The toroidicity-induced Alfvén eigenmode structure in DIII-D: Implications of soft x-ray and beam-ion loss data

E. M. Carolipio, W. W. Heidbrink, C. Z. Cheng, M. S. Chu, G. Y. Fu, A. Jaun, D. A. Spong, A. D. Turnbull, R. B. White

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28 引文 斯高帕斯(Scopus)

摘要

The internal structure of the toroidicity-induced Alfvén eigenmode (TAE) is studied by comparing soft x-ray profile and beam ion loss data taken during TAE activity in the DIII-D tokamak [W. W. Heidbrink et al., Nucl. Fusion 37, 1411 (1997)] with predictions from theories based on ideal magnetohydrodynamic (MHD), gyrofluid, and gyrokinetic models. The soft x-ray measurements indicate a centrally peaked eigenfunction, a feature which is closest to the gyrokinetic model's prediction. The beam ion losses are simulated using a guiding center code. In the simulations, the TAE eigenfunction calculated using the ideal MHD model acts as a perturbation to the equilibrium field. The predicted beam ion losses are an order of magnitude less than the observed ∼6%-8% losses at the peak experimental amplitude of δBr/B0≃2-5×10-4.

原文English
頁(從 - 到)3391-3401
頁數11
期刊Physics of Plasmas
8
發行號7
DOIs
出版狀態Published - 2001 七月

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學

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