Inter-machine comparison of intrinsic toroidal rotation in tokamaks

J. E. Rice; A. Ince-Cushman; J. S. Degrassie; L. G. Eriksson; Y. Sakamoto; A. Scarabosio; A. Bortolon; K. H. Burrell; B. P. Duval; C. Fenzi-Bonizec; M. J. Greenwald; R. J. Groebner; G. T. Hoang; Y. Koide; E. S. Marmar; A. Pochelon; Y. Podpaly

doi:10.1088/0029-5515/47/11/025

Inter-machine comparison of intrinsic toroidal rotation in tokamaks

J. E. Rice
, A. Ince-Cushman
, J. S. Degrassie
, L. G. Eriksson
, Y. Sakamoto
, A. Scarabosio
, A. Bortolon
, K. H. Burrell
, B. P. Duval
, C. Fenzi-Bonizec
, M. J. Greenwald
, R. J. Groebner
, G. T. Hoang
, Y. Koide
, E. S. Marmar
, A. Pochelon
, Y. Podpaly

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

Abstract

Parametric scalings of the intrinsic (spontaneous, with no external momentum input) toroidal rotation observed on a large number of tokamaks have been combined with an eye towards revealing the underlying mechanism(s) and extrapolation to future devices. The intrinsic rotation velocity has been found to increase with plasma stored energy or pressure in JET, Alcator C-Mod, Tore Supra, DIII-D, JT-60U and TCV, and to decrease with increasing plasma current in some of these cases. Use of dimensionless parameters has led to a roughly unified scaling with M_A ∝ β_N, although a variety of Mach numbers works fairly well; scalings of the intrinsic rotation velocity with normalized gyro-radius or collisionality show no correlation. Whether this suggests the predominant role of MHD phenomena such as ballooning transport over turbulent processes in driving the rotation remains an open question. For an ITER discharge with β_N = 2.6, an intrinsic rotation Alfven Mach number of M_A ≃ 0.02 may be expected from the above deduced scaling, possibly high enough to stabilize resistive wall modes without external momentum input.

Original language	American English
Pages (from-to)	1618-1624
Number of pages	7
Journal	Nuclear Fusion
Volume	47
Issue number	11
DOIs	https://doi.org/10.1088/0029-5515/47/11/025
State	Published - 2007
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics
Condensed Matter Physics

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Rice, J. E., Ince-Cushman, A., Degrassie, J. S., Eriksson, L. G., Sakamoto, Y., Scarabosio, A., Bortolon, A., Burrell, K. H., Duval, B. P., Fenzi-Bonizec, C., Greenwald, M. J., Groebner, R. J., Hoang, G. T., Koide, Y., Marmar, E. S., Pochelon, A., & Podpaly, Y. (2007). Inter-machine comparison of intrinsic toroidal rotation in tokamaks. Nuclear Fusion, 47(11), 1618-1624. https://doi.org/10.1088/0029-5515/47/11/025

@article{ba287d105fbc4583b35790cbcd9a8c0b,

title = "Inter-machine comparison of intrinsic toroidal rotation in tokamaks",

abstract = "Parametric scalings of the intrinsic (spontaneous, with no external momentum input) toroidal rotation observed on a large number of tokamaks have been combined with an eye towards revealing the underlying mechanism(s) and extrapolation to future devices. The intrinsic rotation velocity has been found to increase with plasma stored energy or pressure in JET, Alcator C-Mod, Tore Supra, DIII-D, JT-60U and TCV, and to decrease with increasing plasma current in some of these cases. Use of dimensionless parameters has led to a roughly unified scaling with MA ∝ βN, although a variety of Mach numbers works fairly well; scalings of the intrinsic rotation velocity with normalized gyro-radius or collisionality show no correlation. Whether this suggests the predominant role of MHD phenomena such as ballooning transport over turbulent processes in driving the rotation remains an open question. For an ITER discharge with βN = 2.6, an intrinsic rotation Alfven Mach number of MA ≃ 0.02 may be expected from the above deduced scaling, possibly high enough to stabilize resistive wall modes without external momentum input.",

