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In polarisation experiments on TEXTOR, radial electric fields in the plasma edge are set up by means of a biased electrode which is inserted inside the last closed flux surface. This paper concentrates on the effect of polarisation on the radiated power and the edge temperature in the ohmic as well as in the neutral beam heated (NBI) case. The radiated power can be described by means of the radiation potential E(Rad), which represents the total energy which is radiated per particle during its dwell time in the plasma. The total radiated power P(Rad) is given by P(Rad) = E(Rad) x T(i) where T(i) is the surface integrated impurity flux. The term E(Rad) depends on the impurity species, the transport and also strongly on the edge electron temperature.

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Authors: VAN NIEUWENHOVE R, Ecole Royale Militaire, Bruxelles (BE);VAN OOST G, Ecole Royale Militaire, Bruxelles (BE);WEYNANTS R, Ecole Royale Militaire, Bruxelles (BE);POSPIESZCZYK A, Forschungszentrum Jülich GmbH (KFA) (DE);SAMM U, Forschungszentrum Jülich GmbH (KFA) (DE);SCHWEER B, Forschungszentrum Jülich GmbH (KFA) (DE);UNTERBERG B, Forschungszentrum Jülich GmbH (KFA) (DE)
Bibliographic Reference: Article: 21st EPS Conference on Controlled Fusion and Plasma Physics, Montpellier, 27 June - 1 July, 1994, Vol. 18B (1994) Part II, pp. 798-801
Record Number: 199510172 / Last updated on: 1995-02-07
Original language: en
Available languages: en