Comparison of the numerical modelling and experimental measurements of DIII-D separatrix displacements during H-modes with resonant magnetic perturbations

D. M. Orlov; R. A. Moyer; T. E. Evans; A. Wingen; R. J. Buttery; N. M. Ferraro; B. A. Grierson; D. Eldon; J. G. Watkins; R. Nazikian

doi:10.1088/0029-5515/54/9/093008

Comparison of the numerical modelling and experimental measurements of DIII-D separatrix displacements during H-modes with resonant magnetic perturbations

D. M. Orlov, R. A. Moyer, T. E. Evans, A. Wingen, R. J. Buttery, N. M. Ferraro, B. A. Grierson, D. Eldon, J. G. Watkins, R. Nazikian

Advanced Tokamak Physics

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

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Abstract

Numerical modelling of the plasma boundary position and its displacement due to external magnetic perturbations in DIII-D low-collisionality H-mode discharges is presented. The results of the vacuum model are compared to the experimental measurements for boundary displacements including Thomson scattering electron temperature T_e, charge exchange recombination spectroscopy, beam emission spectroscopy, soft x-ray, and divertor Langmuir probe measurements. Magnetically perturbed discharges with toroidal mode number n = 2 and n = 3 are studied. It is shown that the vacuum model predictions agree well with the measurements above and below the midplane, and disagree at the outer midplane in discharges where significant kink amplification is present. The role of the plasma response is studied using the two-fluid MHD code M3D-C¹, and the results are compared to the vacuum model showing that the plasma response model underestimates the boundary displacements.

Original language	English
Article number	093008
Journal	Nuclear Fusion
Volume	54
Issue number	9
DOIs	https://doi.org/10.1088/0029-5515/54/9/093008
State	Published - Aug 15 2014

Keywords

ELM (edge localized modes)
ELM control
RMP (resonant magnetic perturbation)
non-axisymmetric magnetic perturbations
stochastic magnetic field lines
tokamaks

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10.1088/0029-5515/54/9/093008

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Orlov, D. M., Moyer, R. A., Evans, T. E., Wingen, A., Buttery, R. J., Ferraro, N. M., Grierson, B. A., Eldon, D., Watkins, J. G., & Nazikian, R. (2014). Comparison of the numerical modelling and experimental measurements of DIII-D separatrix displacements during H-modes with resonant magnetic perturbations. Nuclear Fusion, 54(9), Article 093008. https://doi.org/10.1088/0029-5515/54/9/093008

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title = "Comparison of the numerical modelling and experimental measurements of DIII-D separatrix displacements during H-modes with resonant magnetic perturbations",

abstract = "Numerical modelling of the plasma boundary position and its displacement due to external magnetic perturbations in DIII-D low-collisionality H-mode discharges is presented. The results of the vacuum model are compared to the experimental measurements for boundary displacements including Thomson scattering electron temperature Te, charge exchange recombination spectroscopy, beam emission spectroscopy, soft x-ray, and divertor Langmuir probe measurements. Magnetically perturbed discharges with toroidal mode number n = 2 and n = 3 are studied. It is shown that the vacuum model predictions agree well with the measurements above and below the midplane, and disagree at the outer midplane in discharges where significant kink amplification is present. The role of the plasma response is studied using the two-fluid MHD code M3D-C1, and the results are compared to the vacuum model showing that the plasma response model underestimates the boundary displacements.",

keywords = "ELM (edge localized modes), ELM control, RMP (resonant magnetic perturbation), non-axisymmetric magnetic perturbations, stochastic magnetic field lines, tokamaks",

author = "Orlov, {D. M.} and Moyer, {R. A.} and Evans, {T. E.} and A. Wingen and Buttery, {R. J.} and Ferraro, {N. M.} and Grierson, {B. A.} and D. Eldon and Watkins, {J. G.} and R. Nazikian",

note = "Publisher Copyright: {\textcopyright} 2014 IAEA, Vienna.",

year = "2014",

month = aug,

day = "15",

doi = "10.1088/0029-5515/54/9/093008",

language = "English",

volume = "54",

journal = "Nuclear Fusion",

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T1 - Comparison of the numerical modelling and experimental measurements of DIII-D separatrix displacements during H-modes with resonant magnetic perturbations

AU - Orlov, D. M.

AU - Moyer, R. A.

AU - Evans, T. E.

AU - Wingen, A.

AU - Buttery, R. J.

AU - Ferraro, N. M.

AU - Grierson, B. A.

AU - Eldon, D.

AU - Watkins, J. G.

AU - Nazikian, R.

PY - 2014/8/15

Y1 - 2014/8/15

N2 - Numerical modelling of the plasma boundary position and its displacement due to external magnetic perturbations in DIII-D low-collisionality H-mode discharges is presented. The results of the vacuum model are compared to the experimental measurements for boundary displacements including Thomson scattering electron temperature Te, charge exchange recombination spectroscopy, beam emission spectroscopy, soft x-ray, and divertor Langmuir probe measurements. Magnetically perturbed discharges with toroidal mode number n = 2 and n = 3 are studied. It is shown that the vacuum model predictions agree well with the measurements above and below the midplane, and disagree at the outer midplane in discharges where significant kink amplification is present. The role of the plasma response is studied using the two-fluid MHD code M3D-C1, and the results are compared to the vacuum model showing that the plasma response model underestimates the boundary displacements.

AB - Numerical modelling of the plasma boundary position and its displacement due to external magnetic perturbations in DIII-D low-collisionality H-mode discharges is presented. The results of the vacuum model are compared to the experimental measurements for boundary displacements including Thomson scattering electron temperature Te, charge exchange recombination spectroscopy, beam emission spectroscopy, soft x-ray, and divertor Langmuir probe measurements. Magnetically perturbed discharges with toroidal mode number n = 2 and n = 3 are studied. It is shown that the vacuum model predictions agree well with the measurements above and below the midplane, and disagree at the outer midplane in discharges where significant kink amplification is present. The role of the plasma response is studied using the two-fluid MHD code M3D-C1, and the results are compared to the vacuum model showing that the plasma response model underestimates the boundary displacements.

KW - ELM (edge localized modes)

KW - ELM control

KW - RMP (resonant magnetic perturbation)

KW - non-axisymmetric magnetic perturbations

KW - stochastic magnetic field lines

KW - tokamaks

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U2 - 10.1088/0029-5515/54/9/093008

DO - 10.1088/0029-5515/54/9/093008

M3 - Article

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SN - 0029-5515

VL - 54

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 9

M1 - 093008

ER -

Comparison of the numerical modelling and experimental measurements of DIII-D separatrix displacements during H-modes with resonant magnetic perturbations

Abstract

Keywords

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