1. Te Gradient Scale Length: ITB threshold D. Mikkelsen
MP-428: Changing heating location clearly changes R/LTe
R/LTe is lower inside Rheat ~ Rfoot.
Next: determine threshold R/LTe,
and the parametric dependences (q, …)
Off-axis heating was ramped up after H-mode forms
central heating ramps down: total power ~constant
ITBs are formed in spite of the delay
they aren’t clearly later than standard ITB comparison
should delay off-axis heating more; shorter ITB phase

2. ITBs with delayed off-axis heating

3. Te Te
sec
R (m)
Ro/LTe
sec