Gyrokinetic simulations of spherical tokamaks

C. M. Roach; I. G. Abel; R. J. Akers; W. Arter; M. Barnes; Y. Camenen; F. J. Casson; G. Colyer; J. W. Connor; S. C. Cowley; D. Dickinson; W. Dorland; A. R. Field; W. Guttenfelder; G. W. Hammett; R. J. Hastie; E. Highcock; N. F. Loureiro; A. G. Peeters; M. Reshko; S. Saarelma; A. A. Schekochihin; M. Valovic; H. R. Wilson

doi:10.1088/0741-3335/51/12/124020

Gyrokinetic simulations of spherical tokamaks

C. M. Roach, I. G. Abel, R. J. Akers, W. Arter, M. Barnes, Y. Camenen, F. J. Casson, G. Colyer, J. W. Connor, S. C. Cowley, D. Dickinson, W. Dorland, A. R. Field, W. Guttenfelder, G. W. Hammett, R. J. Hastie, E. Highcock, N. F. Loureiro, A. G. Peeters, M. ReshkoS. Saarelma, A. A. Schekochihin, M. Valovic, H. R. Wilson

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

This paper reviews transport and confinement in spherical tokamaks (STs) and our current physics understanding of this that is partly based on gyrokinetic simulations. Equilibrium flow shear plays an important role, and we show how this is consistently included in the gyrokinetic framework for flows that greatly exceed the diamagnetic velocity. The key geometry factors that influence the effectiveness of turbulence suppression by flow shear are discussed, and we show that toroidal equilibrium flow shear can sometimes entirely suppress ion scale turbulence in today's STs. Advanced nonlinear simulations of electron temperature gradient (ETG) driven turbulence, including kinetic ion physics, collisions and equilibrium flow shear, support the model that ETG turbulence can explain electron heat transport in many ST discharges.

Original language	English
Article number	124020
Pages (from-to)	-
Number of pages	11
Journal	Plasma Physics and Controlled Fusion
Volume	51
Issue number	12
DOIs	https://doi.org/10.1088/0741-3335/51/12/124020
Publication status	Published - Dec 2009

Keywords

TURBULENCE SIMULATIONS
TRANSPORT
PLASMA
MODE
CONFINEMENT
MICROSTABILITY
INSTABILITIES
EQUILIBRIUM
PHYSICS
FIELD

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10.1088/0741-3335/51/12/124020

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Roach, C. M., Abel, I. G., Akers, R. J., Arter, W., Barnes, M., Camenen, Y., Casson, F. J., Colyer, G., Connor, J. W., Cowley, S. C., Dickinson, D., Dorland, W., Field, A. R., Guttenfelder, W., Hammett, G. W., Hastie, R. J., Highcock, E., Loureiro, N. F., Peeters, A. G., ... Wilson, H. R. (2009). Gyrokinetic simulations of spherical tokamaks. Plasma Physics and Controlled Fusion, 51(12), -. Article 124020. https://doi.org/10.1088/0741-3335/51/12/124020

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title = "Gyrokinetic simulations of spherical tokamaks",

abstract = "This paper reviews transport and confinement in spherical tokamaks (STs) and our current physics understanding of this that is partly based on gyrokinetic simulations. Equilibrium flow shear plays an important role, and we show how this is consistently included in the gyrokinetic framework for flows that greatly exceed the diamagnetic velocity. The key geometry factors that influence the effectiveness of turbulence suppression by flow shear are discussed, and we show that toroidal equilibrium flow shear can sometimes entirely suppress ion scale turbulence in today's STs. Advanced nonlinear simulations of electron temperature gradient (ETG) driven turbulence, including kinetic ion physics, collisions and equilibrium flow shear, support the model that ETG turbulence can explain electron heat transport in many ST discharges.",

keywords = "TURBULENCE SIMULATIONS, TRANSPORT, PLASMA, MODE, CONFINEMENT, MICROSTABILITY, INSTABILITIES, EQUILIBRIUM, PHYSICS, FIELD",

