The lineshape of light emission from a titanium vacuum arc was studied using a Fizeau interferometer coupled with an optical multichannel analyzer (OMA). A viewing geometry normal to the cathode surface was employed. Temperatures of ~3 × 105 K and ~3.5 × 104 K were obtained for titanium ions and titanium atoms present in the cathode spot, respectively. In light of results from previous work, a case is made for the latter temperature being the actual heavy species temperature in the cathode spot.
© 1990 Optical Society of America
Zhen Hua Wang, P. D. Swift, A. J. Studer, D. R. McKenzie, B. W. James, and I. S. Falconer, "Light emission from a titanium vacuum arc using Fizeau interferometry with parallel detection," Appl. Opt. 29, 5145-5150 (1990)