Poster Q7S37, as presented at the Fortieth Annual Meeting of the American Physical Society Division of Plasma Physics, New Orleans, November 16-20, 1998. Abstract in Bull. American Phys. Soc. 43, 1877 (1998).
abstract:
We investigate the effects of various assumptions in an ITG-based transport
model on the predicted fusion power performance of various tokamak reactor
designs. Among other sources of variability, the effect of modifying the
IFS-PPPL model (originally based on gyrofluid simulations) to roughly fit
the lower turbulence levels of gyrokinetic simulations is shown. There is
a strong dependence on the assumed H-mode pedestal temperature. Various
models for the scaling of the pedestal temperature are
considered\footnote{M. Kotschenreuther, W. Dorland, et.al., Proc. 16th
Int. Conf. Plasma Physics and Control. Nucl. Fusion Res. (IAEA 1996);
F.W. Perkins et.al. ibid; T. Hatae et.al., Plasma Phys. Control. Fusion
{\bf 40} 1073 (1998).}, but they all share some common features that
suggest that performance might be improved significantly for compact,
higher field tokamak designs with stronger plasma
shaping\footnote{Y. Kamada et.al. Plasma Phys. Control. Fusion {\bf 38},
1387 (1996).} and density peaking, such as in ARIES-RS or similar designs.
However, more work is needed to be confident of these scalings.
This work supported by DoE Contract DE-AC02-76CH03073, the
Numerical Tokamak Turbulence Project, and NERSC computing resources.