Effects of magnetic islands on drift wave instability
- Peking Univ., Beijing (China); Univ. of California, Irvine, CA (United States)
- Univ. of California, Irvine, CA (United States)
- Peking Univ., Beijing (China)
Here, magnetic islands have been utilized in the gyrokinetic toroidal code to examine the effects of the islands on microturbulence. The pressure profile flattening is verified in the simulation with the islands. Simulations of ion temperature gradient instability find that different toroidal modes are linearly coupled together and that toroidal spectra become broader when the island width increases. The real frequencies and growth rates of different toroidal modes approach each other with the averaged value independent of the island width. The linear mode structures are enhanced at the island separatrices and weakened at the island centers, consistent with the flattening of the pressure profile inside the islands.
- Research Organization:
- Univ. of California, Oakland, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Univ. of California, Irvine, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231; AC05-00OR22725; FG02-07ER54916; SC0010416
- OSTI ID:
- 1565334
- Alternate ID(s):
- OSTI ID: 1226604
- Journal Information:
- Physics of Plasmas, Vol. 21, Issue 12; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Gyrokinetic simulation study of magnetic island effects on neoclassical physics and micro-instabilities in a realistic KSTAR plasma
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journal | May 2018 |
Loss of bootstrap current in vicinity of magnetic islands
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journal | May 2019 |
Global gyrokinetic simulation of microturbulence with kinetic electrons in the presence of magnetic island in tokamak
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journal | May 2019 |
Effects of magnetic islands on bootstrap current in toroidal plasmas
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journal | December 2016 |
Gyrokinetic simulations of nonlinear interactions between magnetic islands and microturbulence
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journal | September 2019 |
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