. Liu, D. Wu, T. X. Hu et al.·Mar 12, 2024SaveLearn
Single-Switch Transformer-less Power Supply for Low Temperature Plasma Jet -- 3.3 kV SiC MOSFET opportunitiesThis work presents a simple power converter, without any high voltage transformer, able to supply and control a plasma jet based on dielectric barrier discharge. The converter, operating in pulsed…David Florez, Hubert Piquet, Eric Bru et al.·Mar 12, 2024SaveLearn
Data-driven sparse modeling of oscillations in plasma space propulsionAn algorithm to obtain data-driven models of oscillatory phenomena in plasma space propulsion systems is presented, based on sparse regression (SINDy) and Pareto front analysis. The algorithm can…B. Bayón-Buján, M. Merino·Mar 11, 2024SaveLearn
Beam-driven Electron Cyclotron Harmonic and Electron Acoustic Waves as Seen in Particle-In-Cell SimulationsRecent study has demonstrated that electron cyclotron harmonic (ECH) waves can be excited by a low energy electron beam. Such waves propagate at moderately oblique wave normal angles (~70). The…Xu Zhang, Xin An, Vassilis Angelopoulos et al.·Mar 8, 2024SaveLearn
Validation of hydrodynamic and kinetic simulations with a plasma interpenetration ICF hohlraum experimentWe report on simulations of counter-propagating laser-produced plasmas in an inertial confinement fusion (ICF) hohlraum surrogate, aiming to replicate observations reported by Le Pape et. al in…Steven E. Anderson, Luis Chacón, Andrei N. Simakov et al.·Mar 8, 2024SaveLearn
Absorption of electromagnetic waves at oblique resonance in plasmas threaded by inhomogenous magnetic fieldsThere has been significant interest lately in the study of Electromagnetic (EM) waves interacting with magnetized plasmas. The variety of resonances and the existence of several pass and stop bands…Trishul Dhalia, Rohit Juneja, Amita Das·Mar 7, 2024SaveLearn
A physics-constrained deep learning surrogate model of the runaway electron avalanche growth rateA surrogate model of the runaway electron avalanche growth rate in a magnetic fusion plasma is developed. This is accomplished by employing a physics-informed neural network (PINN) to learn the…Jonathan S. Arnaud, Tyler Mark, Christopher J. McDevitt·Mar 7, 2024SaveLearn
Expanding CGL: The CGL double-adiabatic approximation in the Expanding Solar WindDifferent in situ satellite observations within 0.3 to 1 AU from the Sun reveal deviations in the thermodynamics of solar wind expansion. Specifically, these deviations challenge the applicability of…Sebastián Echeverría-Veas, Pablo S. Moya, Marian Lazar et al.·Mar 6, 2024SaveLearn
Synthesis and Structural Analysis of Multilayered Graphene via Microwave Atmospheric Pressure PlasmaThis study reports the successful synthesis of multilayered graphene sheets via microwave atmospheric pressure plasma. This innovative approach streamlines and expedites graphene production and other…Waqas Iqbal, Najeeb-ur-Rehman, Niaz Wali·Mar 6, 2024SaveLearn
Operational Space and Plasma Performance with an RMP-ELM Suppressed EdgeThe operational space and global performance of plasmas with edge-localized modes (ELMs) suppressed by resonant magnetic perturbations (RMPs) are surveyed by comparing AUG, DIII-D, EAST, and KSTAR…C. Paz-Soldan, S. Gu, N. Leuthold et al.·Mar 6, 2024SaveLearn
A reduced kinetic method for investigating non-local ion heat transport in ideal multi-species plasmasA reduced kinetic method (RKM) with a first-principle collision operator is introduced in a 1D2V planar geometry and implemented in a computationally inexpensive code to investigate non-local ion…Nicholas Mitchell, David Chapman, Christopher McDevitt et al.·Mar 6, 2024SaveLearn
Characterization of admissible quasisymmetriesWe solve "half" the problem of finding three-dimensional quasisymmetric magnetic fields that do not necessarily satisfy force balance. This involves determining which hidden symmetries are…J. W. Burby, N. Kallinikos, R. S. MacKay et al.·Mar 5, 2024SaveLearn
Ultrahigh Resolution X-ray Thomson Scattering Measurements at the European XFELUsing a novel ultrahigh resolution (ΔE 0.1\,eV) setup to measure electronic features in x-ray Thomson scattering (XRTS) experiments at the European XFEL in Germany, we have studied the…Thomas Gawne, Zhandos A. Moldabekov, Oliver S. Humphries et al.·Mar 5, 2024SaveLearn
Bright coherent attosecond X-ray pulses from beam-driven relativistic mirrorsBright ultrashort X-ray pulses allow scientists to observe ultrafast motion of atoms and molecules. Coherent light sources, such as the X-ray free electron laser (XFEL), enable remarkable discoveries…Marcel Lamač, Petr Valenta, Jaroslav Nejdl et al.·Mar 5, 2024SaveLearn
Canonical Hamiltonian Guiding Center Dynamics and Its Intrinsic Magnetic MomentThe concept of guiding center is potent in astrophysics, space plasmas, fusion researches, and arc plasmas to solve the multi-scale dynamics of magnetized plasmas. In this letter, we rigorously prove…Ruili Zhang, Jian Liu, Tong Liu et al.·Mar 5, 2024SaveLearn
Radiation and Heat Transport in Divergent Shock-Bubble InteractionsShock-bubble interactions (SBI) are important across a wide range of physical systems. In inertial confinement fusion, interactions between laser-driven shocks and micro-voids in both ablators and…Kelin Kurzer-Ogul, Brian M. Haines, David S. Montgomery et al.·Mar 5, 2024SaveLearn
Density jump for oblique collisionless shocks in pair plasmas: physical solutionsCollisionless shocks are frequently analyzed using the magnetohydrodynamics (MHD) formalism, even though MHD assumes a small mean free path. Yet, isotropy of pressure, fruit of binary collisions and…Antoine Bret, Colby C. Haggerty, Ramesh Narayan·Mar 4, 2024SaveLearn
Application of Neural Ordinary Differential Equations for Tokamak Plasma Dynamics AnalysisIn the quest for controlled thermonuclear fusion, tokamaks present complex challenges in understanding burning plasma dynamics. This study introduces a multi-region multi-timescale transport model,…Zefang Liu, Weston M. Stacey·Mar 3, 2024SaveLearn
Data-driven local operator finding for reduced-order modelling of plasma systems: II. Application to parametric dynamicsReal-world systems often exhibit dynamics influenced by various parameters, either inherent or externally controllable, necessitating models capable of reliably capturing these parametric behaviors.…Farbod Faraji, Maryam Reza, Aaron Knoll et al.·Mar 3, 2024SaveLearn