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Abstract

The growth of resistive instabilities in cylindrical geometry is described in detail. Hydromagnetic models are used. Hydromagnetic instabilities, tearing modes, pressure driven resistive interchange modes (g-modes) and rippling modes are studied using specific diffuse pinch configurations. The force-free paramagnetic model and a high beta reversed field (pitch and pressure model) configuration are investigated for ideal and resistive modes. A reversed field model which is stable to tearing modes is used to study the growth of resistive interchange and rippling modes. Various tokamak models are used to investigate tearing modes in that geometry. The growth of instabilities in diffuse pinches is characterized by the magnetic Reynolds number, S. Detailed agreement with experimental observations has been obtained for a number of pinch and tokamak configurations. It is concluded that diffuse pinch configurations typified by the reverse field pinch and tokamak in cylindrical geometry can be completely stable at zero beta both to hydromagnetic and resistive instabilities. At non-zero beta resistive interchanges manifest themselves for S>10**3 in unfavourable curvature systems but the modes become increasingly localized at higher values of S.

Additional information

Authors: ROBINSON D C CULHAM LAB. ABINGDON (UK) DIBIASE J A DEPT. OF APPLIED SCIENCE, UNIV. CALIFORNIA, CA (USA) FURZER A S CHASE ECONOMETRIC, LONDON (UK) KILLEEN J LAWRENCE LIVERMORE LAB., CA (USA) NUNN PRICE J E SERC, SWINDON (UK) , CULHAM LAB. ABINGDON (UK);DEPT. OF APPLIED SCIENCE, UNIV. CALIFORNIA, CA (USA);CHASE ECONOMETRIC, LONDON (UK);LAWRENCE LIVERMORE LAB., CA (USA);SERC, SWINDON (UK)
Bibliographic Reference: AVAILABILITY: WRITE TO THE LIBRARIAN, UKAEA, CULHAM LABORATORY, ABINGDON, OXON., OX14 3DB (UK), MENTIONING REPORT CLM-P710, 1983
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