The ion acoustic instability of the cylindrical inhomogeneous helicon discharge plasma with rotating electronsThe kinetic theory of the microinstabilities of a cylindrical plasma, produced by the cylindrical azimuthally symmetric (azimuthal mode number m0=0) helicon wave, is developed. This theory is…V. V. Mikhailenko, Hae June Lee, V. S. Mikhailenko et al.·Apr 30, 2022SaveLearn
Runaway electron velocity-space observation regions of bremsstrahlung hard X-ray spectroscopyThe reconstruction of the distribution function of runaway electrons (RE) in magnetically confined fusion plasmas gives insights on the runaway electron beam dynamics during plasma disruptions. In…Enrico Panontin, Massimo Nocente, Andrea Dal Molin et al.·Apr 29, 2022SaveLearn
Electron heating in 2-D: combining Fermi-Ulam acceleration and magnetic-moment non-adiabaticity in a mirror-configuration plasmaWe analyze a new mechanism for the creation and confinement of energetic electrons in a mirror-configuration plasma. A Fermi-Ulam-type process, driven by end-localized coherent electrostatic…C. P. S. Swanson, S. A. Cohen, C. A. Galea·Apr 27, 2022SaveLearn
Magnetohydrodynamic Turbulence: Chandrasekhar's Contributions \& BeyondIn the period of 1948-1955, Chandrasekhar wrote four papers on magnetohydrodynamic (MHD) turbulence, which are the first set of papers in the area. The field moved on following these pioneering…Mahendra K. Verma·Apr 27, 2022SaveLearn
Taylor's Frozen-in Hypothesis for Magnetohydrodynamic turbulence and Solar WindIn hydrodynamics, Taylor's frozen-in hypothesis connects the wavenumber spectrum to the frequency spectrum of a time series measured in real space. In this paper, we generalize Taylor's…Mahendra K. Verma·Apr 27, 2022SaveLearn
Machine learning in the study of phase transition of two-dimensional complex plasmasMachine learning is applied to investigate the phase transition of two-dimensional complex plasmas. The Langevin dynamics simulation is employed to prepare particle suspensions in various…He Huang, Vladimir Nosenko, Han-Xiao Huang-Fu et al.·Apr 27, 2022SaveLearn
H-mode inhibition in negative triangularity tokamak reactor plasmasInstability to high toroidal mode number (n) ballooning modes has been proposed as the primary gradient-limiting mechanism for tokamak equilibria with negative triangularity (δ) shaping,…A. O. Nelson, C. Paz-Soldan, S. Saarelma·Apr 26, 2022SaveLearn
Thomson scattering on the Large Plasma DeviceWe have developed a non-collective Thomson scattering diagnostic for measurements of electron density and temperature on the Large Plasma Device. A triple grating spectrometer with a tunable notch…Sofiya Ghazaryan, Marietta Kaloyan, Walter Gekelman et al.·Apr 26, 2022SaveLearn
Development and validation of the numerical model of Electron Cyclotron Resonance Ion SourcesProcesses of the secondary electron emission (SEE) from the walls are included into the Numerical Advanced Model of Electron Cyclotron Resonance Ion Sources (NAM-ECRIS). It is found that SEE strongly…V. Mironov, S. Bogomolov, A. Bondarchenko et al.·Apr 26, 2022SaveLearn
Deep electric field predictions by drift-reduced Braginskii theory with plasma-neutral interactions based upon experimental images of boundary turbulenceWe present 2-dimensional turbulent electric field calculations via physics-informed deep learning consistent with (i) drift-reduced Braginskii theory under the framework of an axisymmetric fusion…Abhilash Mathews, Jerry Hughes, James Terry et al.·Apr 25, 2022SaveLearn
Spin Transport Hydrodynamics of Polarized Deuterium-Tritium Fusion PlasmaThe spin transport equations for polarized deuterium-tritium (DT) fusion plasma are derived with the density matrix formulation, which are used to investigate the hydrodynamics of polarized…Ronghao Hu, Hao Zhou, Zhihao Tao et al.·Apr 25, 2022SaveLearn
Pre-acceleration in the Electron Foreshock I: Electron Acoustic WavesTo undergo diffusive shock acceleration, electrons need to be pre-accelerated to increase their energies by several orders of magnitude, else their gyro-radii are smaller than the finite width of the…Paul J. Morris, Artem Bohdan, Martin S. Weidl et al.·Apr 25, 2022SaveLearn
