Helical temperature perturbations associated with radially asymmetric magnetic island chains in tokamak plasmas
- Univ. of Texas, Austin, TX (United States). Dept. of Physics, Inst. for Fusion Studies
The simple analysis of Rutherford is generalized in order to incorporate radial magnetic island asymmetry into the nonlinear theory of tearing mode stability in a low-β, large aspect-ratio, quasi-cylindrical, tokamak plasma. The calculation is restricted to cases in which the radial shifts of the island X- and O-points are (almost) equal and opposite. For the sake of simplicity, the calculation concentrates on a particular (but fairly general) class of radially asymmetric island magnetic flux-surfaces that can all be mapped to the same symmetric flux-surfaces by means of a suitable coordinate transform. Finally, the combination of island asymmetry (in which the radial shifts of the X- and O-points are almost equal and opposite) and temperature-induced changes in the inductive current profile in the immediate vicinity of the island is found to have no effect on tearing mode stability.
- Research Organization:
- Univ. of Texas, Austin, TX (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- FG02-04ER54742; FG02-04ER-54742
- OSTI ID:
- 1535289
- Alternate ID(s):
- OSTI ID: 1334546
- Journal Information:
- Physics of Plasmas, Vol. 23, Issue 12; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Role of thermal conduction on resistive tearing mode in Tokamaks
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journal | June 2019 |
Influence of m / n = 2/1 magnetic islands on perpendicular flows and turbulence in HL-2A Ohmic plasmas
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journal | December 2017 |
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