1 - Nuclear Sciences and Applications - IAEA

IAEA-CN-50/E-I-2 539
The ELM-free period is characterized by improved confinement of
electron heat as well as density. Figure 7 shows profiles of electron temperature
for the ohmic, NBI L-mode, NBI plus ECH H-mode, and ELM-free
H-mode phases of the discharge of Fig. 5. These profiles show that the
effect of ELMs is not just on the density, but that by suppression of ELMs
the electron temperature may be increased. If the ECH is not being absorbed
near the plasma center, as expected during the ELM-free period,
improvement in confinement of electron heat near the center of the plasma
is even greater.
ACKNOWLEDGEMENT
This work was supported by the U.S. Department of Energy under
Contracts DE-AC03-84ER51044 and W-7405-ENG-48. The authors
would like to acknowledge outstanding engineering support by D. Bell,
E. Hoffman, and A. Nerem.
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