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Investigation of Tearing Modes on the Spherical Tokamak Globus-M2 Using the Doppler Backscattering Method

open access: yesApplied Sciences, 2023
In this study, we observed magnetohydrodynamic (MHD) activity of the spherical tokamak Globus-M2 which led to a deterioration in plasma confinement, such as a transition from the H-mode to L-mode, or even disruption.
Alexander Yashin   +9 more
doaj   +3 more sources

Linear stability of tearing modes [PDF]

open access: yesPhysics of Fluids, 1986
This paper examines the stability of tearing modes in a sheared slab when the width of the tearing layer is much smaller than the ion Larmor radius. The ion response is nonlocal, and the quasineutrality retains its full integal form. An expansion procedure is introduced to solve the quasineutrality equation in powers of the width of the tearing layer ...
Taik Soo Hahm, S C Cowley, R M Kulsrud
exaly   +3 more sources

Resistive wall tearing mode disruptions

open access: yesNuclear Fusion
This paper deals with resistive wall tearing mode (RWTM) disruptions. RWTMs are closely related to resistive wall modes. RWTMs are tearing modes whose linear and nonlinear behavior is strongly dependent on the resistive wall outside the plasma.
H.R. Strauss, B.E. Chapman, B.C. Lyons
doaj   +3 more sources

Influence of two simultaneous driven currents on multiple tearing modes in tokamak plasmas

open access: yesAIP Advances, 2022
The influence of two driven currents simultaneously and respectively imposed on the m/n = 2/1 and 3/2 resistive tearing modes in tokamak plasmas is researched by using a three-dimensional toroidal magnetohydrodynamic code CLT. The simulation results show
Yemin Zhang   +5 more
doaj   +1 more source

The spherical tearing mode [PDF]

open access: yesGeophysical Research Letters, 2004
The spherical tearing mode is the three‐dimensional analog of the classical tearing mode in two dimensions. In three dimensions, loops of field lines connecting magnetic nulls play the role of separatrices. A numerical study of the tearing instability of a three‐dimensional analytic equilibrium containing a closed spherical tearing surface composed of ...
S. Hu   +3 more
openaire   +1 more source

MHD stability of negative triangularity DIII-D plasmas

open access: yesNuclear Fusion, 2023
Negative triangularity (NT) experiments in DIII-D point to an emergent reactor scenario free of sawteeth, endowed with benign, nondisruptive n = 2 tearing modes, which experience q _min $ \geqslant $ 1 similar to the positive triangularity hybrid ...
W. Boyes   +6 more
doaj   +1 more source

A fundamental understanding of the unstable eigenmodes of double tearing instabilities in a shear slab geometry

open access: yesAIP Advances, 2020
Two types of unstable eigenmodes of resistive tearing instabilities, namely, symmetric and anti-symmetric modes, in a double current sheet configuration are analyzed by means of both an eigenvalue solver and initial value simulation.
L. Wei, F. Yu, H. J. Ren, Z. X. Wang
doaj   +1 more source

Study on tearing tests and the determination of fracture toughness of PVC-coated fabric

open access: yesJournal of Industrial Textiles, 2022
In this study, detailed uniaxial in-plane tearing tests including uniaxial central, single-edge notched, and trapezoidal tearing tests of a type of polyvinylchloride (PVC)-coated polyester fiber fabric were conducted.
Han Bao, Minger Wu, Xubo Zhang
doaj   +1 more source

Nonlinear study of tearing modes and plasma flows around magnetic islands in tokamak plasmas

open access: yesAIP Advances, 2020
The behavior of non-linear tearing modes and the plasma flows around magnetic islands is studied numerically in a cylindrical geometry using the method of reduced magneto-hydro-dynamic simulation.
Jizong Yang   +6 more
doaj   +1 more source

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