Outside and inside a magnetic island: different perspectives to describe the same observables
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Plasma Physics"
DOI: 10.1017/s0022377824000941
Abstract: We compare three different approaches to describe a magnetic island in a generic toroidal plasma: (i) perturbative, from the perspective of the equilibrium magnetic field and the related action in a variational principle formulation; (ii)… read more here.
Keywords: island different; different perspectives; island; outside inside ... See more keywords
Electron acceleration in a secondary magnetic island formed during magnetic reconnection with a guide field
Sign Up to like & getrecommendations! Published in 2017 at "Physics of Plasmas"
DOI: 10.1063/1.4982813
Abstract: Secondary magnetic islands may be generated in the vicinity of an X line during magnetic reconnection. In this paper, by performing two-dimensional (2-D) particle-in-cell simulations, we investigate the role of a secondary magnetic island in… read more here.
Keywords: field; magnetic island; magnetic reconnection; secondary magnetic ... See more keywords
Global gyrokinetic simulation of microturbulence with kinetic electrons in the presence of magnetic island in tokamak
Sign Up to like & getrecommendations! Published in 2019 at "Physics of Plasmas"
DOI: 10.1063/1.5096962
Abstract: An electrostatic model has been formulated and implemented in the gyrokinetic toroidal code to study the nonlinear ion temperature gradient (ITG) turbulence in the presence of an n = 1, m = 2 magnetic island. The ions are described… read more here.
Keywords: mode; presence magnetic; magnetic island; point ... See more keywords
Generation of geodesic acoustic mode by nonlinear coupling of magnetic island and island-driven beta-induced Alfvén eigenmode
Sign Up to like & getrecommendations! Published in 2017 at "Plasma Physics and Controlled Fusion"
DOI: 10.1088/1361-6587/aa7646
Abstract: In a recent work, we have shown that the plasma flow around the magnetic island can excite the beta-induced Alfven eigenmode (BAE) (Marchenko et al 2016 Nucl. Fusion 56 106021). In the present communication, it… read more here.
Keywords: geodesic acoustic; magnetic island; acoustic mode; island ... See more keywords
Experimental inference of flux tunneling between magnetic island chains in tokamaks
Sign Up to like & getrecommendations! Published in 2021 at "Nuclear Fusion"
DOI: 10.1088/1741-4326/ac0411
Abstract: We report confinement bifurcations due to flux tunneling in magnetic islands in toroidal plasmas. This occurs in 2/1 islands, triggered by decoupling of non-overlapping adjacent 5/2 islands. While subject to electron cyclotron current drive (ECCD),… read more here.
Keywords: experimental inference; inference flux; flux; magnetic island ... See more keywords
New type of self-sustained divertor oscillation driven by magnetic island dynamics in Large Helical Device
Sign Up to like & getrecommendations! Published in 2024 at "Nuclear Fusion"
DOI: 10.1088/1741-4326/ad5367
Abstract: A new self-sustained divertor oscillation is discovered in magnetic island induced detached plasmas in the Large Helical Device. The divertor oscillation is found to be a self-regulation of the width of an edge magnetic island… read more here.
Keywords: self sustained; magnetic island; divertor oscillation;
Parametric decay of a gyrotron beam due to a rotating magnetic island in ASDEX Upgrade
Sign Up to like & getrecommendations! Published in 2024 at "Nuclear Fusion"
DOI: 10.1088/1741-4326/ad9847
Abstract: We investigate parametric decay instabilities (PDIs) of electron cyclotron waves due to a rotating neoclassical tearing mode (NTM) in ASDEX Upgrade. Strong scattering characteristic of PDIs is observed in a discharge where a (2,1) NTM… read more here.
Keywords: gyrotron; due rotating; parametric decay; magnetic island ... See more keywords
Bifurcation from L-mode to internal transport barrier triggered by a magnetic island in tokamak plasmas
Sign Up to like & getrecommendations! Published in 2025 at "Nuclear Fusion"
DOI: 10.1088/1741-4326/add27b
Abstract: Magnetic islands are believed to be responsible for triggering the internal transport barrier (ITB) around the rational surface and hence improves confinement in magnetic confinement fusion plasma, for more than two decades. Although some recent… read more here.
Keywords: itb; transport barrier; island; internal transport ... See more keywords
Self-Sustained Divertor Oscillation Driven by Magnetic Island Dynamics in Torus Plasma.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.128.085001
Abstract: A new type of self-sustained divertor oscillation is discovered in the Large Helical Device stellarator, where the peripheral plasma is detached from material diverters by means of externally applied perturbation fields. The divertor oscillation is… read more here.
Keywords: self sustained; divertor oscillation; divertor; magnetic island ... See more keywords