Gyrokinetic Simulations for Spherical Tokamak Divertor DesignNuclear fusion is an attractive source of energy because the fuel is abundant and it produces low levels of carbon emissions. The tokamak, which confines a plasma using magnetic fields, is the most…Akash Shukla·May 21, 2026SaveLearn
Dynamics of fast magnetosonic wave turbulenceFast magnetosonic waves are among the fundamental oscillation modes of astrophysical plasmas. To study their dynamics, we carry out numerical simulations of the wave turbulence kinetic equation,…Nicolás Pablo Müller, Sébastien Galtier·May 21, 2026SaveLearn
Second stability region for gyrokinetics and the L-H transitionUsing a simple circular tokamak geometry, we show the well-known `second stability region' of MHD-ballooning modes exists for linear gyrokinetics too -- whether electrostatic or electromagnetic…R. J. J. Mackenbach, A. Zocco, P. Helander·May 21, 2026SaveLearn
On the Shafranov shift in stellaratorsAs first shown by Shafranov, toroidal plasmas in magnetohydrodynamic equilibrium tend to expand in major radius when the pressure is increased. Here, an average measure of the resulting Shafranov…Per Helander, Nikita Nikulsin·May 21, 2026SaveLearn
PIC simulations of nonrelativistic high-Mach-number oblique shocks propagating in a turbulent mediumCollisionless shocks are common in astrophysical systems and stand as sites of particle acceleration. While particles at perpendicular shocks may not return to the upstream region, at oblique shocks…Karol Fulat, Eloise Moore, Mahmoud Alawashra et al.·May 21, 2026SaveLearn
Fast ion effects on the threshold conditions of ion temperature gradient mode and electron temperature gradient modeWe investigate the fast ion effects on the threshold conditions of ion temperature gradient (ITG) mode and electron temperature gradient (ETG) mode both analytically and numerically using gyrokinetic…Min Ki Jung, Taik Soo Hahm, Yong-Su Na et al.·May 21, 2026SaveLearn
Initial evaluation of miniature ultra-high-field commercial stellarator reactors with breeding external to resistive coilsThe working parameters and challenges of ultra-high-field pulsed commercial stellarator reactors of small plasma volume with breeding external to resistive coils (transposed stellarator) are…V. Queral, E. Rincon, A. de Castro et al.·May 21, 2026SaveLearn
Optical analogy for stellarators: Ridges as caustics and coils as singularitiesA common feature of most numerically optimized stellarator geometries is the presence of sharp ridges on outer flux surfaces, irrespective of the rotational transform. Despite their importance, an…Wrick Sengupta, Stefan Buller, Rogerio Jorge et al.·May 20, 2026SaveLearn
Vortex Dipole Evolution in Viscoelastic Media: Effects of Asymmetry, Coupling, and Transverse Shear WavesThe dynamics of a Lamb-Oseen vortex dipole in a viscoelastic fluid are investigated, with emphasis on asymmetry, coupling strength, and transverse shear waves relevant to strongly coupled dusty…Vipul B Rohit, Vikram Dharodi, Sharad K Yadav·May 20, 2026SaveLearn
Photodiode based multi-modal diagnostic for low-energy neutral beam injection in the LTX-β spherical tokamakWe present a compact photodiode-based diagnostic array developed to study low-energy neutral beam injection in the LTX-β spherical tokamak. The in-vacuum diagnostic combines filtered soft-x-ray…A. Maan, Tosh Le, D. P. Boyle et al.·May 20, 2026SaveLearn
Galilean Electromagnetic Particle-in-Cell CodeWe introduce a Galilean electromagnetic particle-in-cell (GEM-PIC) algorithm, which transforms the full set of Maxwell equations and the Vlasov equation into the boosted coordinates. This approach…Alexander Pukhov, Nina Elkina, Tom Wilson·May 20, 2026SaveLearn
Fast solvers for Tokamak fluid models with PETSCMultigrid (MG) is widely recognized as a highly effective solver for the model problem, the Laplacian, but textbook MG fails on most problems of interest. MG methods have been applied to complex,…Mark F. Adams, Jin Chen, Benjamin Sturdevant·May 20, 2026SaveLearn
Radiative depolarization of high-energy electron beams in wakefield acceleratorsThe preservation of witness beam polarization in wakefield accelerators will be crucial for future collider applications. While extensive theoretical studies on the injection and initial acceleration…Oliver Mathiak, Lars Reichwein, Alexander Pukhov et al.·May 19, 2026SaveLearn
