  On TRIAM-1M, a long duration discharge for more than 5 h was achieved
successfully by fully non-inductive lower hybrid current drive. Heat load
distribution to the plasma facing components (PFCs) in the 5 h discharge was
investigated by using calorimetric measurements. The injected RF power was
coincident with the total amount of heat load to PFCs estimated by calorimetric
measurement. The power balance including the portion of direct loss power of
fast electron, heat flux due to the charge exchange process was able to be
estimated in this long duration discharge.
