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A power balance model of the RFP has been developed on the assumption that electrons are heated ohmically while the power associated with the fluctuations is responsible for heating the ions. Anomalous diffusion due to turbulent convection is assumed to be the dominant loss mechanism for both ions and electrons and a single diffusion coefficient is used to describe both particle and energy losses. On making various assumptions of plasma behaviour, the model can account for the experimentally-observed diffusion coefficient, the ion and electron axial temperatures and radial profiles, as well as the scaling of electron temperature with density and current. The variation of the ratio of axial electron and ion temperatures with the insertion depth of the mobile limiter in HBTX1B is also quantitatively reproduced by the model.

Additional information

Authors: CAROLAN P G, Culham Laboratory, Abingdon, Oxon (GB);LAZAROS A, Euratom Fellowship, Fusion Programme, Physics Department, UMIST, Manchester (GB);RUSBRIDGE M G, Oxford Polytechnic (GB);LONG J W,
Bibliographic Reference: Report: CLM-P852 EN (1988)
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon. OX14 3DB (GB)
Record Number: 198910255 / Last updated on: 1994-12-01
Original language: en
Available languages: en