Gyrokinetic PIC Study on RMP Affected Neoclassical Transport in Toroidal Plasmas

Joseph X. Li; Toseo Moritaka; Ryutaro Kanno; Gakushi Kawamura; Robert Hager; C. S. Chang

doi:10.1585/PFR.20.1201019

Gyrokinetic PIC Study on RMP Affected Neoclassical Transport in Toroidal Plasmas

Joseph X. Li
, Toseo Moritaka
, Ryutaro Kanno
, Gakushi Kawamura
, Robert Hager
, C. S. Chang

PPPL Theory

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

1 Scopus citations

Abstract

In magnetically confined fusion plasmas, the breaking of ‘magnetic flux-surfaces’ due to resonant magnetic perturbations (RMPs) can generate magnetic islands and alter field topology to significantly impact plasma confinement and transport. This work investigates the effect of magnetic islands on neoclassical radial energy transport within the core plasma of an analytic circular tokamak using the XGC-S global gyrokinetic particle-in-cell code. Findings from our simulations revealed substantial enhancements in electron neoclassical radial energy diffusivity in and around the islands, in addition to a newly observed two-peak structure at the O/X-points and outer island boundary in the electron diffusivity profile.

Original language	English (US)
Article number	1201019
Journal	Plasma and Fusion Research
Volume	20
DOIs	https://doi.org/10.1585/PFR.20.1201019
State	Published - 2025

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

Keywords

RMP
XGC-S
magnetic islands
neoclassical transport
particle-in-cell

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10.1585/PFR.20.1201019

Cite this

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title = "Gyrokinetic PIC Study on RMP Affected Neoclassical Transport in Toroidal Plasmas",

abstract = "In magnetically confined fusion plasmas, the breaking of {\textquoteleft}magnetic flux-surfaces{\textquoteright} due to resonant magnetic perturbations (RMPs) can generate magnetic islands and alter field topology to significantly impact plasma confinement and transport. This work investigates the effect of magnetic islands on neoclassical radial energy transport within the core plasma of an analytic circular tokamak using the XGC-S global gyrokinetic particle-in-cell code. Findings from our simulations revealed substantial enhancements in electron neoclassical radial energy diffusivity in and around the islands, in addition to a newly observed two-peak structure at the O/X-points and outer island boundary in the electron diffusivity profile.",

keywords = "RMP, XGC-S, magnetic islands, neoclassical transport, particle-in-cell",

author = "Li, \{Joseph X.\} and Toseo Moritaka and Ryutaro Kanno and Gakushi Kawamura and Robert Hager and Chang, \{C. S.\}",

note = "Publisher Copyright: {\textcopyright} 2025 The Japan Society of Plasma Science and Nuclear Fusion Research",

year = "2025",

doi = "10.1585/PFR.20.1201019",

language = "English (US)",

volume = "20",

journal = "Plasma and Fusion Research",

issn = "1880-6821",

publisher = "Japan Society of Plasma Science and Nuclear Fusion Research",

}

TY - JOUR

T1 - Gyrokinetic PIC Study on RMP Affected Neoclassical Transport in Toroidal Plasmas

AU - Li, Joseph X.

AU - Moritaka, Toseo

AU - Kanno, Ryutaro

AU - Kawamura, Gakushi

AU - Hager, Robert

AU - Chang, C. S.

PY - 2025

Y1 - 2025

N2 - In magnetically confined fusion plasmas, the breaking of ‘magnetic flux-surfaces’ due to resonant magnetic perturbations (RMPs) can generate magnetic islands and alter field topology to significantly impact plasma confinement and transport. This work investigates the effect of magnetic islands on neoclassical radial energy transport within the core plasma of an analytic circular tokamak using the XGC-S global gyrokinetic particle-in-cell code. Findings from our simulations revealed substantial enhancements in electron neoclassical radial energy diffusivity in and around the islands, in addition to a newly observed two-peak structure at the O/X-points and outer island boundary in the electron diffusivity profile.

AB - In magnetically confined fusion plasmas, the breaking of ‘magnetic flux-surfaces’ due to resonant magnetic perturbations (RMPs) can generate magnetic islands and alter field topology to significantly impact plasma confinement and transport. This work investigates the effect of magnetic islands on neoclassical radial energy transport within the core plasma of an analytic circular tokamak using the XGC-S global gyrokinetic particle-in-cell code. Findings from our simulations revealed substantial enhancements in electron neoclassical radial energy diffusivity in and around the islands, in addition to a newly observed two-peak structure at the O/X-points and outer island boundary in the electron diffusivity profile.

KW - RMP

KW - XGC-S

KW - magnetic islands

KW - neoclassical transport

KW - particle-in-cell

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UR - https://www.scopus.com/pages/publications/105003804585#tab=citedBy

U2 - 10.1585/PFR.20.1201019

DO - 10.1585/PFR.20.1201019

M3 - Article

AN - SCOPUS:105003804585

SN - 1880-6821

VL - 20

JO - Plasma and Fusion Research

JF - Plasma and Fusion Research

M1 - 1201019

ER -

Gyrokinetic PIC Study on RMP Affected Neoclassical Transport in Toroidal Plasmas

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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