1. Multi-device studies have established the I-mode regime as robust in a wide operating space
I-mode regime has many attractive features for fusion:
Te, Ti pedestals give high energy confinement, little power degradation.
L-mode particle confinement gives low, steady impurity radiation, even with high Z PFCs.
Stationary and ELM-free.
Regime now established on Alcator C-Mod, ASDEX Upgrade and DIII-D, mainly with ion B×B drift away from the primary divertor, over a wide range of conditions.
BT =1.9-8 T, q95 = ,
n*ped =
With ICRH, NBI and/or ECRH.
High BT values open up a wider operational window for I-mode
Positive result for ITER at BT 5.3 T.