A similarity reduction of the generalized Grad-Shafranov equationWe extend previous work [Y. E. Litvinenko, Phys. Plasmas 17, 074502 (2010)] on a direct method for finding similarity reductions of partial differential equations such as the Grad-Shafranov equation,…A. I. Kuiroukidis, D. A. Kaltsas, G. N. Throumoulopoulos·Jan 17, 2024SaveLearn
Heuristic predictions of RMP configurations for ELM suppression in ITER burning plasmas and their impact on divertor performanceA subspace of resonant magnetic perturbation (RMP) configurations for edge localized mode (ELM) suppression is predicted for H-mode burning plasmas at 15 MA current and 5.3 T magnetic field in ITER.…H. Frerichs, J. van Blarcum, Y. Feng et al.·Jan 17, 2024SaveLearn
Implications of Vertical Stability Control on the SPARC TokamakTo achieve its performance goals, SPARC plans to operate in equilibrium configurations with a strong elongation of κareal1.75, destabilizing the n=0 vertical instability. However,…A. O. Nelson, D. T. Garnier, D. J. Battaglia et al.·Jan 17, 2024SaveLearn
A family of quasi-axisymmetric stellarators with varied rotational transformWe apply a continuation method to recently optimized stellarator equilibria with excellent quasi-axisymmetry (QA) to generate new equilibria with a wide range of rotational transform profiles. Using…Stefan Buller, Matt Landreman, John Kappel et al.·Jan 17, 2024SaveLearn
A Particle-in-cell Method for Plasmas with a Generalized Momentum Formulation, Part II: Enforcing the Lorenz Gauge ConditionIn a previous paper, we developed a new particle-in-cell method for the Vlasov-Maxwell system in which the electromagnetic fields and the equations of motion for the particles were cast in terms of…Andrew J. Christlieb, William A. Sands, Stephen White·Jan 17, 2024SaveLearn
Effects of colliding laser pulses polarization on e-e+ cascade development in extreme focusingThe onset and development of electron-positron cascade in a standing wave formed by multiple colliding laser pulses requires tight focusing in order to achieve the maximum laser intensity. There,…M. Jirka, S. V. Bulanov·Jan 16, 2024SaveLearn
Bohm-like Neoclassical Transport in Highly Collisional Toroidal Plasmas with High Density GradientsConventional neoclassical theory in the Pfirsch-Schlüter regime fails to accurately model collision-induced transport in toroidal plasmas with high density gradients. In this scenario, we find that…Jianyuan Xiao, Huishan Cai, Jian Liu et al.·Jan 16, 2024SaveLearn
The magnetohydrodynamic equations in terms of waveframe variablesGeneralising the Elsasser variables, we introduce the Q-variables. These are more flexible than the Elsasser variables, because they also allow to track waves with phase speeds different than the…Tom Van Doorsselaere, Norbert Magyar, M. Valeria Sieyra et al.·Jan 15, 2024SaveLearn
Electrical Conductivity of Hydrogen Plasmas: Low-density Benchmarks and Virial Expansion Including e-e CollisionsAn improved virial expansion for the low-density limit of the electrical conductivity σ(T,n) of hydrogen as the simplest ionic plasma is presented. Quantum statistical methods provide exact values…G. Röpke·Jan 15, 2024SaveLearn
Effects of plasma nonuniformity on toroidal Alfvén eigenmode nonlinear decayThe parametric decay of toroidal Alfvén eigenmode (TAE) in nonuniform plasmas is investigated using nonlinear gyrokinetic equation. It is found that, the plasma nonuniformity not only significantly…Zhiwen Cheng, Kexun Shen, Zhiyong Qiu·Jan 15, 2024SaveLearn
Sheath constraints on turbulent magnetised plasmasA solid target in contact with a plasma charges (negatively) to reflect the more mobile species (electrons) and thus keep the bulk plasma quasineutral. To shield the bulk plasma from the charged…Alessandro Geraldini, Stephan Brunner, Felix I. Parra·Jan 14, 2024SaveLearn
Enhanced α particle generation via proton-boron fusion reactions in laser-modulated plasmaAneutronic and nonradioactive properties make the proton-boron fusion a prospective candidate for fusion energy production through reactions following p+11B→3α (p-11B).…Yihang Zhang, Zhe Zhang, Yufeng Dong et al.·Jan 14, 2024SaveLearn
