Interaction of Tearing Modes With Passive Structures in a Tokamak
نویسندگان
چکیده
In this work, a surface current plasma model is coupled to volume integral formulation for studying the interaction between tokamak tearing modes (TMs) and machine metallic structures surrounding plasma. By evaluating passive response on set of pickup probes, TMs' amplitude estimated.
منابع مشابه
Fast growing double tearing modes in a tokamak plasma
Configurations with nearby multiple resonant surfaces have broad spectra of linearly unstable coupled tearing modes with dominant high poloidal mode numbers m. This was recently shown for the case of multiple q = 1 resonances [Bierwage et al., Phys. Rev. Lett. 94 (6), 65001 (2005)]. In the present work, similar behavior is found for double tearing modes (DTM) on resonant surfaces with q ≥ 1. A ...
متن کاملExponentially growing tearing modes in Rijnhuizen Tokamak Project plasmas.
The local measurement of the island width w, around the resonant surface, allowed a direct test of the extended Rutherford model [P. H. Rutherford, PPPL Report-2277 (1985)], describing the evolution of radiation-induced tearing modes prior to disruptions of tokamak plasmas. It is found that this model accounts very well for the observed exponential growth and supports radiation losses as being ...
متن کاملMicro-tearing modes in the mega ampere spherical tokamak
Recent gyrokinetic stability calculations have revealed that the spherical tokamak is susceptible to tearing parity instabilities with length scales of a few ion Larmor radii perpendicular to the magnetic field lines. Here we investigate this ‘micro-tearing’ mode in greater detail to uncover its key characteristics and compare it with existing theoretical models of the phenomenon. This has been...
متن کاملStrong scattering of high power millimeter waves in tokamak plasmas with tearing modes.
In tokamak plasmas with a tearing mode, strong scattering of high power millimeter waves, as used for heating and noninductive current drive, is shown to occur. This new wave scattering phenomenon is shown to be related to the passage of the O point of a magnetic island through the high power heating beam. The density determines the detailed phasing of the scattered radiation relative to the O-...
متن کاملDrift-tearing magnetic islands in tokamak plasmas
A systematic fluid theory of nonlinear magnetic island dynamics in conventional low, large aspect-ratio, circular cross-section tokamak plasmas is developed using an extended magnetohydrodynamics model that incorporates diamagnetic flows, ion gyroviscosity, fast parallel electron heat transport, the ion sound wave, the drift wave, and average magnetic field-line curvature. The model excludes th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Magnetics
سال: 2021
ISSN: ['1941-0069', '0018-9464']
DOI: https://doi.org/10.1109/tmag.2021.3053637