1 - Nuclear Sciences and Applications - IAEA

280 ASHRAF et al.
Modulation amplitude vs resonance position
30
Phase delay vs resonance position
-30 -20 -10 0 10
rres(cm)
FIG. 3. Amplitude and phase of the ion saturation current and radial field fluctuations as a function
ofECRH resonance position for second harmonic heating.
5. CONCLUSION
X e J* values deduced from power balance and sawtooth propagation are similar
and both fall with increasing ne. Modulation experiments give somewhat
higher values of x e j* • There are indications that the effective thermal conductivity
nex e j* rises away from the central regions of the plasma. The
amplitudes and delay times of the edge response are consistent with diffusive
energy transport from the power deposition region. Off-diagonal terms
in the transport matrix appear to be small.
REFERENCES
[1] ASHRAF, M., et al., Paper IAEA-CN-5O/E-I-3, these Proceedings, Vol. 1.
[2] JAHNS, G.L., et al., Nucl. Fusion 26 (1986) 226.
[3] DELIYANAKIS, N., et al., in Electron Cyclotron Emission and Electron Cyclotron Resonance
Heating (Proc. 6th Joint Workshop Oxford, 1987), UKAEA, Culham Lab., Abingdon (1987)
247.