Spectroscopic temperature measurements in an argon plasma
Pinkerton, James David
Wierum, Frederick A.
Master of Science
The various methods of determining the temperature of a plasma were considered and the current literature in the field was examined. The method of relative line intensities, using the emission from the plasma itself, was selected as that best applicable to the Mechanical Engineering Department Plasma Facility. The theory of atomic emission and absorption are reviewed and the theory of atomic line emission from an "optically thin" plasma is given. The temperature profile in the inner core of an r-f induction heated plasma torch was determined using the method of relative line intensity. The maximum temperature was found to be 5300°K.