(EX/P3-2) Experimental Tests of Paleoclassical Transport

J.D. Callen1), J.K. Anderson1), T.C. Arlen2)3), G. Bateman4), R.V. Budny5), T. Fujita6), C.M. Greenfield3), M. Greenwald7), R.J. Groebner3), D.N. Hill3), G.M.D. Hogeweij8), S.M. Kaye5), A.H. Kritz4), E.A. Lazarus9), A.C. Leonard3), M.A. Mahdavi3), H.S. McLean10), T.H. Osborne3), A.Y. Pankin4), C.C. Petty3), J.S. Sarff1), H.E. St. John3), W.M. Stacey11), D. Stutman12), E.J. Synakowski10), K. Tritz12)
1) University of Wisconsin, Madison, WI 53706-1609, United States of America
2) California Polytechnic State University, San Luis Obispo, CA 93407 USA
3) General Atomics, San Diego, CA 92186-5608 USA
4) Lehigh University, Bethleham, PA 18015-3182 USA
5) Princeton Plasma Physics Laboratory, Princeton, NJ 08543-0451 USA
6) Naka Site, JAEA, 801-1 Mukouyama, Naka, Ibaraki-ken, 311-0193, JAPAN
7) Massachusetts Institute of Technology, Cambridge, MA 02139 USA
8) FOM Institute for Plasma Physics Rijnhuizen, 3430 BE Nieuwegein, NETHERLANDS
9) Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA
10) Lawrence Livermore National Laboratory, Livermore, CA 94551-0808 USA
11) Georgia Tech, Atlanta, GA 30332 USA
12) Johns Hopkins University, Baltimore, MD 21218 USA

Abstract.  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 may set the lower limit (within a factor  2) on 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 ( > Tecrit≅B2/3$ \bar{{a}}^{{1/2}}_{}$ keV) because then paleoclassical transport becomes less than gyro-Bohm-level anomalous transport.

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