Tokamak transport modeling scenarios, including ITER [ITER Physics Basis Editors, Nucl. Fusion 39, 2137 (1999)] performance predictions, are based exclusively on reduced models for core thermal and particle transport. The reason for this is simple: computational cost. A typical modeling scenario may require the evaluation of thousands of individual transport fluxes (local transport models calculate the energy and particle fluxes across a specified flux surface given fixed profiles). Despite continuous advances in direct gyrokinetic simulation, the cost of an individual simulation remains so high that direct gyrokinetic transport calculations have been avoided. By developing a steady-state iteration scheme suitable for direct gyrokinetic and neoclassical simulations, we can now compute steady-state temperature profiles for DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] plasmas given known plasma sources. The new code, TGYRO, encapsulates the GYRO [J. Candy and R. E. Waltz, J. Comput. Phys. 186, 545 (2003)] code, for turbulent transport, and the NEO [E. A. Belli and J. Candy, Plasma Phys. Controlled Fusion 50, 095010 (2008)] code, for kinetic neoclassical transport. Results for DIII-D -mode discharge 128913 are given, with computational and experimental results consistent in the region .
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June 2009
Letter|
June 26 2009
Tokamak profile prediction using direct gyrokinetic and neoclassical simulation
J. Candy;
J. Candy
1
General Atomics
, San Diego, California 92186, USA
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C. Holland;
C. Holland
2
University of California–San Diego
, La Jolla, California 92093, USA
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R. E. Waltz;
R. E. Waltz
1
General Atomics
, San Diego, California 92186, USA
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M. R. Fahey;
M. R. Fahey
3
Oak Ridge National Laboratory
, Oak Ridge, Tennessee 37831, USA
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a)
URL: http://fusion.gat.com/theory/gyro.
Phys. Plasmas 16, 060704 (2009)
Article history
Received:
May 11 2009
Accepted:
June 11 2009
Citation
J. Candy, C. Holland, R. E. Waltz, M. R. Fahey, E. Belli; Tokamak profile prediction using direct gyrokinetic and neoclassical simulation. Phys. Plasmas 1 June 2009; 16 (6): 060704. https://doi.org/10.1063/1.3167820
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