Preliminary energy-flux measurements on ZT-40M

Bolometer measurements indicate that 15 to 20% of the plasma losses from ZT-40M are due to radiation for a 190-kA, 1.6-mtorr discharge. The fraction of radiation losses increases slightly as the current is decreased. Thermistor measurements of the bellows temperature rise following a 190-kA discharge show large shot-to-shot variation on bellows peaks (relative to the plasma), with bellows peaks at large major radii being heated considerably more than bellows peaks at small major radii.