On the p scaling of intrinsic rotation in C-Mod plasmas with edge transport barriers

J. E. Rice; J. W. Hughes; P. H. Diamond; N. Cao; M. A. Chilenski; A. E. Hubbard; J. H. Irby; Y. Kosuga; Y. Lin; I. W. Metcalf; M. L. Reinke; E. A. Tolman; M. M. Victora; S. M. Wolfe; S. J. Wukitch

doi:10.1088/1741-4326/aa7b44

On the p scaling of intrinsic rotation in C-Mod plasmas with edge transport barriers

J. E. Rice, J. W. Hughes, P. H. Diamond, N. Cao, M. A. Chilenski, A. E. Hubbard, J. H. Irby, Y. Kosuga, Y. Lin, I. W. Metcalf, M. L. Reinke, E. A. Tolman, M. M. Victora, S. M. Wolfe, S. J. Wukitch

Division of Nuclear Fusion Dynamics

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

6 Citations (Scopus)

Abstract

Changes in the core intrinsic toroidal rotation velocity following L- to H- and L- to I-mode transitions have been investigated in Alcator C-Mod tokamak plasmas. The magnitude of the co-current rotation increments is found to increase with the pedestal temperature gradient and q95, and to decrease with toroidal magnetic field. These results are captured quantitatively by a model of fluctuation entropy balance which gives the Mach number M_i ≃= -rfpag∗/2L_s/L_T∇Tq95/BT in an ITG turbulence dominant regime. The agreement between experiment and theory gives confidence for extrapolation to future devices in similar operational regimes. Core thermal Mach numbers of ∼0.07 and ∼0.2 are expected for ITER and ARC, respectively.

Original language	English
Article number	116004
Journal	Nuclear Fusion
Volume	57
Issue number	11
DOIs	https://doi.org/10.1088/1741-4326/aa7b44
Publication status	Published - Jul 28 2017

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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10.1088/1741-4326/aa7b44

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Rice, J. E., Hughes, J. W., Diamond, P. H., Cao, N., Chilenski, M. A., Hubbard, A. E., Irby, J. H., Kosuga, Y., Lin, Y., Metcalf, I. W., Reinke, M. L., Tolman, E. A., Victora, M. M., Wolfe, S. M., & Wukitch, S. J. (2017). On the p scaling of intrinsic rotation in C-Mod plasmas with edge transport barriers. Nuclear Fusion, 57(11), Article 116004. https://doi.org/10.1088/1741-4326/aa7b44

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title = "On the p scaling of intrinsic rotation in C-Mod plasmas with edge transport barriers",

abstract = "Changes in the core intrinsic toroidal rotation velocity following L- to H- and L- to I-mode transitions have been investigated in Alcator C-Mod tokamak plasmas. The magnitude of the co-current rotation increments is found to increase with the pedestal temperature gradient and q95, and to decrease with toroidal magnetic field. These results are captured quantitatively by a model of fluctuation entropy balance which gives the Mach number Mi ≃= -rfpag∗/2Ls/LT∇Tq95/BT in an ITG turbulence dominant regime. The agreement between experiment and theory gives confidence for extrapolation to future devices in similar operational regimes. Core thermal Mach numbers of ∼0.07 and ∼0.2 are expected for ITER and ARC, respectively.",

author = "Rice, {J. E.} and Hughes, {J. W.} and Diamond, {P. H.} and N. Cao and Chilenski, {M. A.} and Hubbard, {A. E.} and Irby, {J. H.} and Y. Kosuga and Y. Lin and Metcalf, {I. W.} and Reinke, {M. L.} and Tolman, {E. A.} and Victora, {M. M.} and Wolfe, {S. M.} and Wukitch, {S. J.}",

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doi = "10.1088/1741-4326/aa7b44",

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T1 - On the p scaling of intrinsic rotation in C-Mod plasmas with edge transport barriers

AU - Rice, J. E.

AU - Hughes, J. W.

AU - Diamond, P. H.

AU - Cao, N.

AU - Chilenski, M. A.

AU - Hubbard, A. E.

AU - Irby, J. H.

AU - Kosuga, Y.

AU - Lin, Y.

AU - Metcalf, I. W.

AU - Reinke, M. L.

AU - Tolman, E. A.

AU - Victora, M. M.

AU - Wolfe, S. M.

AU - Wukitch, S. J.

PY - 2017/7/28

Y1 - 2017/7/28

N2 - Changes in the core intrinsic toroidal rotation velocity following L- to H- and L- to I-mode transitions have been investigated in Alcator C-Mod tokamak plasmas. The magnitude of the co-current rotation increments is found to increase with the pedestal temperature gradient and q95, and to decrease with toroidal magnetic field. These results are captured quantitatively by a model of fluctuation entropy balance which gives the Mach number Mi ≃= -rfpag∗/2Ls/LT∇Tq95/BT in an ITG turbulence dominant regime. The agreement between experiment and theory gives confidence for extrapolation to future devices in similar operational regimes. Core thermal Mach numbers of ∼0.07 and ∼0.2 are expected for ITER and ARC, respectively.

AB - Changes in the core intrinsic toroidal rotation velocity following L- to H- and L- to I-mode transitions have been investigated in Alcator C-Mod tokamak plasmas. The magnitude of the co-current rotation increments is found to increase with the pedestal temperature gradient and q95, and to decrease with toroidal magnetic field. These results are captured quantitatively by a model of fluctuation entropy balance which gives the Mach number Mi ≃= -rfpag∗/2Ls/LT∇Tq95/BT in an ITG turbulence dominant regime. The agreement between experiment and theory gives confidence for extrapolation to future devices in similar operational regimes. Core thermal Mach numbers of ∼0.07 and ∼0.2 are expected for ITER and ARC, respectively.

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U2 - 10.1088/1741-4326/aa7b44

DO - 10.1088/1741-4326/aa7b44

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SN - 0029-5515

VL - 57

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 11

M1 - 116004

ER -

On the p scaling of intrinsic rotation in C-Mod plasmas with edge transport barriers

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