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Effect of magnetic islands on lower hybrid current drive in experimental advanced superconductor tokamak plasma with circular cross section
The lower hybrid wave current drive (LHCD) in the presence of magnetic islands in Tokamak plasma with the circular cross section is studied numerically. The emergence of magnetic island is considered as a perturbation characterized by the perturbed magnetic flux near the resonant surface. By taking...
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Published in: | Physics of plasmas 2014-09, Vol.21 (9) |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The lower hybrid wave current drive (LHCD) in the presence of magnetic islands in Tokamak plasma with the circular cross section is studied numerically. The emergence of magnetic island is considered as a perturbation characterized by the perturbed magnetic flux near the resonant surface. By taking the perturbed magnetic field into account in the lower hybrid simulation code, the wave propagation, power deposition, and current drive are investigated using typical Experimental Advanced Superconductor Tokamak (EAST) L- and H-modes discharge parameters. The simulation results show that the wave propagation, power deposition, and current drive are significantly affected by the existence of magnetic island. Due to the H-mode pedestal, the effect of magnetic islands on the LHCD in EAST H-mode discharge is more significant than that in the L-mode discharge. |
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ISSN: | 1070-664X 1089-7674 |
DOI: | 10.1063/1.4896247 |