Collisional damping of wave modes in ion-electron plasmasTo expand on recent work, we introduce collisional terms in the analysis of the warm ion-electron, two-fluid equations for a homogeneous plasma at rest. Consequently, the plasma is now described by…Joeri De Vadder, Jordi De Jonghe, Rony Keppens·May 19, 2024SaveLearn
Real-time equilibrium reconstruction by neural network based on HL-3 tokamakA neural network model, EFITNN, has been developed capable of real-time magnetic equilibrium reconstruction based on HL-3 tokamak magnetic measurement signals. The model processes inputs from 68…Guohui Zheng, Songfen Liu, Zongyu Yang et al.·May 18, 2024SaveLearn
Compact Spin-Polarized Positron Acceleration in Multi-Layer Microhole Array FilmsCompact spin-polarized positron accelerators play a major role in promoting significant positron application research, which typically require high acceleration gradients and polarization degree,…Zhen-Ke Dou, Chong Lv, Yousef I. Salamin et al.·May 18, 2024SaveLearn
Progress in Electron Energy Modeling for Plasma Flows and DischargesA novel formulation of the electron energy relaxation terms is presented here, which is applicable to plasma flows and discharges wherein the electron temperature could be higher or lower than the…Bernard Parent, Felipe Martin Rodriguez Fuentes·May 17, 2024SaveLearn
Characterization of the ELM-free Negative Triangularity Edge on DIII-DTokamak plasmas with strong negative triangularity (NT) shaping typically exhibit fundamentally different edge behavior than conventional L-mode or H-mode plasmas. Over the entire DIII-D database,…A. O. Nelson, L. Schmitz, T. Cote et al.·May 17, 2024SaveLearn
Identifying L-H transition in HL-2A through deep learningDuring the operation of tokamak devices, addressing the thermal load issues caused by Edge Localized Modes (ELMs) eruption is crucial. Ideally, mitigation and suppression measures for ELMs should be…Meihuizi He, Songfen Liu, Fan Xia et al.·May 17, 2024SaveLearn
The JET hybrid H-mode scenario from a pedestal turbulence perspectiveTurbulent transport is a decisive factor in determining the pedestal structure of H-modes. Here, we present the first comprehensive characterization of gyrokinetic turbulent transport in a JET hybrid…L. A. Leppin, T. Görler, L. Frassinetti et al.·May 17, 2024SaveLearn
Linear gyrokinetic simulation of kinetic infernal modeKinetic infernal mode (KIM) is an electromagnetic instability driven by thermal ions in weak magnetic shear region with a frequency similar to the kinetic ballooning mode (KBM). Gyrokinetic…Gengxian Li, Haotian Chen, Yong Xiao·May 17, 2024SaveLearn
Heavy-element damage seeding in proteins under XFEL illuminationSerial femtosecond X-ray crystallography (SFX) captures the structure and dynamics of biological macromolecules at high spatial and temporal resolutions. The ultrashort pulse produced by an X-ray…Spencer K. Passmore, Alaric L. Sanders, Andrew V. Martin et al.·May 16, 2024SaveLearn
Driver at 10 MJ and 1 shot/30min for inertial confinement fusion at high gain: efficient, compact, low-cost, low laser-plasma instabilities, beam-color selectable from 2 omega/3 omega/4 omega, applicable to multiple laser fusion schemesThe ignition at the National Ignition Facility (NIF) set off a global wave of research on the inertial fusion energy (IFE). However, IFE requires a necessary target gain G of 30-100, while it is hard…Zhan Sui, Ke Lan·May 16, 2024SaveLearn
On the edge turbulence in a DTT-like tokamak plasmaTurbulent transport provides the main contribution to particle and energy losses in tokamak plasmas, which control is of paramount importance for forthcoming reactors such as the…F. Cianfrani, G. Montani·May 16, 2024SaveLearn
Energetic particles transport in constants of motion space due to collisions in tokamak plasmasThe spatio-temporal evolution of the energetic particles in the transport time scale in tokamak plasmas is a key issue of the plasmas confinement, especially in burning plasmas. In order to include…Guo Meng, Philipp Lauber, Zhixin Lu et al.·May 16, 2024SaveLearn
