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Our analysis of the model [J. Phys.: Conf. Ser. 941 (2017) 012008] elaboratedfor interpreting the initial stage of the fast nonlocal transport events, whichexhibit immediate response, in the heat diffusion time scale, of the spatialprofile of electron temperature to its local perturbation, shows that thenonlocal transport by electromagnetic (EM) waves needs too high reflectivity ofvacuum vessel walls to describe the experimental data. Here we try anothermodel, which assumes high internal reflections and is compatible with the "wildcable" transport of TEM waves along magnetically-bound skeletal nanostructures.An inverse problem for recovery of the source and sink of waves, and internalreflectivity, is formulated and solved. Preliminary results of analyzing thedata from tokamaks JET and TFTR, and stellarator LHD are presented.

Recovery of parameters of fast nonlocal heat transport in magnetic fusion plasmas: testing a model of waves with high internal reflections