Comparative analysis at SK/CG-1 machine for spheromak plasma heating

The SK/CG-1 machine has been constructed to generate compact toroids (CT's) such as spherical torus, spherical pinch and spheromak. In previous studies they have been investigated the new magnetically driven plasma gun (C-gun) with high injection efficiency together with the system description of SK/CG-1, the magnetic helicity and injection, the Taylor state and formation for the production of alternative CT's. In this study, in order to understand the heating mechanism at SK/CG-1 more accurately, successive processes of ionization rate, formation, reconnection and plasma radiation loss have comparatively been evaluated. For this purpose, the data taken by the total flux loop, the electrical surface and Langmuir probes the charge exchange cell or other magnetic tools and the visible optical spectrometer have been used. (author) 6 refs., 4 figs