Experimental tests of paleoclassical transport
| Autor: | Harry McLean, J. S. Sarff, R.V. Budny, Dan Stutman, A.C. Leonard, Kevin Tritz, E. A. Lazarus, H.E. St. John, G. M. D. Hogeweij, T.C. Arlen, M.A. Mahdavi, Jay Anderson, T.H. Osborne, Stanley Kaye, Arnold H. Kritz, Martin Greenwald, Alexei Pankin, D. N. Hill, R. J. Groebner, C.C. Petty, C. M. Greenfield, Takaaki Fujita, Glenn Bateman, James D. Callen, Weston M. Stacey, E. J. Synakowski |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Nuclear Fusion. 47:1449-1457 |
| ISSN: | 1741-4326 0029-5515 |
| Popis: | Predictions of the recently developed paleoclassical transport model are compared with data from many toroidal plasma experiments: electron heat diffusivity in DIII-D, C-Mod and NSTX ohmic and near-ohmic plasmas; transport modeling of DIII-D ohmic-level discharges and of the RTP ECH 'stair-step' experiments with eITBs at low order rational surfaces; investigation of a strong eITB in JT-60U; H-mode Te edge pedestal properties in DIII-D; and electron heat diffusivities in non-tokamak experiments (NSTX/ST, MST/RFP, SSPX/spheromak). The radial electron heat transport predicted by the paleoclassical model is found to agree with a wide variety of ohmic-level experimental results and to set the lower limit (within a factor {approx} 2) for the radial electron heat transport in most resistive, current-carrying toroidal plasmas -- unless it is exceeded by fluctuation-induced transport, which often occurs in the edge of L-mode plasmas and when the electron temperature is high ({approx}>T{sub e}{sup crit} {approx}B{sup 2/3}{bar {alpha}}{sup 1/2} keV) because then paleoclassical transport becomes less than gyro-Bohm-level anomalous transport. |
| Databáze: | OpenAIRE |
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