Energetic particles in spherical tokamak plasmas
KG McClements, ED Fredrickson - Plasma Physics and …, 2017 - iopscience.iop.org
Spherical tokamaks (STs) typically have lower magnetic fields than conventional tokamaks,
but similar mass densities. Suprathermal ions with relatively modest energies, in particular …
but similar mass densities. Suprathermal ions with relatively modest energies, in particular …
NSTX-U research advancing the physics of spherical tokamaks
JW Berkery, PO Adebayo-Ige, H Al Khawaldeh… - Nuclear …, 2024 - iopscience.iop.org
The objectives of NSTX-U research are to reinforce the advantages of STs while addressing
the challenges. To extend confinement physics of low-A, high beta plasmas to lower …
the challenges. To extend confinement physics of low-A, high beta plasmas to lower …
Recent progress in understanding electron thermal transport in NSTX
The anomalous level of electron thermal transport inferred in magnetically confined
configurations is one of the most challenging problems for the ultimate realization of fusion …
configurations is one of the most challenging problems for the ultimate realization of fusion …
Nano-CNC machining of sub-THz vacuum electron devices
D Gamzina, LG Himes, R Barchfeld… - … on Electron Devices, 2016 - ieeexplore.ieee.org
Nano-computer numerical control (CNC) machining technology is employed for the
fabrication of sub-THz (100-1000 GHz) vacuum electron devices. Submicron feature …
fabrication of sub-THz (100-1000 GHz) vacuum electron devices. Submicron feature …
Real-time capable modeling of neutral beam injection on NSTX-U using neural networks
MD Boyer, S Kaye, K Erickson - Nuclear Fusion, 2019 - iopscience.iop.org
A new model of heating, current drive, torque and other effects of neutral beam injection on
NSTX-U that uses neural networks has been developed. The model has been trained and …
NSTX-U that uses neural networks has been developed. The model has been trained and …
Plasma boundary shape control and real-time equilibrium reconstruction on NSTX-U
MD Boyer, DJ Battaglia, D Mueller, N Eidietis… - Nuclear …, 2018 - iopscience.iop.org
The upgrade to the National Spherical Torus eXperiment (NSTX-U) included two main
improvements: a larger center-stack, enabling higher toroidal field and longer pulse …
improvements: a larger center-stack, enabling higher toroidal field and longer pulse …
[HTML][HTML] Unraveling the surface chemistry processes in lithiated and boronized plasma material interfaces under extreme conditions
The review of recent theoretical and experimental research on the complex surface
chemistry processes that evolve from low-Z material conditioning on plasma-facing materials …
chemistry processes that evolve from low-Z material conditioning on plasma-facing materials …
Prediction of electron density and pressure profile shapes on NSTX-U using neural networks
MD Boyer, J Chadwick - Nuclear Fusion, 2021 - iopscience.iop.org
A new model for prediction of electron density and pressure profile shapes on NSTX and
NSTX-U has been developed using neural networks. The model has been trained and …
NSTX-U has been developed using neural networks. The model has been trained and …
[HTML][HTML] Two-dimensional turbulence cross-correlation functions in the edge of NSTX
The 2D radial vs. poloidal cross-correlation functions of edge plasma turbulence were
measured near the outer midplane using a gas puff imaging (GPI) diagnostic on NSTX …
measured near the outer midplane using a gas puff imaging (GPI) diagnostic on NSTX …
Full-wave simulations of ICRF heating regimes in toroidal plasma with non-Maxwellian distribution functions
N Bertelli, EJ Valeo, DL Green, M Gorelenkova… - Nuclear …, 2017 - iopscience.iop.org
At the power levels required for significant heating and current drive in magnetically-
confined toroidal plasma, modification of the particle distribution function from a Maxwellian …
confined toroidal plasma, modification of the particle distribution function from a Maxwellian …