Energetic Particle Tracing in Optimized Quasisymmetric Stellarator EquilibriaRecent developments in the design of magnetic confinement fusion devices have allowed the construction of exceptionally optimized stellarator configurations. The near-axis expansion in particular has…P. A. Figueiredo, R. Jorge, J. Ferreira et al.·Nov 13, 2023SaveLearn
SOLPS-ITER simulation of an X-point radiator in TCVSOLPS-ITER simulation is performed to reproduce the X-point radiator recently observed in nitrogen-seeded TCV experiments, which is a scenario that may be favorable to solve the power exhaust…G. Sun, O. Pan, M. Bernert et al.·Nov 13, 2023SaveLearn
Investigating the influence of divertor baffles on nitrogen-seeded detachment in TCV with SOLPS-ITER simulations and TCV experimentsPlasma edge simulations with the SOLPS-ITER code are performed to study the influence of divertor baffles on nitrogen-seeded detachment in TCV single-null, L-mode discharges. Scans of nitrogen…G. Sun, H. Reimerdes, C. Theiler et al.·Nov 13, 2023SaveLearn
A new quasilinear model for turbulent momentum transport in tokamaks with flow shear and plasma shapingIn tokamak experiments, sufficiently strong E× B flow shear reduces turbulent transport, thereby improving the prospects for fusion power plants. It is therefore of great importance to…Haomin Sun, Justin Ball, Stephan Brunner et al.·Nov 13, 2023SaveLearn
TokaMaker: An open-source time-dependent Grad-Shafranov tool for the design and modeling of axisymmetric fusion devicesIn this paper, we present a new static and time-dependent MagnetoHydroDynamic (MHD) equilibrium code, TokaMaker, for axisymmetric configurations of magnetized plasmas, based on the well-known…C. Hansen, I. G. Stewart, D. Burgess et al.·Nov 13, 2023SaveLearn
Limiting Current on Periodic Electron Sheets in a Planar DiodeWe consider the steady state limiting current that can be carried by an infinite periodic array of thin electron sheets spaced by period p in a planar diode of gap voltage V and gap separation d. Our…David Chernin, Dion Li, Y. Y. Lau·Nov 13, 2023SaveLearn
Controlling intense, ultrashort, laser-driven relativistic mega-ampere electron fluxes by a modest, static magnetic fieldThe guiding and control of ultrahigh flux, femtosecond relativistic electron pulses through solid density matter is of great importance for many areas of high energy density science. Efforts so far…Anandam Choudhary, Trishul Dhalia, C. Aparajit et al.·Nov 12, 2023SaveLearn
Emergence of magnetic structure in supersonic isothermal magnetohydrodynamic turbulenceThe inverse transfer of magnetic helicity is a fundamental process which may explain large scale magnetic structure formation and sustainement. Until very recently, direct numerical simulations (DNS)…Jean-Mathieu Teissier, Wolf-Christian Müller·Nov 12, 2023SaveLearn
Fundamental Electron and Potential Relations in Dilute Plasma FlowsIn this short note, we present some work on investigating electron temperatures and potentials in steady or unsteady dilute plasma flows. The analysis is based on the detailed fluid model for…Shiying Cai, Chunpei Cai, Xin He·Nov 11, 2023SaveLearn
Peculiarities of charged particle kinetics in spherical plasmaWe describe kinetic simulations of transient problems in partially ionized weakly-collisional plasma around spherical bodies absorbing or emitting charged particles. Numerical solutions of kinetic…V I Kolobov, R R Arslanbekov, H Liang·Nov 11, 2023SaveLearn
Role of the edge electric field in the resonant mode-particle interactions and the formation of transport barriers in toroidal plasmasThe impact of an edge radial electric field on the particle orbits and the orbital spectrum in an axisymmetric toroidal magnetic equilibrium is investigated using a guiding center canonical…Giorgos Anastassiou, Panagiotis Zestanakis, Yannis Antonenas et al.·Nov 10, 2023SaveLearn
Kinetic versus Magnetic Chaos in Toroidal Plasmas: A systematic quantitative comparisonMagnetic field line chaos occurs under the presence of non-axisymmetric perturbations of an axisymmetric equilibrium and is manifested by the destruction of smooth flux surfaces formed by the field…Henok T. Moges, Yannis Antonenas, Giorgos Anastassiou et al.·Nov 10, 2023SaveLearn
