Steady state experiments on current profile control and long sustainment of high performance LHCD plasmas on the superconducting tokamak TRIAM-1M

The main purpose of TRIAM-1M (R-0 = 0.8 m, a x b = 0.12 m x 0.18 m, B = 8 T ) is to study the route towards a high field compact steady state fusion re actor. In the advanced steady state operation programme, a heating mechanis m for the high ion temperature mode with an internal transport barrier has been studied, an enhanced current drive mode in an extended (higher power a nd higher density) operation regime has been obtained, current density prof ile control experiments using multicurrent drive systems have been performe d and the effects of wall recycling, wall pumping and wall saturation on pa rticle control have been investigated.