Sawtooth crash in tokamak as a sequence of Multi-region Relaxed MHD equilibriaThis study examines the sawtooth crash phenomenon in tokamak plasmas by modelling it as a sequence of Multi-region Relaxed Magnetohydrodynamic (MRxMHD) equilibria. Using the Stepped-Pressure…Zhisong Qu, Yao Zhou, Arunav Kumar et al.·Jan 24, 2025SaveLearn
Blob velocities and sizes in the Alcator C-Mod scrape-off layer for ohmic and high confinement mode plasmasAn improved time delay estimation method is used to calculate the velocity of cross-field blob motion in the scrape-off layer of Alcator C-Mod for an ohmic and two high confinement (H-mode) plasmas;…A. D. Helgeland, J. M. Losada, J. L. Terry et al.·Jan 24, 2025SaveLearn
Consideration on relation between penetrated power and topological charge of millimeter-wave vortex in magnetized plasmaIt was demonstrated that the vortex field of a hybrid mode can propagate in the mag-netized plasma region where plane waves are unable to propagate due to the cut-off condition. In this study, the…Chenxu Wang, Hideki Kawaguchi, Hiroaki Nakamura et al.·Jan 24, 2025SaveLearn
A projection method for particle resamplingParticle discretizations of partial differential equations are advantageous for high-dimensional kinetic models in phase space due to their better scalability than continuum approaches with respect…Mark F. Adams, Daniel S. Finn, Matthew G. Knepley et al.·Jan 23, 2025SaveLearn
PaMMA-Net: Plasmas magnetic measurement evolution based on data-driven incremental accumulative predictionAn accurate evolution model is crucial for effective control and in-depth study of fusion plasmas. Evolution methods based on physical models often encounter challenges such as insufficient…Yunfei Ling, Zijie Liu, Jun Du et al.·Jan 23, 2025SaveLearn
Zonal flow suppression of turbulent transport in the optimized stellarators W7-X and QSTKWe present a comparative study of transport in two optimized stellarator configurations: Wendelstein 7-X (W7-X) and a recent design called Quasi-Symmetric Turbulence Konzept (QSTK). Using global…Abhishek Tiwari, Joydeep Das, Jaya Kumar Alageshan et al.·Jan 22, 2025SaveLearn
Glow-to-arc transition in graphite cathode with high-current magnetron dischargeThe glow-to-arc transition is a critical phenomenon in plasma discharges, commonly leading to detrimental effects. The physical mechanisms triggering this transition remain poorly understood. The…Erwan Morel, Yoann Rozier, Tiberiu Minea·Jan 22, 2025SaveLearn
Enhanced Proton Acceleration via Petawatt Laguerre-Gaussian LasersHigh-energy, high-flux collimated proton beams with high repetition rates are critical for applications such as proton therapy, proton radiography, high-energy-density matter generation, and compact…Wenpeng Wang, Xinyue Sun, Fengyu Sun et al.·Jan 22, 2025SaveLearn
Experiments and modeling of dust particle heating resulting from changes in polarity switching in the PK-4 microgravity laboratoryIn the presence of gravity, the micron-sized charged dust particles in a complex (dusty) plasma are compressed into thin layers. However, under the microgravity conditions of the Plasma Kristall-4…Lori S. McCabe, Jeremiah Williams, Saikat Chakraborty Thakur et al.·Jan 21, 2025SaveLearn
Non-Markovian quantum kinetic simulations of uniform dense plasmas: mitigating the aliasing problemDense quantum plasmas out of equilibrium are successfully modeled using quantum kinetic equations, such as the quantum Boltzmann, Landau or Balescu-Lenard equation. However, these equations do not…C. Makait, M. Bonitz·Jan 21, 2025SaveLearn
Optimization of passive superconductors for shaping stellarator magnetic fieldsWe consider the novel problem of optimizing a large set of passive superconducting coils (PSCs) with currents induced by a background magnetic field rather than power supplies. In the nuclear fusion…Alan A. Kaptanoglu, Matt Landreman, Michael C. Zarnstorff·Jan 21, 2025SaveLearn
Asymptotic scaling laws for the stagnation conditions of Z-pinch implosionsImplosions of magnetically-driven annular shells (Z pinches) are studied in the laboratory to produce high-energy-density plasmas. Such plasmas have a wide-range of applications including x-ray…D. E. Ruiz, C. A. Williams, R. A. Vesey·Jan 21, 2025SaveLearn
