The toroidicity-induced Alfvén eigenmode structure in DIII-D: Implications of soft x-ray and beam-ion loss data

E. M. Carolipio; W. W. Heidbrink; C. Z. Cheng; M. S. Chu; G. Y. Fu; A. Jaun; D. A. Spong; A. D. Turnbull; R. B. White

doi:10.1063/1.1378066

The toroidicity-induced Alfvén eigenmode structure in DIII-D: Implications of soft x-ray and beam-ion loss data

E. M. Carolipio, W. W. Heidbrink, C. Z. Cheng, M. S. Chu, G. Y. Fu, A. Jaun, D. A. Spong, A. D. Turnbull, R. B. White

Plasma Theory and Modeling

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

28 Scopus citations

Abstract

The internal structure of the toroidicity-induced Alfvén eigenmode (TAE) is studied by comparing soft x-ray profile and beam ion loss data taken during TAE activity in the DIII-D tokamak [W. W. Heidbrink et al., Nucl. Fusion 37, 1411 (1997)] with predictions from theories based on ideal magnetohydrodynamic (MHD), gyrofluid, and gyrokinetic models. The soft x-ray measurements indicate a centrally peaked eigenfunction, a feature which is closest to the gyrokinetic model's prediction. The beam ion losses are simulated using a guiding center code. In the simulations, the TAE eigenfunction calculated using the ideal MHD model acts as a perturbation to the equilibrium field. The predicted beam ion losses are an order of magnitude less than the observed ∼6%-8% losses at the peak experimental amplitude of δB_r/B₀≃2-5×10^-4.

Original language	English
Pages (from-to)	3391-3401
Number of pages	11
Journal	Physics of Plasmas
Volume	8
Issue number	7
DOIs	https://doi.org/10.1063/1.1378066
State	Published - Jul 2001

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1063/1.1378066

Cite this

@article{1cff13b6e027483080084e01240eaf9d,

title = "The toroidicity-induced Alfv{\'e}n eigenmode structure in DIII-D: Implications of soft x-ray and beam-ion loss data",

abstract = "The internal structure of the toroidicity-induced Alfv{\'e}n eigenmode (TAE) is studied by comparing soft x-ray profile and beam ion loss data taken during TAE activity in the DIII-D tokamak [W. W. Heidbrink et al., Nucl. Fusion 37, 1411 (1997)] with predictions from theories based on ideal magnetohydrodynamic (MHD), gyrofluid, and gyrokinetic models. The soft x-ray measurements indicate a centrally peaked eigenfunction, a feature which is closest to the gyrokinetic model's prediction. The beam ion losses are simulated using a guiding center code. In the simulations, the TAE eigenfunction calculated using the ideal MHD model acts as a perturbation to the equilibrium field. The predicted beam ion losses are an order of magnitude less than the observed ∼6%-8% losses at the peak experimental amplitude of δBr/B0≃2-5×10-4.",

author = "Carolipio, {E. M.} and Heidbrink, {W. W.} and Cheng, {C. Z.} and Chu, {M. S.} and Fu, {G. Y.} and A. Jaun and Spong, {D. A.} and Turnbull, {A. D.} and White, {R. B.}",

year = "2001",

month = jul,

doi = "10.1063/1.1378066",

language = "English",

volume = "8",

pages = "3391--3401",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics",

number = "7",

}

TY - JOUR

T1 - The toroidicity-induced Alfvén eigenmode structure in DIII-D

T2 - Implications of soft x-ray and beam-ion loss data

AU - Carolipio, E. M.

AU - Heidbrink, W. W.

AU - Cheng, C. Z.

AU - Chu, M. S.

AU - Fu, G. Y.

AU - Jaun, A.

AU - Spong, D. A.

AU - Turnbull, A. D.

AU - White, R. B.

PY - 2001/7

Y1 - 2001/7

N2 - The internal structure of the toroidicity-induced Alfvén eigenmode (TAE) is studied by comparing soft x-ray profile and beam ion loss data taken during TAE activity in the DIII-D tokamak [W. W. Heidbrink et al., Nucl. Fusion 37, 1411 (1997)] with predictions from theories based on ideal magnetohydrodynamic (MHD), gyrofluid, and gyrokinetic models. The soft x-ray measurements indicate a centrally peaked eigenfunction, a feature which is closest to the gyrokinetic model's prediction. The beam ion losses are simulated using a guiding center code. In the simulations, the TAE eigenfunction calculated using the ideal MHD model acts as a perturbation to the equilibrium field. The predicted beam ion losses are an order of magnitude less than the observed ∼6%-8% losses at the peak experimental amplitude of δBr/B0≃2-5×10-4.

AB - The internal structure of the toroidicity-induced Alfvén eigenmode (TAE) is studied by comparing soft x-ray profile and beam ion loss data taken during TAE activity in the DIII-D tokamak [W. W. Heidbrink et al., Nucl. Fusion 37, 1411 (1997)] with predictions from theories based on ideal magnetohydrodynamic (MHD), gyrofluid, and gyrokinetic models. The soft x-ray measurements indicate a centrally peaked eigenfunction, a feature which is closest to the gyrokinetic model's prediction. The beam ion losses are simulated using a guiding center code. In the simulations, the TAE eigenfunction calculated using the ideal MHD model acts as a perturbation to the equilibrium field. The predicted beam ion losses are an order of magnitude less than the observed ∼6%-8% losses at the peak experimental amplitude of δBr/B0≃2-5×10-4.

UR - http://www.scopus.com/inward/record.url?scp=0442291862&partnerID=8YFLogxK

U2 - 10.1063/1.1378066

DO - 10.1063/1.1378066

M3 - Article

AN - SCOPUS:0442291862

SN - 1070-664X

VL - 8

SP - 3391

EP - 3401

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 7

ER -

The toroidicity-induced Alfvén eigenmode structure in DIII-D: Implications of soft x-ray and beam-ion loss data

Abstract

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this