Self organization of wave coupling at SK/CG-1 machine and conceptual design of SK/CG-2

In magnetic confinement systems, the self organization process can generally be defined by the important mechanism which develops the variation of controlled and programmable system parameters impressed by the principal plasma parameters. The role of the self organization process may be seen in the examples such as the change of q profiles at high beta systems; the sensitivity of magnetic Reynolds number S at RFP schemes; the influence of F-9 field reversal ratio and pinch parameter and the tokamak formation in circular cross section from a cylindrical transverse plasma sheet in the DC helicity driven tokamak. Previously, at the SK/CG-1 device (World Survey of Activities in Controlled Fusion Research, 1986 Edition, IAEA Vienna, p. 197) by means of the C-Gun located directly inside the flux conserver, the non inductive helicity injection with high efficiency has been determined. Although the operating period of the C-gun is only a few microseconds depending on the used gas pressure in the range of 30-50 mTorr, in SK/CG-1 device the low frequency drift range of 30-50 mTorr, in SK/CG-1 device the low frequency drift waves continuing up to 5-20 ms or more have been observed. This interesting result has caused to reexamine the drift wave mode in SK/CG-1 by the concept of helicity transfer from the wave to plasma including the self organization process. (author) 5 refs