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For the precise analysis of toroidal confinement systems, the Toroidal Transport Analysis Code ôTOTALö has been developed and applied to the Large Helical Device (LHD) plasmas and related reactor systems. The new LHD confinement scaling law is derived, which can extrapolate the present data to the reactor regime without confinement improvement.

Slow Relaxation oscillations called "breathing" have been analyzed using the TOTAL code and the physics simulation modelling with impurity sputtering process. The slight change in transport coefficient during oscillation is experimentally found, and roles of high-Z and low-Z impurities are clarified. The breathing waveform and the oscillation period are reproduced depending on plasma density by this modelling. .

Additional information

Authors: YAMAZAKI ET AL, National Institute for Fusion Science, Toki (JP);TOKAR M, Institut fur Plasmaphysik, Forschungzentrum Jelich (DE);COOPER A, Centre de Recherches en Physique des Plasmas, EURATOM Association-Confederation Suisse, Ecole Polytechnique Federale de Lausanne (CH)
Bibliographic Reference: An oral report given at: The 28th EPS Conference of Controlled Fusion and Plasma Physics. Held in: Madeira (PT) June 2001
Record Number: 200013705 / Last updated on: 2001-09-18
Original language: en
Available languages: en