Results 51 to 60 of about 4,697,162 (157)
Snowflake divertor configuration studies for NSTX-Upgrade [PDF]
, 2011 Snowflake divertor experiments in NSTX provide basis for PMI development toward NSTX-Upgrade. Snowflake configuration formation was followed by radiative detachment. Significant reduction of steady-state divertor heat flux observed in snowflake divertor.
Soukhanovskii, V A
core
Numerical optimization of three-dimensional coils for NSTX-U
Plasma Physics and Controlled Fusion, 2015 A tool for the calculation of optimal three-dimensional (3D) perturbative magnetic fields in tokamaks has been developed. The IPECOPT code builds upon the stellarator optimization code STELLOPT to allow for optimization of linear ideal magnetohydrodynamic perturbed equilibrium (IPEC).
S A Lazerson +3 more
openaire +2 more sources
Initial operation of the NSTX-Upgrade real-time velocity diagnostic
, 2016 A real-time velocity (RTV) diagnostic based on active charge-exchange recombination spectroscopy is now operational on the National Spherical Torus Experiment-Upgrade (NSTX-U) spherical torus (Menard et al 2012 Nucl. Fusion 52 083015).
Bell, R.E., Podesta, M
core +1 more source
Reduced Model for Direct Induction Startup Scenario Development on MAST-U and NSTX-U
, 2019 A reduced semi-empirical model using time-dependent axisymmetric vacuum field calculations is used to develop the prefill and feed-forward coil current targets required for reliable direct induction (DI) startup on the new MA-class spherical tokamaks ...
Kogan, L +5 more
core
Validation of gyrokinetic simulations in NSTX and projections for high-k turbulence measurements in NSTX-U [PDF]
, 2020 An extensive validation effort performed for a modest-beta NSTX NBI-heated H-mode discharge predicts that electron thermal transport can be entirely explained by electron-scale turbulence fluctuations driven by the electron temperature gradient mode (ETG)
N. T. Howard +19 more
core +1 more source
Nuclear Materials and Energy, 2017 The use of low atomic number liquid metals has been shown to have the potential to solve many of the prevalent problems like erosion and radiation losses associated with the interaction of fusion plasma with the plasma facing component (PFC) structures ...
D.N. Ruzic +11 more
doaj +1 more source
A scalable real-time framework for Thomson scattering analysis: Application to NSTX-U
, 2019 A detailed description of a prototype setup for real-time (rt) Thomson scattering (TS) analysis is presented and implemented in the multi-point Thomson scattering (MPTS) diagnostic system at the National Spherical Torus Experiment Upgrade(NSTX-U).
F. M. Laggner, A. Diallo, B. P. LeBlanc, R. Rozenblat, G. Tchilinguirian, E.Kolemen, the NSTX-U team
core
Global gyrokinetic simulations of kinetic ballooning mode in NSTX-U plasmas
Nuclear FusionUnderstanding the kinetic ballooning mode (KBM) is crucial for optimizing plasma performance in high- β spherical tokamaks. Global gyrokinetic simulations of KBMs in a projected NSTX-U shot are presented using realistic magnetic geometry and plasma ...
Tajinder Singh +4 more
doaj +1 more source
Lithium vapor cave design considerations
Nuclear Materials and EnergyRecent calculations of the lithium vapor box divertor using SOLPS have demonstrated that far Scrape-Off Layer (SOL) baffling and the corresponding far SOL lithium evaporation are unnecessary for divertor performance.
E.D. Emdee, R.J. Goldston
doaj +1 more source
Counter-propagating toroidal Alfvén eigenmodes in tokamaks
Nuclear FusionMechanisms of destabilization of toroidal Alfvén eigenmodes (TAEs) in tokamaks are analyzed with the aim to reveal those leading to modes propagating in the direction opposite to plasma current, i.e. counter-propagating modes (ctr-TAE). Plasmas with fast-
Ya.I. Kolesnichenko +3 more
doaj +1 more source