DENSITY FLUCTUATIONS AND "ANOMALOUS" HEAT TRANSPORT IN OHMICALLY AND AUXILIARY HEATED PLASMAS
All the reported data show a direct connection between density fluctuations and "anomalous" losses. In particular we observe: i) A linear relationship between the relative density fluctuations with the transport losses and the inverse confinement time is observed on TFR in the present Tokamak regime. ii) Turbulence in the auxiliary heating phases is the continuity of the ohmic phase turbulence. A common process, referring to the plasma itself and independent of the type of auxiliary heating, is very likely involved. However, the conclusion that density fluctuations are responsible for the "anomalous" losses, is too strong and not possible. The question is still open and will still necessitate a lot of effort, in the experimental as in the theoretical domain. Other mechanisms (magnetic turbulence etc...) could also be invoked. Direct measurements of magnetic modes (azimuthal mode number m = 5 to 10), at the ? periphery of the plasmas, would help in clarifying these questions.
Bibliographic Reference: COURSE AND WORKSHOP ON APPLICATIONS OF RF WAVES TO TOKAMAK PLASMAS, VILLA MONASTERO, VARENNA (ITALY), SEPT. 5-14, 1985 PP. 570-584, VOL. II 908 P., 1985, VOL. I AND VOL. II WRITE TO MONOTYPIA FRANCHI, VIALE UMBRIA 28/C, 06012 CITTA DI CASTELLO, PERUGIA (I
Record Number: 1989124104300 / Last updated on: 1987-01-01
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