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Abstract

Emission of synchrotron radiation for plasma diagnostic purposes in existing and Next Step tokamaks at arbitrary density and temperature is discussed. This new method is motivated by the need to overcome several deficiencies, caused by cut-off, refraction, and harmonic overlap, and to enhance the informative contents of the familiar low harmonic scheme. The basic theory of the method is presented and illustrated by numerical applications, for plasma parameters of relevance in present and Next Step tokamaks. It is shown that the electron temperature in Maxwellian plasmas can be measured from the radiation spectrum in the frequency ranges where the plasma is optically thick and optically thin, without any ad hoc assumption on the effective wall reflection coefficient. Non-thermal features due to rf absorption and a dc electric field are also briefly discussed.

Additional information

Authors: FIDONE I, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);GIRUZZI G, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR);GRANATA G, CEA, Département de Recherches sur la Fusion Contrôlée, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Report: EN (1995) 44 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199511526 / Last updated on: 1995-12-12
Category: PUBLICATION
Original language: en
Available languages: en
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