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.
IAEA 1999