ITER-IA 3D MHD Simulations of Shattered Pellet Injection(SPI)- D1.1 Optimization of the SPI modelThis report is in partial fulfillment of deliverable D1.1 Optimization of the SPI model and summarizes axisymmetric ITER SPI parameter scans performed by the NIMROD code for several ITER equilibria.…Charlson. C. Kim, B. C. Lyons, Y. Q. Liu et al.·Oct 19, 2023SaveLearn
ITER-IA 3D MHD Simulations of Shattered Pellet Injection(SPI) -- D1.3 Code Validation (DIII-D)This report is in partial fulfillment of deliverable D1.3 Code Validation (DIII-D). These simulations focus on thermal quench phase of the SPI mitigation and are not typically carried beyond it to…Charlson. C. Kim, T. Bechtel, J. L. Herfindal et al.·Oct 19, 2023SaveLearn
Influence of the ion core on relaxation processes in dense plasmasThe effect of an ionic core on the temperature relaxation in dense hot plasma of beryllium is studied using the pseudpotential model by Gericke et al [Phys. Rev. E 2010, 81, 065401(R)]. Employing the…T. S. Ramazanov S. K. Kodanova, M. K. Issanova, B. Z. Kenzhegulov·Oct 19, 2023SaveLearn
Quantum Effects on Dynamic Structure Factors in Dense Magnetized PlasmasWe extend the classical magnetohydrodynamics formalism to include nonlocal quantum behavior via the phenomenological Bohm potential. We then solve the quantum magnetohydrodynamics equations to obtain…Tushar Mondal, Gianluca Gregori·Oct 19, 2023SaveLearn
Experimental characterization of thermionic surface cooling in thermionic dischargeIn this work, the thermionic cooling effect during thermionic discharges with parallel plate electrodes at 1 Torr is investigated. Time-resolved observation of electron emission and surface…Junhwi Bak, Albina Tropina, James Creel et al.·Oct 19, 2023SaveLearn
On the Upper Bound of Non-Thermal Fusion Reactivity with Fixed Total EnergyFusion reactivity represents the integration of fusion cross-sections and the velocity distributions of two reactants. In this study, we investigate the upper bound of fusion reactivity for a…Hua-sheng Xie, Xue-yun Wang·Oct 18, 2023SaveLearn
Comparison of detachment in Ohmic plasmas with positive and negative triangularityIn recent years, negative triangularity (NT) has emerged as a potential high-confinement L-mode reactor solution. In this work, detachment is investigated using core density ramps in lower single…O. Février, C. K. Tsui, G. Durr-Legoupil-Nicoud et al.·Oct 18, 2023SaveLearn
Multi-domain analysis and prediction of the light emitted by an inductively coupled plasma jetInductively coupled plasma wind tunnels are crucial for replicating hypersonic flight conditions in ground testing. Achieving the desired conditions (e.g., stagnation-point heat fluxes and enthalpies…Lorenzo Capponi, Alberto Padovan, Gregory S. Elliott et al.·Oct 18, 2023SaveLearn
Unforeseen advantage of looser focusing in vacuum laser accelerationAcceleration of electrons in vacuum directly by intense laser fields, often termed vacuum laser acceleration (VLA), holds great promise for the creation of compact sources of high-charge, ultrashort,…Aitor De Andres, Shikha Bhadoria, Javier Tello Marmolejo et al.·Oct 18, 2023SaveLearn
Reduced model for H-mode sustainment in unfavorable ∇ B drift configuration in ASDEX UpgradeA recently developed reduced model of H-mode sustainment based on interchange-drift-Alfvén turbulence description in the vicinity of the separatrix matching experimental observations in ASDEX Upgrade…O. Grover, T. Eich, P. Manz et al.·Oct 17, 2023SaveLearn
Single-Shot, Spatio-Temporal Metrology of Relativistic Plasma OpticsUltrahigh peak power femtosecond laser pulses create extreme states of matter that are currently being probed with great interest. Plasma optics have been proposed for shaping and amplifying…Ankit Dulat, Amit D. Lad, C. Aparajit et al.·Oct 17, 2023SaveLearn
The free energy balance equation applied to gyrokinetic instabilities, the effect of the charge flux constraint, and application to simplified kinetic modelsThe free energy balance equation for gyrokinetic fluctuations is derived and applied to instabilities. An additional term due to electromagnetic sources is included. This can provide a simpler way to…M. Kotschenreuther, X. Liu, S. M. Mahajan et al.·Oct 17, 2023SaveLearn
