Kimin Kim, Jisung Kang, Tongnyeol Rhee, Minho Kim, Junghee Kim
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引用次数: 0
Abstract
We report the experimental examination of non-axisymmetric (3D) magnetic field for control of Alfvén eigenmodes (AEs) in KSTAR. Application of the phase-sweeping n=1 3D magnetic field identifies the effective 3D field phase and threshold amplitude for suppression of the toroidal Alfvén eigenmodes (TAE). Such observations indicate at least two conditions of 3D field phase and amplitude should be satisfied for the AE suppression. The phase window of AE suppression is largely resonant and thereby overlapped with that of mode locking, while the threshold of mode locking is slightly higher than that of AE suppression, which implies narrow 3D configuration window for AE suppression. Numerical analyses on the AE stability and fast ion phase-space transport suggest that key mechanism of the AE suppression is the reduction of the AE drive through redistribution of fast ion phase-space distribution by strong resonant interactions of the fast ions with the 3D magnetic field.
期刊介绍：
ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric.
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