Plasma assisted CO2 splitting to carbon and oxygen: A concept review analysisThis concept review paper analyses the possibility to develop a technical solution for the challenging reaction of CO2 splitting to carbon and O2 (CO2tC). This is a dream reaction in the…Gabriele Centi, Siglinda Perathoner, Georgia Papanikolaoua·Apr 24, 2022SaveLearn
Hydrodynamic and kinetic representation of the microscopic dynamics as the transitions on the macroscopic scale of description and meaning of the self-consistent field approximation in these modelsThe open problem of derivation of the relativistic Vlasov equation for the systems of charged particles moving with the velocities up to the speed of light and creating the electromagnetic field in…Pavel A. Andreev·Apr 23, 2022SaveLearn
L-shell X-ray conversion yields for laser-irradiated tin and silver foilsWe have employed the VULCAN laser facility to generate a laser plasma X-ray source for use in photoionisation experiments. A nanosecond laser pulse with an intensity of order 1015 Wcm-2…R. L. Singh, S. White, M. Charlwood et al.·Apr 23, 2022SaveLearn
DC-driven positive streamer coronas in airflowAn experimental study of the effect of laminar airflow on positive self-pulsating streamer coronas in a needle-to-plate geometry is presented. The experiments are performed in an open return wind…Benjamin C. Martell, Lee R. Strobel, Carmen Guerra-Garcia·Apr 22, 2022SaveLearn
Constructing the space of quasisymmetric stellaratorsA simplified view of the space of optimised stellarators has the potential to guide and aid the design efforts of magnetic confinement configurations suitable for future fusion reactors. We present…Eduardo Rodriguez, Wrick Sengupta, Amitava Bhattacharjee·Apr 21, 2022SaveLearn
On scattering and damping of Toroidal Alfven eigenmode by drift wave turbulenceWe demonstrate analytically that, in toroidal plasmas, scattering by drift wave turbulence could lead to appreciable damping of toroidal Alfven eigenmodes via generation of short-wavelength electron…Liu Chen, Zhiyong Qiu, Fulvio Zonca·Apr 21, 2022SaveLearn
Experimental Measurements of Ion Diffusion Coefficients and Heating in a Multi-Ion-Species Plasma ShockCollisional plasma shocks generated from supersonic flows are an important feature in many astrophysical and laboratory high-energy-density plasmas. Compared to single-ion-species plasma shocks,…F. Chu, A. L. LaJoie, B. D. Keenan et al.·Apr 20, 2022SaveLearn
Laser pulse shape designer for direct-drive inertial confinement fusionA pulse shape designer for direct drive inertial confinement fusion has been developed, it aims at high compression of the fusion fuel while keeping hydrodynamics instability within tolerable level.…Tao Tao, Guannan Zheng, Qing Jia et al.·Apr 20, 2022SaveLearn
Linear kinetic effects of core plasma on low frequency Alfven and acoustic eigenmodes in tokamaksThe resonant and non-resonant effects of core plasma on the excitation of low frequency modes with ω< ωBAE, such as Beta-induced Alfvén Acoustic Eigenmodes (BAAEs) and Kinetic Ballooning Modes…Ilija Chavdarovski, Fulvio Zonca, Liu Chen·Apr 20, 2022SaveLearn
Electric field in spatially inhomogeneous non-neutral plasmaWe present a general expression for the probability distribution function of electric field in a plasma cloud formed by the impact of a laser pulse on a gas or a solid body. We also present the…S. Ya. Bronin, E. V. Vikhrov, B. B. Zelener et al.·Apr 20, 2022SaveLearn
Existence of weakly quasisymmetric magnetic fields in asymmetric toroidal domains with non-tangential quasisymmetryA quasisymmetry is a special symmetry that enhances the ability of a magnetic field to trap charged particles. Quasisymmetric magnetic fields may allow the realization of next generation fusion…Naoki Sato·Apr 20, 2022SaveLearn
Optimizing doping parameters of target to enhance direct-drive implosionDirect-drive is an important approach to achieving the ignition of inertial confinement fusion. To enhance implosion performance while keeping the risk of hydrodynamic instability at a low level, we…Guannan Zheng, Tao Tao, Qing Jia et al.·Apr 20, 2022SaveLearn
Flat bubble regime and laminar plasma flow in a plasma wake field acceleratorA simple 2D model of the bubble formation in a plasma wakefield accelerator is developed and investigated. It is shown that in the case of a flat driver the bubble may consist of two parts that…S. S. Baturin·Apr 19, 2022SaveLearn