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Abstract

This report concerns work carried out under contract no. 133/83 + 9/FU-UK/NET. The boundary plasma of NET/INTOR has been modelled using a two-dimensional fluid description of the plasma. The region modelled extends from the inner to the outer single-null divertor channels via the scrape-off plasma. It also includes a thin layer of plasma inboard of the separatrix. Transport of recycling neutral particles is treated in a simplified manner which neglects molecules. The results show that the power flow to the divertor channels is asymmetric and that the peak power loading at the outer target is about 20 MW/m**2. High recycling within the divertor reduces the peak electron temperatures of the plasma sheath to 29 eV at the outer and 9 eV at the inner targets respectively. Sputtering of the tungsten target is very modest, about 10**19 atom/s. Net erosion is expected to be substantially less because of the redeposition of sputtered atoms. Pumping of helium can be optimized by restricting the height of the pumping ducts to about 0.25 m. Some backflow of DT plasma from the throats of the high recycling divertor is predicted.

Additional information

Authors: HARRISON M F A, CULHAM LABORATORY, ABINGDON (UK);ENEA, ISTITUTO DI BOLOGNA (ITALY);HOTSTON E S, CULHAM LABORATORY, ABINGDON (UK);ENEA, ISTITUTO DI BOLOGNA (ITALY);DE MATTEIS A CULHAM LABORATORY, ABINGDON (UK), CULHAM LABORATORY, ABINGDON (UK);ENEA, ISTITUTO DI BOLOGNA (ITALY);ENEA, ISTITUTO DI BOLOGNA (ITALY), CULHAM LABORATORY, ABINGDON (UK);ENEA, ISTITUTO DI BOLOGNA (ITALY)
Bibliographic Reference: WRITE TO THE LIBRARIAN, UKAEA, CULHAM LABORATORY, ABINGDON, OXON OX14 3DB (UK), MENTIONING REPORT CLM-P 761, 1985
Record Number: 1989125022800 / Last updated on: 1987-02-01
Category: PUBLICATION
Available languages: en
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