Resistive Wall Tearing Mode DisruptionsThis paper deals with resistive wall tearing mode (RWTM) disruptions. RWTMs are closely related to resistive wall modes (RWMs). The nonlinear behavior of these modes is strongly dependent on the…H. R. Strauss, B. E. Chapman, B. C. Lyons·Jan 13, 2024SaveLearn
Shear Alfvenic Waves in Electron-Positron Plasma: Analysis of Solitary Wave Properties and Numerical ValidationThe investigation employed the reductive perturbation approach to study the nonlinear propagation of shear Alfvenic waves in an electron-positron (EP) plasma medium. Utilizing the solitary wave…T. I. Rajib·Jan 13, 2024SaveLearn
Disorder-induced heating in molecular atmospheric pressure plasmasRecent work has shown that ions are strongly coupled in atmospheric pressure plasmas when the ionization fraction is sufficiently large, leading to a temperature increase from disorder-induced…Jarett LeVan, Marco Acciarri, Scott Baalrud·Jan 12, 2024SaveLearn
Plasma potential shaping using end-electrodes in the Large Plasma DeviceWe perform experiments in the Large Plasma Device (LAPD) at the University of California, Los Angeles, studying how different end-electrode biasing schemes modify the radial potential profile in the…R. Gueroult, S. K. P. Tripathi, F. Gaboriau et al.·Jan 12, 2024SaveLearn
Numerical thermalization in 2D PIC simulations: Practical estimates for low temperature plasma simulationsThe process of numerical thermalization in particle-in-cell (PIC) simulations has been studied extensively. It is analogous to Coulomb collisions in real plasmas, causing particle velocity…Sierra Jubin, Andrew Tasman Powis, Willca Villafana et al.·Jan 11, 2024SaveLearn
Effects of zero and reversed magnetic shear on resistive wall modes in a limiter tokamak plasmaAdvanced tokamak scenarios often feature equilibriums with zero and reversed magnetic shear. To isolate and investigate their impacts on the resistive wall mode (RWM) instability analytically, we…Sui Wan, Ping Zhu, Haolong Li et al.·Jan 11, 2024SaveLearn
Klystron type X-ray crystal-based Volume Free Electron Laser (XVFEL)Typical parameters of electron bunches available now in undulator X-ray FELs enable generation of induced radiation in crystal-based X-ray VFEL. An important peculiarity of an undulator X-ray FEL is…V. G. Baryshevsky·Jan 10, 2024SaveLearn
Coherent Control of Relativistic Electron Dynamics in Plasma NanophotonicsIntense femtosecond laser pulses interacting with solids can drive electrons to relativistic energies, enabling miniaturized particle accelerators and bright extreme-ultraviolet light sources.…Ankit Dulat, Sk Rakeeb, Sagar Dam et al.·Jan 10, 2024SaveLearn
Stochastic modelling of blob-like plasma filaments in the scrape-off layer: Continuous velocity distributionsA stochastic model for a superposition of uncorrelated pulses with a random distribution of amplitudes, sizes, and velocities is analyzed. The pulses are assumed to move radially with fixed shape and…J. M. Losada, O. Paikina, O. E. Garcia·Jan 10, 2024SaveLearn
Electromagnetically Induced Transparency in Strongly Relativistic RegimeStable transport of laser beams in highly over-dense plasmas is of significance in fast ignition of inertial confinement fusion, relativistic electrons generation, and powerful electromagnetic…Tie-Huai Zhang, Wei-Min Wang, Yu-Tong Li et al.·Jan 10, 2024SaveLearn
HYPIC: A fast hybrid EM PIC-MCC code for ion cyclotron resonance energization in cylindrical coordinate systemIon cyclotron resonance energization (ICRE) such as ion cyclotron resonance heating (ICRH) is widely applied to magnetic confinement fusion and high-power electric propulsion. Since ICRE involves…Mingyang Wu, Andong Xu, Chijie Xiao·Jan 10, 2024SaveLearn
Theoretical research on low-frequency drift Alfvén waves in general Tokamak equilibriaWe developed kinetic models based on general fishbone-like dispersion relations. Firstly, a general model for arbitrary magnetic configuration and ion orbit width is presented. Then, by disregarding…Yang Li·Jan 9, 2024SaveLearn
Effect of Longitudinal Fluctuations of 3D Weizsäcker-Williams Field on Pressure Isotropization of GlasmaWe investigate the effects of boost invariance breaking on the isotropization of pressure in the glasma, using the 3+1D glasma simulation. The breaking is attributed to spatial fluctuations of the…Hidefumi Matsuda, Xu-Guang Huang·Jan 9, 2024SaveLearn