Bolometer measurements of ultra-low-q and reversed field pinch plasmas in REPUTE-1

The energy loss by radiation is estimated in REPUTE-1 by bolometric measurements. Burning out of the radiation barrier is observed in both ultra-low-q (ULQ) and reversed field pinch (RFP) discharges. The conditions for burning out of the radiation barrier are studied for various operation parameters. A reduction of the radiation loss is observed after wall conditioning by carbonization.