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Plasma diagnostics using synchrotron radiation in next generation large tokamaks is discussed. It is shown that for electron temperature on axis in excess of 20-25 keV, harmonic overlap invalidates the familiar second harmonic emission method for temperature measurements in the central plasma region. Radiation measurements at arbitrary frequencies of the X-mode normal to the magnetic field in the horizontal and vertical directions are shown to yield a set of independent equations for deriving the plasma parameters characterising the temperature and density profiles. The method and the salient features of the emitted radiation at arbitrary frequencies are illustrated for parameters relevant to the design of tokamak reactors.

Additional information

Authors: FIDONE I, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);GRANATA G, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Report: EUR-CEA-FC-1503 EN (1993)
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199311594 / Last updated on: 1994-11-28
Original language: en
Available languages: en
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