Plasma response impact on RMP divertor footprint modeling for KSTAR

H. Frerichs; J. Van Blarcum; S. M. Yang; J. K. Park; N. C. Logan; Y. Feng; O. Schmitz

doi:10.1016/j.nme.2023.101380

Plasma response impact on RMP divertor footprint modeling for KSTAR

H. Frerichs
, J. Van Blarcum
, S. M. Yang
, J. K. Park
, N. C. Logan
, Y. Feng
, O. Schmitz

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

9 Scopus citations

Abstract

The striation pattern of heat loads on the divertor targets is determined by the plasma response to external resonant magnetic perturbations (RMPs) applied for suppression of edge localized modes (ELMs). Ideal and kinetic plasma response analysis with the general perturbed equilibrium code (GPEC) has shown that the extent of this striation pattern is very sensitive to the radial location of equilibrium truncation in GPEC, and that a significantly smaller extent is found if the equilibrium is truncated closer to the separatrix. Depending on the choice of truncation, it is shown in EMC3-EIRENE simulations that the peak heat load can be reduced by adjusting RMP coil parameters (phase, amplitude) within a window that is consistent with ELM suppression.

Original language	English (US)
Article number	101380
Journal	Nuclear Materials and Energy
Volume	34
DOIs	https://doi.org/10.1016/j.nme.2023.101380
State	Published - Mar 2023

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Materials Science (miscellaneous)
Nuclear Energy and Engineering

Keywords

Divertor heat load striations
Plasma response
Resonant magnetic perturbations

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10.1016/j.nme.2023.101380

Cite this

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title = "Plasma response impact on RMP divertor footprint modeling for KSTAR",

abstract = "The striation pattern of heat loads on the divertor targets is determined by the plasma response to external resonant magnetic perturbations (RMPs) applied for suppression of edge localized modes (ELMs). Ideal and kinetic plasma response analysis with the general perturbed equilibrium code (GPEC) has shown that the extent of this striation pattern is very sensitive to the radial location of equilibrium truncation in GPEC, and that a significantly smaller extent is found if the equilibrium is truncated closer to the separatrix. Depending on the choice of truncation, it is shown in EMC3-EIRENE simulations that the peak heat load can be reduced by adjusting RMP coil parameters (phase, amplitude) within a window that is consistent with ELM suppression.",

keywords = "Divertor heat load striations, Plasma response, Resonant magnetic perturbations",

author = "H. Frerichs and \{Van Blarcum\}, J. and Yang, \{S. M.\} and Park, \{J. K.\} and Logan, \{N. C.\} and Y. Feng and O. Schmitz",

note = "Publisher Copyright: {\textcopyright} 2023",

year = "2023",

month = mar,

doi = "10.1016/j.nme.2023.101380",

language = "English (US)",

volume = "34",

journal = "Nuclear Materials and Energy",

issn = "2352-1791",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Plasma response impact on RMP divertor footprint modeling for KSTAR

AU - Frerichs, H.

AU - Van Blarcum, J.

AU - Yang, S. M.

AU - Park, J. K.

AU - Logan, N. C.

AU - Feng, Y.

AU - Schmitz, O.

PY - 2023/3

Y1 - 2023/3

N2 - The striation pattern of heat loads on the divertor targets is determined by the plasma response to external resonant magnetic perturbations (RMPs) applied for suppression of edge localized modes (ELMs). Ideal and kinetic plasma response analysis with the general perturbed equilibrium code (GPEC) has shown that the extent of this striation pattern is very sensitive to the radial location of equilibrium truncation in GPEC, and that a significantly smaller extent is found if the equilibrium is truncated closer to the separatrix. Depending on the choice of truncation, it is shown in EMC3-EIRENE simulations that the peak heat load can be reduced by adjusting RMP coil parameters (phase, amplitude) within a window that is consistent with ELM suppression.

AB - The striation pattern of heat loads on the divertor targets is determined by the plasma response to external resonant magnetic perturbations (RMPs) applied for suppression of edge localized modes (ELMs). Ideal and kinetic plasma response analysis with the general perturbed equilibrium code (GPEC) has shown that the extent of this striation pattern is very sensitive to the radial location of equilibrium truncation in GPEC, and that a significantly smaller extent is found if the equilibrium is truncated closer to the separatrix. Depending on the choice of truncation, it is shown in EMC3-EIRENE simulations that the peak heat load can be reduced by adjusting RMP coil parameters (phase, amplitude) within a window that is consistent with ELM suppression.

KW - Divertor heat load striations

KW - Plasma response

KW - Resonant magnetic perturbations

UR - https://www.scopus.com/pages/publications/85149057651

UR - https://www.scopus.com/pages/publications/85149057651#tab=citedBy

U2 - 10.1016/j.nme.2023.101380

DO - 10.1016/j.nme.2023.101380

M3 - Article

AN - SCOPUS:85149057651

SN - 2352-1791

VL - 34

JO - Nuclear Materials and Energy

JF - Nuclear Materials and Energy

M1 - 101380

ER -

Plasma response impact on RMP divertor footprint modeling for KSTAR

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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