Intrinsic Rotation Generation in NSTX Ohmic H-mode Plasmas
Authors: Jong-Kyu Park, Ronald E. Bell, Stanley M. Kaye, Wayne M. Solomon, Benoit P. LeBlanc, Ahmed Diallo, and Shigeyuki Kubota
Abstract:
Intrinsic rotation generation has been observed and investigated in NSTX Ohmic plasmas, by
utilizing passive views of charge exchange recombination diagnostics. Particularly we focused
Ohmic L-H transition to minimize effects by other momentum exchange and sources such as an
intrinsic NTV. Results indicated that intrinsic rotation generation in the edge is well correlated
with ion temperature gradient change, compared with much weaker correlations with electron
temperature gradient or density gradient change. This is consistent with a corresponding theory of
residual stress and the measured torque could be directly compared with the theoretical prediction
using i as a free parameter. However, an uncertainty of an order of diamagnetic rotation exists
in many places across measurement and theory, as well be discussed in details in this paper.
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Submitted to: Nuclear Fusion (June 2012)
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Download PPPL-4768 (pdf 7.63 MB 20 pp)
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