Results 81 to 90 of about 302,060 (167)

Overview of ST40 results and future: expanding the physics basis of high-field spherical tokamaks

Nuclear Fusion
The goal of the ST40 programme is to explore the physics of high-field spherical tokamaks (STs), to validate empirical and theoretical models and, hence, to build confidence in predictions required to support the design of future generations of STs. ST40
O. Asunta, S. Abouelazayem, T. Ahmadi, A. Alieva, M.S. Anastopoulos-Tzanis, Y. Andrew, T. Ashton-Key, N. Bertelli, H. Bohlin, T. Brewer, J. Bryant, J.J. Buck, P.F. Buxton, C.S. Chang, C. Colgan, E. Delabie, A. Dnestrovskii, V.N. Duarte, A.V. Dudkovskaia, J. Flanagan, M. Fontana, M. Gemmell, T.K. Gray, M.P. Gryaznevich, J. Hakosalo, M. Iliasova, F. Janky, J. Kang, S.M. Kaye, D. Kos, S.H. Ku, J. Lee, B. Lomanowski, N.A. Lopez, H.F. Lowe, E.N.J. Maartensson, R. Maingi, C. Marsden, L. Martinelli, S.A.M. McNamara, S.Y. Medvedev, S.R. Mirfayzi, L. Morgan, Y.S. Na, G. Naylor, V. Nemytov, T. O’Gorman, M. Ono, Y. Ono, A. Prokopyszyn, Y. Ren, A. Rengle, M. Robinson, M. Romanelli, A. Scarabosio, M. Scarpari, M. Sertoli, V. Shevchenko, T. Sian, J. Sinha, A. Sladkomedova, S. Sridhar, J. Stirling, Y. Takase, H. Tanabe, P.R. Thomas, E.J.C. Tinacba, J. Varje, E. Vekshina, B. Vincent, H. Weisen, H.V. Willett, C. Windsor, J. Wood, E. Wooldridge, X. Zhang   +75 more
doaj   +1 more source

Turbulent equipartition pinch of toroidal momentum in spherical torus [PDF]

, 2014
We present a new analytic expression for turbulent equipartition (TEP) pinch of toroidal angular momentum originating from magnetic field inhomogeneity of spherical torus (ST) plasmas.
Lee, J, Na, YS, Hwang, Y. S., Hwang, YS, Choi, GJ, Diamond, PH, Na, Y. S., Hahm, TS, Chung, KJ, Na, DH, Wang, WX, Lee, J., Wang, W. X., Choi, Gyungjin, Diamond, P. H., Na, D. H., Hahm, T. S., Chung, K. J.   +17 more
core   +1 more source

Modeling electron temperature profiles in the pedestal with simple formulas for ETG transport

Nuclear Fusion
This paper reports on the refinement (building on (Hatch D.R. et al 2022 Phys. Plasmas 29 062501)) and application of simple formulas for electron heat transport from electron temperature gradient (ETG) driven turbulence in the pedestal. The formulas are
D.R. Hatch, M.T. Kotschenreuther, P.-Y. Li, B. Chapman-Oplopoiou, J. Parisi, S.M. Mahajan, R. Groebner   +6 more
doaj   +1 more source

Development of a data-driven neural network model for electron thermal transport in NSTX

Nuclear Fusion
A data-driven electron thermal transport neural network (ETT-NN) model, trained on TRANSP interpretative analysis results of National Spherical Torus Experiment (NSTX), was developed to enable faster and more accurate ETT computation for spherical ...
H. Chung, C.Y. Lee, G.J. Choi, S.M. Kaye, B.P. LeBlanc, J.W. Berkery, Y.-S. Na   +6 more
doaj   +1 more source

Testing of the SOLPS-ITER code at Globus-M2 spherical tokamak with detached divertor

MATEC Web of Conferences, 2018
In according to a present understanding of Scrape-Off Layer (SOL) physics, future thermonuclear devices like ITER, DEMO and beyond, require high radiation regimes in order to reduce heat loads on tokamak divertor. Recent experiments at ASDEX Upgrade, JET
Sorokina Daria, Senichenkov Ilya, Vekshina Elena, Rozhansky Vladimir   +3 more
doaj   +1 more source

Breakdown of adiabatic invariance in spherical tokamaks [PDF]

Physics of Plasmas, 2001
Due to the weak but strongly varying magnetic field, fast ions in spherical tokamaks are susceptible to the breakdown of adiabatic invariance. Beam ions in present-day spherical tokamaks are typically marginally adiabatic or super-adiabatic. Super-adiabatic ions have energies in the intermediate range where the longitudinal invariant is still ...
openaire   +2 more sources

Observation of stationary filaments with resonant magnetic perturbations in NSTX

Nuclear Fusion
The application of resonant magnetic perturbations (RMPs) induces striated heat fluxes on the divertor plate in tokamaks. These striated heat fluxes were previously considered strike point splitting by the intersection between the divertor and predicted ...
K.F. Gan, E.D. Fredrickson, J.W. Berkery, S. Munaretto, A. Kleiner, M. Lampert, J.-K. Park, R. Maingi, A.G. McLean, T.K. Gray, B.D. Wirth   +10 more
doaj   +1 more source

Microstability physics as illuminated in the spherical tokamak

Plasma Physics and Controlled Fusion, 2005
Spherical tokamaks (STs) have attractive features for fusion, and there is considerable interest in understanding their transport properties which depend on the underlying microinstabilities. STs are capable of operation with low magnetic fields and exhibit large inhomogeneity in the toroidal magnetic field.
Roach, C, Applegate, D, Connor, J, Cowley, S, Dorland, W, Hastie, R, Joiner, N, Saarelma, S, Schekochihin, A, Akers, R, Brickley, C, Field, A, Valovic, M, Team, MAST   +13 more
openaire   +1 more source

Fusion, tokamaks, and plasma control - An introduction and tutorial

, 2005
The paper discusses the process behind fusion reaction, the magnetic confinement of plasma to sustain fusion reactions, different kinds of tokamaks used for the magnetic plasma confinement, the operation of tokamaks, and the control of tokamaks.
PIRONTI, ALFREDO, M. WALKER
core   +1 more source

The formation of an radial edge electric field due to finite ion orbit width effects is the possible root cause of the H-mode edge

Nuclear Fusion
Full orbit-following simulations of thermal ions show that finite ion-orbit width effects create charge separation near the last closed flux surface (LCFS) which generates a localized radial electric field.
G.J. Kramer, A. Bortolon, A. Diallo, R. Maingi   +3 more
doaj   +1 more source