Plasma Surrogate Modelling using Fourier Neural OperatorsPredicting plasma evolution within a Tokamak reactor is crucial to realizing the goal of sustainable fusion. Capabilities in forecasting the spatio-temporal evolution of plasma rapidly and accurately…Vignesh Gopakumar, Stanislas Pamela, Lorenzo Zanisi et al.·Nov 10, 2023SaveLearn
Compact in-vacuum gamma-ray spectrometer for high-repetition rate PW-class laser-matter interactionWith the advent of high repetition rate laser facilities, novel diagnostic tools compatible with these advanced specifications are required. This paper presents the design of an active gamma-ray…G. Fauvel, K. Tangtartharakul, A. Arefiev et al.·Nov 9, 2023SaveLearn
High-repetition-rate source of nanosecond duration kA-current pulses driven by relativistic laser pulsesWe report the first high-repetition rate generation and simultaneous characterization of nanosecond-scale return currents of kA-magnitude issued by the polarization of a target irradiated with a…Michael Ehret, Jakub Cikhardt, Philip Bradford et al.·Nov 9, 2023SaveLearn
Long radial coherence of electron temperature fluctuations in non-local transport in HL-2A plasmasThe dynamics of long-wavelength (kθ<1.4 \ cm-1), broadband (20-200 kHz) electron temperature fluctuations ( Te/Te) of plasmas in gas-puff experiments were observed for the…Zhongbing Shi, Kairui Fang, Jingchun Li et al.·Nov 9, 2023SaveLearn
Not-so-efficient proton acceleration by an intense laser pulse obliquely incident on a structured targetThe interaction of an obliquely incident laser pulse with a flat TNSA target is known to enhance the cut-off energy of protons/ions as compared to a normally incident laser pulse, mostly owing to…Imran Khan, Vikrant Saxena·Nov 9, 2023SaveLearn
Nonlinear dynamics of large-amplitude, small-scale Alfvén wavesWe study large-amplitude, very oblique Alfvén waves at low β, with small gradient length scales, comparable to the ion inertial scale di. Such waves have large density fluctuations, and slight…Alfred Mallet·Nov 9, 2023SaveLearn
The SPARC Primary Reference Discharge defined by cfsPOPCONThe Primary Reference Discharge (PRD) is a design point maximizing the highest-achievable fusion power gain in a full-field (12.2T), full-current (8.7MA) DT-fueled H-mode on SPARC. The Primary…Thomas Body, Christoph Hasse, Alex Creely·Nov 8, 2023SaveLearn
Ion temperature and density gradient driven instabilities and turbulence in Wendelstein 7-X close to the stability thresholdElectrostatic gyrokinetic instabilities and turbulence in the Wendelstein 7-X stellarator are studied. Particular attention is paid to the ion-temperature-gradient (ITG) instability and its character…L. Podavini, A. Zocco, J. M. García-Regaña et al.·Nov 7, 2023SaveLearn
Practical Classical Molecular Dynamics Simulations for Low-Temperature Plasma Processing: A reviewMolecular Dynamics simulations are becoming a powerful tool for examining and predicting atomic and molecular processes in various environment. The present review shows how, in the fields of plasma…Pascal Brault·Nov 7, 2023SaveLearn
Plasma density distribution and its perturbation by probes in axially symmetrical plasmaAn analysis of plasma density distributions at arbitrary ion-atom collisionality for one-dimensional axially symmetrical cylindrical and annular plasmas is presented. Perturbations of plasma…Valery Godyak, Natalia Sternberg·Nov 7, 2023SaveLearn
Laser-driven ion and electron acceleration from near-critical density gas targets: towards high-repetition rate operation in the 1 PW, sub-100 fs laser interaction regimeIon acceleration from gaseous targets driven by relativistic-intensity lasers was demonstrated as early as the late 90s, yet most of the experiments conducted to date have involved…V. Ospina-Bohórquez, C. Salgado-López, M. Ehret et al.·Nov 7, 2023SaveLearn
Chaotic transport in symplectic maps: Applications in plasmaChaotic transport is related to the complex dynamical evolution of chaotic trajectories in Hamiltonian systems, which models various physical processes. In magnetically confined plasma, it is…Matheus Silva Palmero·Nov 7, 2023SaveLearn
Effect of the neutral beam injector operational regime on the Alfven eigenmode saturation phase in DIII-D plasmaThe aim of this study is to analyze the effect of the neutral beam injector (NBI) operation regime on the saturation phase of the Alfven Eigenmodes (AEs) in DIII-D plasma. The analysis is done using…J Varela, D A Spong, L Garcia et al.·Nov 7, 2023SaveLearn