Effect of Energetic Trapped Particles Produced by ICRF Wave Heating on Sawtooth Instability in the DIII-D Tokamak

Journal Article · Fri Sep 28 00:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2800557· OSTI ID:21035932

Choi, M; Chan, V S; Chu, M S; Lao, L L; Pinsker, R I; Turnbull, A D ^[1]; Jeon, Y M ^[2]; Li, G; Ren, Q ^[3]

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1. General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)
2. Fellow, Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee (United States)
3. Chinese Academy of Sciences, Institute of Plasma Physics, Hefei Anhiu (China)

We evaluate the accuracy of the Porcelli sawtooth model using more realistic numerical models from the ORBIT-RF and GATO codes in DIII-D fast wave heating experiments. Simulation results confirm that the fast wave-induced energetic trapped particles may stabilize the sawtooth instability. The crucial kinetic stabilizing contribution strongly depends on both the experimentally reconstructed magnetic shear at the q = 1 surface and the calculated poloidal beta of energetic trapped particles inside the q = 1 surface.

• OSTI ID: 21035932
• Journal Information: AIP Conference Proceedings, Vol. 933, Issue 1; Conference: 17. topical conference on radio frequency power in plasmas, Clearwater, FL (United States), 7-9 May 2007; Other Information: DOI: 10.1063/1.2800557; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DOUBLET-3 DEVICE
ICR HEATING
ION CYCLOTRON-RESONANCE
MAGNETIC SURFACES
MAGNETOHYDRODYNAMICS
PLASMA
PLASMA INSTABILITY
PLASMA SIMULATION
RF SYSTEMS
SAWTOOTH OSCILLATIONS
SHEAR
TRAPPING