Excited States in Warm and Hot Dense MatterAccurate modeling of warm and hot dense matter is challenging in part due to the multitude of excited states that must be considered. In thermal density functional theory, these excited states are…C. E. Starrett, T. Q. Thelen, C. J. Fontes et al.·Oct 17, 2023SaveLearn
Evolutionarity of MHD shock waves in collisionless plasma with heat fluxesThe evolutionarity conditions for the MHD shock waves are considered within the framework of the 8-moment approximation for collisionless plasma with heat fluxes. In the general case, evolutionarity…V . D. Kuznetsov, A. I. Osin·Oct 16, 2023SaveLearn
Compton Scattering of PlasmonsWe extend de concept of Compton scattering to the case of plasmons. This concept was originally applied to electrons in vacuum. Here, we consider electrons in a plasma, and study the scattering…José Tito Mendonça, Fernando Haas·Oct 16, 2023SaveLearn
Temperature Dependent Functions of the Electron Neutral Momentum Transfer Collision Cross Sections of Selected Combustion Plasma SpeciesThe collision cross sections (CCS), momentum transfer cross sections (MTCS), or scattering cross sections (SCS) of an electron neutral pair are important components for computing the electric…Osama A. Marzouk·Oct 16, 2023SaveLearn
A linear parameters study of ion cyclotron emission using drift ring beam distributionIon cyclotron emission (ICE) holds great potential as a diagnostic tool for fast ions in fusion devices. The theory of magnetoacoustic cyclotron instability (MCI), as an emission mechanism for ICE,…Haozhe Kong, Huasheng Xie, Jizhong Sun·Oct 16, 2023SaveLearn
Three-dimensional calculations of the inductive coupling between radio-frequency waves and plasma in the drivers of the SPIDER deviceThis work documents the initial 3D calculations to simulate the coupling between radio-frequency (RF) waves and plasma in discharges of the SPIDER device. Axisymmetric 3D calculations in the plasma…Daniel López-Bruna, Mauro Recchia, Palak Jain et al.·Oct 15, 2023SaveLearn
Electron Holes in a Regularized Kappa BackgroundThe pseudopotential method is used to derive electron hole structures in a suprathermal plasma having a regularized κ probability distribution function background. The regularized character allows…Fernando Haas, Horst Fichtner, Klaus Scherer·Oct 13, 2023SaveLearn
Efficient training sets for surrogate models of tokamak turbulence with Active Deep EnsemblesModel-based plasma scenario development lies at the heart of the design and operation of future fusion powerplants. Including turbulent transport in integrated models is essential for delivering a…L. Zanisi, A. Ho, T. Madula et al.·Oct 13, 2023SaveLearn
Acceleration and focusing of multispecies ion beam using a converging laser-driven shockWe demonstrate an ion acceleration scheme capable of simultaneously focusing and accelerating a multispecies ion beam with monoenergetic spectra to a few micron radius. The focal length and ion mean…Jihoon Kim, Roopendra Rajawat, Tianhong Wang et al.·Oct 12, 2023SaveLearn
Genesis of column sprites: Formation mechanisms and optical structuresSprite discharges are electrical discharges that initiate from the lower ionosphere during intense lightning storms, manifesting themselves optically as flashes of light that last a few milliseconds.…Robert Marskar·Oct 12, 2023SaveLearn
A 3D Kinetic Distribution that Yields Observed Plasma Density in the Inner Van Allen BeltA steady-state distribution is obtained that approximately yields the observed plasma density profile of the inner Van Allen radiation belt. The model assumes a collisionless, magnetized plasma with…Snehanshu Maiti, Harishankar Ramachandran·Oct 12, 2023SaveLearn
FP3D: A code for calculating 3D magnetic field and particle motionAn efficient numerical code FP3D has been developed to calculate particle orbits and evaluate particle confinement in 3D magnetic fields including stellarators and tokamaks with 3D fields. The…P. Y. Jiang, Z. C. Feng, G. D. Yu et al.·Oct 12, 2023SaveLearn
ThunderBoltz: An Open-Source DSMC-based Boltzmann Solver for Plasma Transport, Chemical Kinetics, and 0D Plasma ModelingPlasma-neutral interactions, including reactive kinetics, are often either studied in 0D using ODE based descriptions, or in multi-dimensional fluid or particle based plasma codes. The latter case…Ryan Park, Brett S. Scheiner, Mark C. Zammit·Oct 11, 2023SaveLearn