On the effect of flux-surface shaping on trapped-electron modes in quasi-helically symmetric stellaratorsUsing a novel optimization procedure it has been shown that the Helically Symmetric eXperiment (HSX) stellarator can be optimized for reduced trapped-electron-mode (TEM) instability [M.J.~Gerard et…M. J. Gerard, M. J. Pueschel, B. Geiger et al.·Apr 10, 2024SaveLearn
Electron acceleration and X-ray generation from near-critical-density carbon nanotube foams driven by moderately relativistic lasersDirect laser acceleration of electrons in near-critical-density (NCD) carbon nanotube foams (CNFs) has its advantages in the high-efficiency generation of relativistic electrons and broadband X-rays.…Zhuo Pan, Jianbo Liu, Pengjie Wang et al.·Apr 10, 2024SaveLearn
Fluid Simulation for a Finite Size PlasmaStudies on finite-size plasma have attracted a lot of attention lately. They can form by ionizing liquid droplets by lasers. The dynamical behavior of such plasma droplets is, therefore, a topic of…Subhasish Bag, Vikrant Saxena, Amita Das·Apr 10, 2024SaveLearn
The Kadomtsev pinch revisited for sheared-flow-stabilized Z-pinch modelingThe Kadomtsev pinch, namely the Z-pinch profile marginally stable to interchange modes, is revisited in light of observations from axisymmetric MHD modeling of the FuZE sheared-flow-stabilized…Daniel W. Crews, Iman A. M. Datta, Eric T. Meier et al.·Apr 9, 2024SaveLearn
Deterministic and Stochastic Geometric Mechanics for Hall MHDWe derive new models of stochastic Hall magnetohydrodynamics (MHD) by using a symmetry-reduced stochastic Euler-Poincaré variational principle. The new stochastic Hall MHD theory has potential…Darryl D. Holm, Ruiao Hu, Oliver D. Street·Apr 9, 2024SaveLearn
Calculation of toroidal Alfvén eigenmode mode structure in general axisymmetric toroidal geometryA workflow is developed based on the ideal MHD model to investigate the linear physics of various Alfvén eigenmodes in general axisymmetric toroidal geometry, by solving the coupled shear Alfvén wave…Guangyu Wei, Matteo Valerio Falessi, Tao Wang et al.·Apr 9, 2024SaveLearn
Using a coupled optical and electrical monitoring method to follow the R-HiPIMS TiO2 deposition process driftsIn this work, coupled optical and electrical discharge measurements have been implemented to investigate the plasma state of a reactive HiPIMS TiO2 deposition process running at a fixed duty cycle…D Boivin, R Jean-Marie-Désirée, A Najah et al.·Apr 9, 2024SaveLearn
Energetic bounds on gyrokinetic instabilities. Part 4. Bounce-averaged electronsUpper bounds on the growth of instabilities in gyrokinetic systems have recently been derived by considering the optimal perturbations that maximise the growth of a chosen energy norm. This technique…P. J. Costello, G. G. Plunk·Apr 9, 2024SaveLearn
Oblique photons, plasmons, and current-plasmons in relativistic plasmas and their topological implicationsPhotons in vacuum are transverse in any inertial frame; longitudinal photons only exist virtually. By developing a manifestly covariant theory for electromagnetic excitations in relativistic plasmas…Hong Qin, Eric Palmerduca·Apr 8, 2024SaveLearn
A birdcage resonant antenna for helicon wave generation in TORPEXA birdcage resonant helicon antenna is designed, mounted and tested in the toroidal device TORPEX. The birdcage resonant antenna is an alternative to the usual Boswell or half-helical antenna designs…Simon Vincent, Philippe Guittienne, Patrick Quigley et al.·Apr 8, 2024SaveLearn
Comment to the paper J. Yan et al. Experimental confirmation of driving pressure boosting and smoothing for hybrid-drive inertial fusion at the 100-kJ laser facility [Nature Communications (2023) 14:5782]The lack of key experimental data leads us to the conclusion that, the published experimental confirmation of driving pressure boosting and smoothing for hybrid-drive inertial fusion is not credible.Ke Lan·Apr 6, 2024SaveLearn
Doubling Fusion Power with Volumetric Optimization in Magnetic Confinement Fusion DevicesA technique, volumetric power optimization, is presented for enhancing the power output of magnetic confinement fusion devices. Applied to a tokamak, this approach involves shifting the burning…J. F. Parisi, J. W. Berkery, A. Sladkomedova et al.·Apr 5, 2024SaveLearn
Quadrilateral Particle Arrangement within Shocks in a Two-Dimensional Dusty PlasmaThe microscopic structure within a two-dimensional shock was studied using data from a dusty plasma experiment. A single layer of charged microparticles, levitated in a glow-discharge plasma, was…Anton Kananovich, J. Goree·Apr 3, 2024SaveLearn