Inverse cascade from helical and nonhelical decaying columnar magnetic fieldsPowerful lasers may in future produce magnetic fields that would allow us to study turbulent magnetohydrodynamic inverse cascade behavior. This has so far only been seen in numerical simulations. In…Axel Brandenburg, Longqing Yi, Xianshu Wu·Jan 21, 2025SaveLearn
Wakefield-induced THz wave generation in a hybrid dielectric-plasma cylindrical waveguideIn the present study, the generation of THz radiation through wakefield excitation in a cylindrical dielectric plasma waveguide is investigated. The proposed hybrid dielectric-plasma wakefield…A. A. Molavi Choobini, F. M. Aghamir·Jan 21, 2025SaveLearn
Forward Raman Scattering and Self-Modulation instabilities of lasers in magnetized tapered plasma channelsThe propagation of laser pulses in tapered magnetized plasma channels is analyzed using the fluid theory of cold plasmas. This study focuses on laser propagation's key instabilities: forward…S. S. Ghaffari-Oskooei, A. A. Molavi Choobini·Jan 21, 2025SaveLearn
Transversely pumped laser driven particle acceleratorWe present a new acceleration scheme capable of accelerating electrons and ions in an underdense plasma. Transversely Pumped Acceleration (TPA) uses multiple arrays of counter-propagating laser…Tanner Nutting, Nicholas Ernst, Alexander G. R. Thomas et al.·Jan 21, 2025SaveLearn
Strong-field ionization in particle-in-cell simulationsThe inclusion of the process of multiple ionization of atoms in high-intensity electromagnetic fields into particle-in-cell (PIC) codes applied to the simulation of laser-plasma interactions is a…A. A. Mironov, E. G. Gelfer, I. I. Tupitsyn et al.·Jan 20, 2025SaveLearn
Three-dimensional boundary turbulence simulations of a RFX-mod plasma in the presence of voltage biasingThree-dimensional turbulence simulations of a RFX-mod diverted plasma are performed in the presence of a biasing electrode. The simulations show a strong suppression of turbulent transport caused by…M. Giacomin, N. Vianello, R. Cavazzana et al.·Jan 20, 2025SaveLearn
A Grad-Shafranov model for compact quasisymmetric stellaratorsA Grad-Shafranov equation (GSE) valid for compact quasisymmetric stellarators is derived by an asymptotic expansion around a vacuum field carried to first order. We obtain an equation for the…Nikita Nikulsin, Wrick Sengupta, Stefan Buller et al.·Jan 20, 2025SaveLearn
The gyrokinetic field invariant and electromagnetic temperature-gradient instabilities in `good-curvature' plasmasCurvature-driven instabilities are ubiquitous in magnetised fusion plasmas. By analysing the conservation laws of the gyrokinetic system of equations, we demonstrate that the well-known spatial…P. G. Ivanov, P. Luhadiya, T. Adkins et al.·Jan 20, 2025SaveLearn
Exact Stark analytical function for Hα line based on the FFM Model related with plasma parametersOptical Emission Spectroscopy is a widely used technique for plasma diagnosis, with particular interest in hydrogen atomic emission due to its prevalence in plasmas. However, accurately determining…A. Sarsa, A. Jiménez-Solano, M. S. Dimitrijević et al.·Jan 19, 2025SaveLearn
Resolving discrepancies in bang-time predictions for indirect-drive ICF experiments on the NIF: Insights from the Build-A-Hohlraum campaignThis study investigated discrepancies between measured and simulated x-ray drive in Inertial Confinement Fusion (ICF) hohlraums at the National Ignition Facility (NIF). Despite advances in…G. F. Swadling, W. A. Farmer, H. Chen et al.·Jan 17, 2025SaveLearn
High-quality electron beam generation from laser wakefield accelerators for driving compact free electron lasersDespite the successful demonstration of compact free electron lasers (FELs) driven by laser wakefield accelerators (LWFAs), the pursuit of further enhancements in high-gain compact FELs presents a…Ke Feng, Kangnan Jiang, Runshu Hu et al.·Jan 17, 2025SaveLearn
Invariant tori for the pressure-jump HamiltonianA major achievement of Dewar and coworkers is the SPEC code to construct stepped-pressure equilibria in magnetohydrostatics without axisymmetry. Their existence had been proved by Bruno and Laurence.…Robert S. MacKay·Jan 17, 2025SaveLearn
Transport theory in moderately anisotropic plasmas: I, Collisionless aspects of axisymmetric velocity spaceA novel transport theory, based on the finitely distinguishable independent features (FDIF) hypothesis, is presented for scenarios when velocity space exhibits axisymmetry. In this theory, the…Yanpeng Wang·Jan 15, 2025SaveLearn