Development of a plasma simulation tool for accelerating cavitiesPlasma processing of superconducting radio frequency (SRF) cavities has shown an improvement in accelerating gradient by reducing the radiation due to field emission and multipacting. Plasma…N. K. Raut, I. H. Senevirathne, T. Ganey et al.·May 16, 2024SaveLearn
Experimental Validation of Collision-Radiation Dataset for Molecular Hydrogen in PlasmasQuantitative spectroscopy of molecular hydrogen has generated substantial demand, leading to the accumulation of diverse elementary-process data encompassing radiative transitions, electron-impact…Keisuke Fujii, Keiji Sawada, Kuzmin Arseniy et al.·May 16, 2024SaveLearn
Advanced Tokamak: The Strongly Reversed Central Magnetic Shear ProfileThis review article will offer a qualitative overview of the strongly reversed shear profile for steady-state operation in tokamaks. For a steady-state reactor to be commercially viable, it is…Keanu Nakamura·May 16, 2024SaveLearn
Advanced surrogate model for electron-scale turbulence in tokamak pedestalsWe derive an advanced surrogate model for predicting turbulent transport at the edge of tokamaks driven by electron temperature gradient (ETG) modes.Our derivation is based on a recently developed…Ionut-Gabriel Farcas, Gabriele Merlo, Frank Jenko·May 15, 2024SaveLearn
The Realization of a Gas Puff Imaging System on the Wendelstein 7-X StellaratorA system for studying the spatio-temporal dynamics of fluctuations in the boundary of the W7-X plasma using the Gas-Puff Imaging (GPI) technique has been designed, constructed, installed, and…J. L. Terry, A. von Stechow, S. G. Baek et al.·May 15, 2024SaveLearn
Water Purification Via PlasmaWater purification via plasma is considered a healthy, effective alternative to traditional water purification systems due to the lack of harmful chemical additives that traditional purification…Angel Gonzalez-Lizardo, Gretchen Morales, Jairo Rondon et al.·May 15, 2024SaveLearn
Effect of injection conditions on the non-linear behavior of the ECDI and related turbulent transportThe electron-cyclotron drift instability (ECDI) has been proposed as one of the main actors behind the anomalous transport of electrons in Hall plasmas. In this work, we revisit the classical theory…Enrique Bello-Benítez, Alberto Marín-Cebrián, Eduardo Ahedo·May 14, 2024SaveLearn
Impurity Parallel Velocity Gradient instabilityIn magnetized plasmas, a radial gradient of parallel velocity, where parallel refers to the direction of magnetic field, can destabilise an electrostatic mode called Parallel Velocity Gradient (PVG).…Jeanne Bourgeois, Maxime Lesur, Guillermo Cuerva Lazaro et al.·May 14, 2024SaveLearn
Outside and inside a magnetic island: different perspectives to describe the same observablesWe compare three different approaches to describe a magnetic island in a generic toroidal plasma: (i) perturbative, from the perspective of the equilibrium magnetic field and the related action in a…B. Momo, I. Predebon·May 14, 2024SaveLearn
Small-Signal Model for Inhomogeneous Helix Traveling-Wave Tubes using Transfer MatricesAbstract We introduce a practical method for modeling the small-signal behavior of frequency-dispersive and inhomogeneous helix-type traveling-wave tube (TWT) amplifiers based on a generalization of…Robert Marosi, Kasra Rouhi, Tarek Mealy et al.·May 13, 2024SaveLearn
Ultrafast Spin Rotation of Relativistic Lepton Beams via Terahertz Wave in a Dielectric-Lined WaveguideSpin rotation is central for the spin-manipulation of lepton beams which, in turn, plays an important role in investigation of the properties of spin-polarized lepton beams and the examination of…Zhong-Peng Li, Yu Wang, Ting Sun et al.·May 13, 2024SaveLearn
Piecewise omnigenous stellaratorsIn omnigeneous magnetic fields, charged particles are perfectly confined in the absence of collisions and turbulence. For this reason, the magnetic configuration is optimized to be close to…J. L. Velasco, I. Calvo, F. J. Escoto et al.·May 13, 2024SaveLearn
Constructing nested coordinates inside strongly shaped toroids using an action principleA new approach for constructing polar-like boundary-conforming coordinates inside a toroid with strongly shaped cross-sections is presented. A coordinate mapping is obtained through a variational…Zeno Tecchiolli, Stuart Hudson, Joaquim Loizu et al.·May 13, 2024SaveLearn