Direct, simple, and efficient computation of all components of the virtual-casing magnetic field in axisymmetric geometries with Kapur-Rokhlin quadratureIn a recent publication (Toler et al. 2023), we demonstrated that for axisymmetric geometries, the Kapur-Rokhlin quadrature rule provided an efficient and high-order accurate method for computing the…Evan Toler, Antoine Cerfon, Dhairya Malhotra·Apr 3, 2024SaveLearn
Exploration of the parameter space of quasisymmetric stellarator vacuum fields through adjoint optimisationOptimising stellarators for quasisymmetry leads to strongly reduced collisional transport and energetic particle losses compared to unoptimised configurations. Though stellarators with precise…Richard Nies, Elizabeth J. Paul, Dario Panici et al.·Apr 2, 2024SaveLearn
Benign saturation of ideal ballooning instability in a high-performance stellaratorTo examine the robustness of the designed 5% β-limit for high-performance operation in the W7-X stellarator, we undertake nonlinear magnetohydrodynamic (MHD) simulations of pressure-driven…Yao Zhou, K. Aleynikova, Chang Liu et al.·Apr 2, 2024SaveLearn
Attosecond gamma-ray flashes and electron-positron pairs in dyadic laser interaction with micro-wireThe interaction of an ultra-intense laser with matter is an efficient source of high-energy particles, with efforts directed towards narrowing the divergence and simultaneously increasing the…P. Hadjisolomou, T. M. Jeong, P. Valenta et al.·Apr 2, 2024SaveLearn
Modeling the low-pressure high-voltage branch of the Paschen curve for hydrogen and deuteriumA physical and numerical model of the Townsend discharge in molecular hydrogen and deuterium has been developed to meet the needs of designing a plasma-based switching device for power grid…Alexander V. Khrabrov, David. J. Smith, Igor D. Kaganovich·Apr 1, 2024SaveLearn
Characterization of uncertainties in electron-argon collision cross sectionsThe predictive capability of a plasma discharge model depends on accurate representations of electron-impact collision cross sections, which determine the key reaction rates and transport properties…Seung Whan Chung, Todd A. Oliver, Laxminarayan L. Raja et al.·Mar 30, 2024SaveLearn
Investigation of self-focusing of Gaussian laser beams within magnetized plasma via source-dependent expansion methodSelf-focusing emerges as a nonlinear optical phenomenon resulting from an intense laser field and plasma interaction. This study investigates the self-focusing behavior of Gaussian laser beams within…A. A. Molavi Choobini, S. S. Ghaffari-Oskooei·Mar 30, 2024SaveLearn
Structure and Dynamics of Magneto-Inertial, Differentially Rotating Laboratory PlasmasWe present a detailed characterization of the structure and evolution of differentially rotating plasmas driven on the MAGPIE pulsed-power generator (1.4 MA peak current, 240 ns rise-time). The…V. Valenzuela-Villaseca, L. G. Suttle, F. Suzuki-Vidal et al.·Mar 29, 2024SaveLearn
An ultraviolet photodetector based on conductive hydrogenated TiO2 film prepared by radio frequency atmospheric pressure plasmaThe growing demand for real-time ultraviolet (UV) monitoring calls for a simple, rapid, and low-cost strategy to prepare UV photodetectors. We prepare a wearable real-time UV photodetector based on…Yu Zhang, Haozhe Wang, Jie Cui et al.·Mar 29, 2024SaveLearn
Laser Interactions with Gas Jets: EMP Emission and Nozzle DamageUnderstanding the physics of electromagnetic pulse emission and nozzle damage is critical for the long-term operation of laser experiments with gas targets, particularly at facilities looking to…Philip Wykeham Bradford, Valeria Ospina-Bohorquez, Michael Ehret et al.·Mar 28, 2024SaveLearn
All-optical blast wave control of laser wakefield acceleration in near critical plasmaWe propose a novel method for changing the length of laser wakefield electron acceleration in a gas jet by a cylindrical blast wave created by a perpendicularly focused nanosecond laser pulse. The…I. Tsymbalov, D. Gorlova, K. Ivanov et al.·Mar 28, 2024SaveLearn
Predicting Excitation Energies in Warm Dense MatterIn a dense plasma environment, the energy levels of an ion shift relative to the isolated ion values. This shift is reflected in the optical spectrum of the plasma and can be measured in, for…T. Q. Thelen, D. A. Rehn, C. J. Fontes et al.·Mar 28, 2024SaveLearn