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Prepared by H. Takenaga (JAEA)

Prepared by H. Takenaga (JAEA). TC-5 : Determine transport dependence on Ti/Te ratio in hybrid and steady-state scenario plasmas. Enhanced transport was also observed during ECH in AUG as well as JT-60U and DIII-D.

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Prepared by H. Takenaga (JAEA)

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  1. Prepared by H. Takenaga (JAEA) TC-5 : Determine transport dependence on Ti/Te ratio in hybrid and steady-state scenario plasmas • Enhanced transport was also observed during ECH in AUG as well as JT-60U and DIII-D. • In AUG, R/LTi variation in NBI and NBI+ECH phases agrees with ITG threshold,provided both ExB shearing and Te/Ti stabilizing effects are taken into account • Experimentally, causality of increase in Te/Ti and enhancement of transport is not clear from responses of Te and Ti after ECH switch on. • Is it possible to understand systematically in JT-60U, DIII-D and AUG ? • Close out ?

  2. Effects of ECRF on Ti- and ne-ITBs in JT-60U JT-60U • 2nd X-mode ECRF was injected in weak shear plasmas at Ip=1 MA and BT~1.9 T. • Central density and stored energy decreased by injecting ECRF. • Ti-ITB degraded and central density seems to be flattened during ECRF injection. • Toroidal rotation was slowed by injecting ECRF. t = 4.4 s, 5.4 s

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