Resolving Conductor-to-Plasma Transition Through Low-Energy Electrical Explosion of metallic foilsElectrical explosion of metallic foils involves a rapid transition from solid-state conduction through melting and vaporization to formation of an ionized plasma. Resolving intermediate processes is…Aditya Nandan Savita, Sambaran Pahari, Neraj Shiv et al.·May 19, 2026SaveLearn
Topological Arrest of Ballooning Modes in Non-Axisymmetric PlasmasWhy do non-axisymmetric stellarators avoid ballooning crashes that afflict tokamaks? Three-dimensional geometry induces Anderson localization of ballooning modes, converting a global instability into…Amitava Bhattacharjee·May 19, 2026SaveLearn
The linear Rayleigh-Taylor instability with foamsWe analyse the behaviour of the linear phase of the Rayleigh-Taylor instability (RTI) in the presence of a foam. Such a problem may be relevant, for example, to some inertial confinement fusion (ICF)…Antoine Bret, Audrey DeVault, Skylar Dannhoff et al.·May 19, 2026SaveLearn
Resonantly Driven Electron Bernstein Waves in Magnetized Low-Pressure Capacitive DischargesThe physics of capacitively coupled plasma (CCP) discharges is investigated in a mildly magnetized regime, defined by 1 fce/frf < 2, where fce and frf denote the electron…Deepak Gautam, Sarveshwar Sharma, Igor Kaganovich et al.·May 19, 2026SaveLearn
Simulation Studies of Resonant Excitation of Electron Bernstein Waves in Capacitive DischargesThe behavior of capacitive coupled plasma (CCP) discharges is investigated in a mildly magnetized regime, defined by the condition 1 ≤ fce/frf 2, where fce and frf are…Deepak Gautam, Sarveshwar Sharma, Igor Kaganovich et al.·May 19, 2026SaveLearn
Production of Nuclear Battery β- Emitters Driven by Fusion NeutronsNuclear batteries require radioisotopes with specific combinations of half-life, decay mode, and radiation properties, yet most candidate fuels lack scalable production routes. We show how the future…J. F. Parisi·May 18, 2026SaveLearn
Laser-driven Ion and Neutron Sources from Medium Repetition Ultrashort PW LaserWe report the first experiment investigating ion acceleration and neutron generation irradiating thin plastic targets (CH2) and deuterated plastic targets (CD2) of thickness ranging from 30nm to…X. Jiao, C. Jeon, G. Tiwari et al.·May 18, 2026SaveLearn
Laser-Wakefield-Driven Photonuclear and Laser-Driven DD Fusion Neutron Sources for Fast Neutron Capture: A Start-to-End Simulation StudyLaser-driven neutron sources offer ultrashort pulse durations and extreme peak fluxes inaccessible to conventional facilities, enabling novel time-of-flight(TOF) spectroscopy and nuclear astrophysics…Ou Z. Labun, D. D. Phan, L. Labun et al.·May 18, 2026SaveLearn
Magnetic Prandtl number dependence of plasmoid-mediated reconnectionWe investigate the dependence of the plasmoid-mediated magnetic reconnection rate on the magnetic Prandtl number using two-dimensional magnetohydrodynamic simulations of two coalescing magnetic…Vinay Kumar, Axel Brandenburg·May 18, 2026SaveLearn
Bright, directional electron emission from nanowire coated targets under petawatt, femtosecond irradiationInteractions of relativistically intense laser pulses with structured targets have long been explored for controlling energy absorption and particle acceleration. However, at upcoming multi-petawatt…Ameya Parab, Jian Fuh Ong, Stefania Ionescu et al.·May 18, 2026SaveLearn
An explicit, energy-conserving particle-in-cell scheme for relativistic plasmasWe extend the recently-developed explicit, energy-conserving particle-in-cell (PIC) scheme of [1] to the relativistic Vlasov-Maxwell system. As in the non-relativistic case, the method is built on an…Lee Ricketson, Jingwei Hu·May 18, 2026SaveLearn
Time Series Extrinsic Regression of Ion Cyclotron Emission Spectra Trained on Particle-In-Cell SimulationsIon Cyclotron Emission (ICE) is a ubiquitous magnetised plasma phenomenon previously detected on virtually all large magnetic fusion devices and whose diagnostic potential for future power plants…Ethan Attwood, J. W. S. Cook, Peter Hill·May 18, 2026SaveLearn