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Abstract

The significant impact of neutral beam heating (NBI) on plasma boundary parameters in TEXTOR, namely a strong increase of n(e) and T(e), is demonstrated. The heat flux to the limiter increases at a rate more than proportional to the heating power (factor >17) due to enhanced energy transport in the centre and to a change of power sharing, by reducing the fraction of radiation from light impurities and increasing the fraction of convective energy flow at the separatrix. The probability of trapping injected H atoms in the wall-limiter system is estimated from spectroscopic measurements.

Additional information

Authors: SAMM U, Institut für Plasmaphysik, KFA Jülich GmbH (DE);BOGEN P, Institut für Plasmaphysik, KFA Jülich GmbH (DE);HARTWIG H, Institut für Plasmaphysik, KFA Jülich GmbH (DE);HINTZ E, Institut für Plasmaphysik, KFA Jülich GmbH (DE);HÖTHKER K, Institut für Plasmaphysik, KFA Jülich GmbH (DE);LIE Y T, Institut für Plasmaphysik, KFA Jülich GmbH (DE);POSPIESZCZYK A, Institut für Plasmaphysik, KFA Jülich GmbH (DE);RUSBÜLDT D SCHWEER B, Institut für Plasmaphysik, KFA Jülich GmbH (DE);HOTHKER K, Institut fur Plasmaphysik, KFA Julich GmbH (DE);RUSBULDT D SCHWEER B, Institut fur Plasmaphysik, KFA Julich GmbH (DE)
Bibliographic Reference: Paper presented: 16th European Conference on Controlled Fusion and Plasma Physics, Venezia (IT) March 13-17, 1989
Availability: Available from (1) as Paper EN 34780 ORA
Record Number: 198910625 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en