Radiation Efficiency of Argon Torch Plasma as Function of the Plasma Length

Abstract

When a reduction of waste and dissolution of iron are carried out by using arc plasma, the arc radiation power should be suppressed. In those cases the radiation power from plasmas has to be precisely controlled.
Therefore, we tried to measure the radiation power from torch plasma using a power-meter. The radiation power was measured to be about 100_??_2, 000 W for an appearance plasma length of 1_??_3cm at 50_??_150A and increases in proportion to the 1.85th power of the plasma current and with increment of appearance plasma length.
The radiation efficiency for the appearance torch plasma is 8_??_27%, and also that for the wall-stabilized arc model in whole plasma length is 19-43% in the condition mentioned above in the sphere model.