Nonlinear growth of magnetic islands by passing fast ions in NSTX

J. Yang; E. D. Fredrickson; M. Podestà; F. M. Poli

doi:10.1088/1361-6587/ac7970

Nonlinear growth of magnetic islands by passing fast ions in NSTX

J. Yang, E. D. Fredrickson, M. Podestà, F. M. Poli

PPPL NSTX

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6 Scopus citations

Abstract

The growth of magnetic islands in NSTX is modeled successfully, with the consideration of passing fast ions. It is shown that a good quantitative agreement between simulation and experimental measurement can be achieved when the uncompensated cross-field current induced by passing fast ions is included in the island growth model. The fast ion parameters, along with other equilibrium parameters, are obtained self-consistently using the TRANSP code with the assumptions of the 'kick' model (Podestà et al 2017 Plasma Phys. Control. Fusion 59 095008). The results show that fast ions can contribute to overcoming the stabilizing effect of polarization current for magnetic island growth.

Original language	English (US)
Article number	095005
Journal	Plasma Physics and Controlled Fusion
Volume	64
Issue number	9
DOIs	https://doi.org/10.1088/1361-6587/ac7970
State	Published - Sep 2022

All Science Journal Classification (ASJC) codes

Nuclear Energy and Engineering
Condensed Matter Physics

Keywords

NSTX
fast ions
kick model
neoclassical tearing modes

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10.1088/1361-6587/ac7970

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title = "Nonlinear growth of magnetic islands by passing fast ions in NSTX",

abstract = "The growth of magnetic islands in NSTX is modeled successfully, with the consideration of passing fast ions. It is shown that a good quantitative agreement between simulation and experimental measurement can be achieved when the uncompensated cross-field current induced by passing fast ions is included in the island growth model. The fast ion parameters, along with other equilibrium parameters, are obtained self-consistently using the TRANSP code with the assumptions of the 'kick' model (Podest{\`a} et al 2017 Plasma Phys. Control. Fusion 59 095008). The results show that fast ions can contribute to overcoming the stabilizing effect of polarization current for magnetic island growth.",

keywords = "NSTX, fast ions, kick model, neoclassical tearing modes",

author = "J. Yang and Fredrickson, \{E. D.\} and M. Podest{\`a} and Poli, \{F. M.\}",

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doi = "10.1088/1361-6587/ac7970",

language = "English (US)",

volume = "64",

journal = "Plasma Physics and Controlled Fusion",

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T1 - Nonlinear growth of magnetic islands by passing fast ions in NSTX

AU - Yang, J.

AU - Fredrickson, E. D.

AU - Podestà, M.

AU - Poli, F. M.

PY - 2022/9

Y1 - 2022/9

N2 - The growth of magnetic islands in NSTX is modeled successfully, with the consideration of passing fast ions. It is shown that a good quantitative agreement between simulation and experimental measurement can be achieved when the uncompensated cross-field current induced by passing fast ions is included in the island growth model. The fast ion parameters, along with other equilibrium parameters, are obtained self-consistently using the TRANSP code with the assumptions of the 'kick' model (Podestà et al 2017 Plasma Phys. Control. Fusion 59 095008). The results show that fast ions can contribute to overcoming the stabilizing effect of polarization current for magnetic island growth.

AB - The growth of magnetic islands in NSTX is modeled successfully, with the consideration of passing fast ions. It is shown that a good quantitative agreement between simulation and experimental measurement can be achieved when the uncompensated cross-field current induced by passing fast ions is included in the island growth model. The fast ion parameters, along with other equilibrium parameters, are obtained self-consistently using the TRANSP code with the assumptions of the 'kick' model (Podestà et al 2017 Plasma Phys. Control. Fusion 59 095008). The results show that fast ions can contribute to overcoming the stabilizing effect of polarization current for magnetic island growth.

KW - NSTX

KW - fast ions

KW - kick model

KW - neoclassical tearing modes

UR - https://www.scopus.com/pages/publications/85135097058

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DO - 10.1088/1361-6587/ac7970

M3 - Article

AN - SCOPUS:85135097058

SN - 0741-3335

VL - 64

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 9

M1 - 095005

ER -

Nonlinear growth of magnetic islands by passing fast ions in NSTX

Abstract

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