author = "Roach, {C. M.} and Abel, {I. G.} and Akers, {R. J.} and W. Arter and M. Barnes and Y. Camenen and Casson, {F. J.} and G. Colyer and Connor, {J. W.} and Cowley, {S. C.} and D. Dickinson and W. Dorland and Field, {A. R.} and W. Guttenfelder and Hammett, {G. W.} and Hastie, {R. J.} and E. Highcock and Loureiro, {N. F.} and Peeters, {A. G.} and M. Reshko and S. Saarelma and Schekochihin, {A. A.} and M. Valovic and Wilson, {H. R.}",

year = "2009",

month = dec,

doi = "10.1088/0741-3335/51/12/124020",

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Roach, CM, Abel, IG, Akers, RJ, Arter, W, Barnes, M, Camenen, Y, Casson, FJ, Colyer, G, Connor, JW, Cowley, SC, Dickinson, D, Dorland, W, Field, AR, Guttenfelder, W, Hammett, GW, Hastie, RJ, Highcock, E, Loureiro, NF, Peeters, AG, Reshko, M, Saarelma, S, Schekochihin, AA, Valovic, M & Wilson, HR 2009, 'Gyrokinetic simulations of spherical tokamaks', Plasma Physics and Controlled Fusion, vol. 51, no. 12, 124020, pp. -. https://doi.org/10.1088/0741-3335/51/12/124020

TY - JOUR

T1 - Gyrokinetic simulations of spherical tokamaks

AU - Roach, C. M.

AU - Abel, I. G.

AU - Akers, R. J.

AU - Arter, W.

AU - Barnes, M.

AU - Camenen, Y.

AU - Casson, F. J.

AU - Colyer, G.

AU - Connor, J. W.

AU - Cowley, S. C.

AU - Dickinson, D.

AU - Dorland, W.

AU - Field, A. R.

AU - Guttenfelder, W.

AU - Hammett, G. W.

AU - Hastie, R. J.

AU - Highcock, E.

AU - Loureiro, N. F.

AU - Peeters, A. G.

AU - Reshko, M.

AU - Saarelma, S.

AU - Schekochihin, A. A.

AU - Valovic, M.

AU - Wilson, H. R.

PY - 2009/12

Y1 - 2009/12

N2 - This paper reviews transport and confinement in spherical tokamaks (STs) and our current physics understanding of this that is partly based on gyrokinetic simulations. Equilibrium flow shear plays an important role, and we show how this is consistently included in the gyrokinetic framework for flows that greatly exceed the diamagnetic velocity. The key geometry factors that influence the effectiveness of turbulence suppression by flow shear are discussed, and we show that toroidal equilibrium flow shear can sometimes entirely suppress ion scale turbulence in today's STs. Advanced nonlinear simulations of electron temperature gradient (ETG) driven turbulence, including kinetic ion physics, collisions and equilibrium flow shear, support the model that ETG turbulence can explain electron heat transport in many ST discharges.

AB - This paper reviews transport and confinement in spherical tokamaks (STs) and our current physics understanding of this that is partly based on gyrokinetic simulations. Equilibrium flow shear plays an important role, and we show how this is consistently included in the gyrokinetic framework for flows that greatly exceed the diamagnetic velocity. The key geometry factors that influence the effectiveness of turbulence suppression by flow shear are discussed, and we show that toroidal equilibrium flow shear can sometimes entirely suppress ion scale turbulence in today's STs. Advanced nonlinear simulations of electron temperature gradient (ETG) driven turbulence, including kinetic ion physics, collisions and equilibrium flow shear, support the model that ETG turbulence can explain electron heat transport in many ST discharges.

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KW - TRANSPORT

KW - PLASMA

KW - MODE

KW - CONFINEMENT

KW - MICROSTABILITY

KW - INSTABILITIES

KW - EQUILIBRIUM

KW - PHYSICS

KW - FIELD

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DO - 10.1088/0741-3335/51/12/124020

M3 - Article

SN - 0741-3335

VL - 51

SP - -

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 12

M1 - 124020

ER -

Gyrokinetic simulations of spherical tokamaks

Abstract

Keywords

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