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Stabilization of Alfvén Eigenmodes in DIII-D via Controlled Energetic Ion Density Ramp and Validation of Theory and Simulations.
Tang, S X; Carter, T A; Crocker, N A; Heidbrink, W W; Lestz, J B; Pinsker, R I; Thome, K E; Van Zeeland, M A; Belova, E V.
Afiliación
  • Tang SX; University of California, Los Angeles, Los Angeles, California 90095, USA.
  • Carter TA; University of California, Los Angeles, Los Angeles, California 90095, USA.
  • Crocker NA; University of California, Los Angeles, Los Angeles, California 90095, USA.
  • Heidbrink WW; University of California, Irvine, Irvine, California 92697, USA.
  • Lestz JB; University of California, Irvine, Irvine, California 92697, USA.
  • Pinsker RI; General Atomics, San Diego, California 92121, USA.
  • Thome KE; General Atomics, San Diego, California 92121, USA.
  • Van Zeeland MA; General Atomics, San Diego, California 92121, USA.
  • Belova EV; Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, USA.
Phys Rev Lett ; 126(15): 155001, 2021 Apr 16.
Article en En | MEDLINE | ID: mdl-33929259
Fast-ion driven Alfvén waves with frequency close to the ion cyclotron frequency (f=0.58f_{ci}) excited by energetic ions from a neutral beam are stabilized via a controlled energetic ion density ramp for the first time in a fusion research plasma. The scaling of wave amplitude with injection rate is consistent with theory for single mode collisional saturation near marginal stability. The wave is identified as a shear-polarized global Alfvén eigenmode excited by Doppler-shifted cyclotron resonance with fast ions with sub-Alfvénic energetic ions, a first in fusion research plasmas.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos
Texto completo
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PubMed Links
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos