Gyrokinetic {delta}f simulation of the collisionless and semicollisional tearing mode instability
- University of Colorado, Boulder, Colorado 80309 (United States)
The evolution of collisionless and semicollisional tearing mode instabilities is studied using an electromagnetic gyrokinetic {delta}f particle-in-cell simulation model. Drift-kinetic electrons are used. Linear eigenmode analysis is presented for the case of fixed ions and there is excellent agreement with simulation. A double peaked eigenmode structure is seen indicative of a positive {delta}{sup '}. Nonlinear evolution of a magnetic island is studied and the results compare well with existing theory in terms of saturation level and electron bounce oscillations. Electron-ion collisions are included to study the semicollisional regime. The algebraic growth stage is observed and compares favorably with theory. Nonlinear saturation following the algebraic stage is observed.
- OSTI ID:
- 20657955
- Journal Information:
- Physics of Plasmas, Vol. 12, Issue 1; Other Information: DOI: 10.1063/1.1827216; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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