Recovery of parameters of fast nonlocal heat transport in magnetic fusion plasmas: testing a model of waves with high internal reflections
12 Jan 2019
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Kukushkin A. B.
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Sdvizhenskii P. A.
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Sokolov A. V.
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Minashin P. V.
Our analysis of the model [J. Phys...: Conf. Ser. 941 (2017) 012008] elaborated
for interpreting the initial stage of the fast nonlocal transport events, which
exhibit immediate response, in the heat diffusion time scale, of the spatial
profile of electron temperature to its local perturbation, shows that the
nonlocal transport by electromagnetic (EM) waves needs too high reflectivity of
vacuum vessel walls to describe the experimental data. Here we try another
model, which assumes high internal reflections and is compatible with the "wild
cable" transport of TEM waves along magnetically-bound skeletal nanostructures. An inverse problem for recovery of the source and sink of waves, and internal
reflectivity, is formulated and solved. Preliminary results of analyzing the
data from tokamaks JET and TFTR, and stellarator LHD are presented.(read more)