Journal ArticleDOI
A first-principles predictive model of the pedestal height and width: development, testing and ITER optimization with the EPED model
P. B. Snyder,R. J. Groebner,J. W. Hughes,T.H. Osborne,M. Beurskens,Anthony Leonard,H. R. Wilson,Xueqiao Xu +7 more
TLDR
In this article, the authors developed and tested a model, EPED1.6, for the H-mode pedestal height and width based upon two fundamental and calculable constraints: onset of non-local peeling-ballooning modes at low to intermediate mode number, and onset of nearly local kinetic ballooning mode at high mode number.Abstract:
We develop and test a model, EPED1.6, for the H-mode pedestal height and width based upon two fundamental and calculable constraints: (1) onset of non-local peeling–ballooning modes at low to intermediate mode number, (2) onset of nearly local kinetic ballooning modes at high mode number. Calculation of these two constraints allows a unique, predictive determination of both pedestal height and width. The present version of the model is first principles, in that no parameters are fit to observations, and includes important non-ideal effects. Extensive successful comparisons with existing experiments on multiple tokamaks, including experiments where predictions were made prior to the experiment, are presented, and predictions for ITER are discussed.read more
Citations
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Journal ArticleDOI
ARC: A compact, high-field, fusion nuclear science facility and demonstration power plant with demountable magnets
Brandon Sorbom,Justin Ball,Timothy R. Palmer,F. J. Mangiarotti,J. M. Sierchio,Paul Bonoli,C.P. Kasten,D.A. Sutherland,Harold Barnard,Christian Bernt Haakonsen,J. Goh,Choongki Sung,Dennis G. Whyte +12 more
TL;DR: The robust, robust, compact (ARC) as discussed by the authors is the product of a conceptual design study aimed at reducing the size, cost and complexity of a combined fusion nuclear science facility (FNSF) and demonstration fusion Pilot power plant.
Journal Article
BOUT++: A framework for parallel plasma fluid simulations
TL;DR: This is the first time dissipationless, initial-value simulations of ELMs have been successfully demonstrated, and the resulting mode-structures and growth-rate are found to be in good agreement.
Journal ArticleDOI
Progress on the application of ELM control schemes to ITER scenarios from the non-active phase to DT operation
A. Loarte,G. Huijsmans,Shimpei Futatani,Larry R. Baylor,Todd Evans,D. M. Orlov,Oliver Schmitz,Marina Becoulet,P. Cahyna,Y. Gribov,A. Kavin,A. Sashala Naik,David Campbell,T.A. Casper,E. Daly,H. Frerichs,A. Kischner,R. Laengner,S.W. Lisgo,R.A. Pitts,G. Saibene,Andreas Wingen +21 more
TL;DR: In this paper, the authors defined the requirements for edge localized mode (ELM) control and the application of ELM control methods both for high fusion performance DT operation and non-active low-current operation in ITER.
Journal ArticleDOI
Edge-localized-modes in tokamaksa)
TL;DR: In this article, the authors show that when the gradient in the H-mode transport barrier grows to exceed the MHD stability limit, the ELM instability grows explosively, rapidly transporting energy and particles onto open field lines and material surfaces.
Journal ArticleDOI
Integrated modeling applications for tokamak experiments with OMFIT
Orso Meneghini,Sterling Smith,L.L. Lao,Olivier Izacard,Qilong Ren,Jin Myung Park,Jeff Candy,Z. X. Wang,C. Luna,V.A. Izzo,Brian Grierson,P. B. Snyder,Christopher Holland,J. Penna,G. Lu,Peter Raum,A.J. McCubbin,D. M. Orlov,Emily Belli,Nathaniel Ferraro,Ron Prater,T.H. Osborne,A. D. Turnbull,G. M. Staebler +23 more
TL;DR: The framework made possible the design and automation of a workflow that enables self-consistent predictions of kinetic profiles and the plasma equilibrium, and it was found that the feedback between the transport fluxes and plasma equilibrium can significantly affect the kinetic profiles predictions.
References
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Journal ArticleDOI
Edge localized modes and the pedestal: A model based on coupled peeling–ballooning modes
P. B. Snyder,H. R. Wilson,J.R. Ferron,L. L. Lao,Anthony Leonard,T.H. Osborne,A. D. Turnbull,D. A. Mossessian,Masakatsu Murakami,Xueqiao Xu +9 more
TL;DR: In this paper, a model based on magnetohydrodynamic stability of the tokamak plasma edge region is presented, which describes characteristics of edge localized modes (ELMs) and the pedestal.
Journal ArticleDOI
Magnetohydrodynamic stability of tokamak edge plasmas
TL;DR: In this article, a new formalism for analyzing the magnetohydrodynamic stability of a limiter tokamak edge plasma is developed, and two radially localized, high toroidal mode number n instabilities are studied in detail: a peeling mode and an edge ballooning mode.
Journal ArticleDOI
Numerical studies of edge localized instabilities in tokamaks
TL;DR: In this paper, a new computational tool, edge localized instabilities in tokamaks equilibria (ELITE), has been developed to help our understanding of short wavelength instabilities close to the edge of tokak plasmas.
Journal ArticleDOI
BOUT++: a framework for parallel plasma fluid simulations
TL;DR: In this paper, a modular code called BOUT++ is presented, which simulates 3D fluid equations in curvilinear coordinates, and is able to simulate a wide range of fluid models (magnetized and unmagnetised) involving an arbitrary number of scalar and vector fields.
Journal ArticleDOI
Magnetohydrodynamic Equations for Finite Larmor Radius
K. V. Roberts,J. B. Taylor +1 more
TL;DR: In this article, Rosenbluth et al. showed that the cancellation of a stabilizing effect resulted from using only the scalar pressure in the ion equation of motion, and derived several additional factors using modifications to both the ion pressure tensor and Ohm's law.