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(EXP3/03) Observation of Neo-Classical Tearing Modes in JET

   
The JET Team 1 (presented by G. Huysmans )
1 see Appendix to IAEA-CN-69/OV1/2

 
JET Joint Undertaking, Abingdon, Oxfordshire, United Kingdom

Abstract
Neo-classical tearing modes have been identified in JET  ELMy H-mode  discharges at medium to high beta . The n=2 modes as observed in both ECE and SXR data, have a clear island structure and a global character. The critical normalised beta at the onset of the modes is found to scale with the normalised Larmor radius. The scaling with collisionality  is much weaker and has a negative power.

 

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IAEA 1999