author = "Rice, \{J. E.\} and A. Ince-Cushman and Degrassie, \{J. S.\} and Eriksson, \{L. G.\} and Y. Sakamoto and A. Scarabosio and A. Bortolon and Burrell, \{K. H.\} and Duval, \{B. P.\} and C. Fenzi-Bonizec and Greenwald, \{M. J.\} and Groebner, \{R. J.\} and Hoang, \{G. T.\} and Y. Koide and Marmar, \{E. S.\} and A. Pochelon and Y. Podpaly",

year = "2007",

doi = "10.1088/0029-5515/47/11/025",

language = "American English",

volume = "47",

pages = "1618--1624",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing Ltd.",

number = "11",

}

Rice, JE, Ince-Cushman, A, Degrassie, JS, Eriksson, LG, Sakamoto, Y, Scarabosio, A, Bortolon, A, Burrell, KH, Duval, BP, Fenzi-Bonizec, C, Greenwald, MJ, Groebner, RJ, Hoang, GT, Koide, Y, Marmar, ES, Pochelon, A & Podpaly, Y 2007, 'Inter-machine comparison of intrinsic toroidal rotation in tokamaks', Nuclear Fusion, vol. 47, no. 11, pp. 1618-1624. https://doi.org/10.1088/0029-5515/47/11/025

TY - JOUR

T1 - Inter-machine comparison of intrinsic toroidal rotation in tokamaks

AU - Rice, J. E.

AU - Ince-Cushman, A.

AU - Degrassie, J. S.

AU - Eriksson, L. G.

AU - Sakamoto, Y.

AU - Scarabosio, A.

AU - Bortolon, A.

AU - Burrell, K. H.

AU - Duval, B. P.

AU - Fenzi-Bonizec, C.

AU - Greenwald, M. J.

AU - Groebner, R. J.

AU - Hoang, G. T.

AU - Koide, Y.

AU - Marmar, E. S.

AU - Pochelon, A.

AU - Podpaly, Y.

PY - 2007

Y1 - 2007

N2 - Parametric scalings of the intrinsic (spontaneous, with no external momentum input) toroidal rotation observed on a large number of tokamaks have been combined with an eye towards revealing the underlying mechanism(s) and extrapolation to future devices. The intrinsic rotation velocity has been found to increase with plasma stored energy or pressure in JET, Alcator C-Mod, Tore Supra, DIII-D, JT-60U and TCV, and to decrease with increasing plasma current in some of these cases. Use of dimensionless parameters has led to a roughly unified scaling with MA ∝ βN, although a variety of Mach numbers works fairly well; scalings of the intrinsic rotation velocity with normalized gyro-radius or collisionality show no correlation. Whether this suggests the predominant role of MHD phenomena such as ballooning transport over turbulent processes in driving the rotation remains an open question. For an ITER discharge with βN = 2.6, an intrinsic rotation Alfven Mach number of MA ≃ 0.02 may be expected from the above deduced scaling, possibly high enough to stabilize resistive wall modes without external momentum input.

AB - Parametric scalings of the intrinsic (spontaneous, with no external momentum input) toroidal rotation observed on a large number of tokamaks have been combined with an eye towards revealing the underlying mechanism(s) and extrapolation to future devices. The intrinsic rotation velocity has been found to increase with plasma stored energy or pressure in JET, Alcator C-Mod, Tore Supra, DIII-D, JT-60U and TCV, and to decrease with increasing plasma current in some of these cases. Use of dimensionless parameters has led to a roughly unified scaling with MA ∝ βN, although a variety of Mach numbers works fairly well; scalings of the intrinsic rotation velocity with normalized gyro-radius or collisionality show no correlation. Whether this suggests the predominant role of MHD phenomena such as ballooning transport over turbulent processes in driving the rotation remains an open question. For an ITER discharge with βN = 2.6, an intrinsic rotation Alfven Mach number of MA ≃ 0.02 may be expected from the above deduced scaling, possibly high enough to stabilize resistive wall modes without external momentum input.

UR - https://www.scopus.com/pages/publications/38749114646

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U2 - 10.1088/0029-5515/47/11/025

DO - 10.1088/0029-5515/47/11/025

M3 - Article

SN - 0029-5515

VL - 47

SP - 1618

EP - 1624

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 11

ER -

Inter-machine comparison of intrinsic toroidal rotation in tokamaks

Abstract

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