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Results on the application of Fourier analysis to various types of heat pulse propagation experiments in Joint European Torus (JET) plasmas are reported. The use of electron temperature data from the new electron cyclotron emission (ECE) heterodyne diagnostic has generally improved the quality of the results. The propagation of cold pluses from laser ablation is shown to have a nonlocal character. Edge localized modes (ELM) also induce cold pulses that do not propagate diffusively. Heat pulses from sawtooth instability in low power plasmas propagate diffusively. At high power the data are affected by the presence of ELMs and by a rather large radial extension of the initial temperature perturbation. The need for new heat pulse propagation experiments in regimes of moderate fusion performance is emphasized.

Additional information

Authors: DE ANGELIS R ET AL, JET Joint Undertaking, Abingdon, Oxon, (GB);DE LUCA F ET AL, Università degli Studi di Milano, Dipartimento di Fisica (IT);JACCHIA A ET AL, ENEA, Istituto di Fisica del Plasma, Milano (IT)
Bibliographic Reference: Report: JET-R(95)04 EN (1995) 30pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon, OX14 3EA (GB)
Record Number: 199610398 / Last updated on: 1996-04-15
Original language: en
Available languages: en