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Abstract

For the past ten years, significant progress has been made in the area of multimegawatt injected power in hot magnetically confined plasmas. These large amounts of power affect the plasma wall interactions and, this subject is now a major issue for the success of controlled thermonuclear research. It was certainly expected that the increase of plasma energy would have increased the thermal flux at the plasma frontier. But, other processes, related to an unknown power deposition profile (as in ICRH) or to the unforeseen impurity transport properties (as in NBI) have introduced open and tricky questions. The edge plasma behaviour remains critical to the bulk plasma performances (at least for medium size tokamaks). But it is yet unknown whether the largest Tokamaks (JET and TFTR) will suffer the same drawbacks. Their first results in ohmic heating show high Z-eff which is an indication of large plasma wall interactions. Thus the need for thorough investigation in this field becomes more and more essential to the progress of magnetic fusion.

Additional information

Authors: TACHON J CEA, DEPARTEMENT DE RECHERCHES SUR LA FUSION CONTROLEE, FONTENAY-AUX-ROSES (FRANCE), CEA, DEPARTEMENT DE RECHERCHES SUR LA FUSION CONTROLEE, FONTENAY-AUX-ROSES (FRANCE)
Bibliographic Reference: PHYSICS OF PLASMA-WALL INTERACTIONS IN CONTROLLED FUSION, 1986, PP. 1005-1066 PUBLISHED BY PLENUM PUBLISHING CORPORATION
Record Number: 1989124120500 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en