Abstract

We have measured the spectral distribution, intensity, and excitation temperature of pulsed discharges in sodium and thallium iodide vapors with mercury or argon. Peak plasma temperatures are in the neighborhood of 10 000°K. Both peak intensity and peak plasma temperature increase less than linearly as functions of energy input at energies over 5 J/cm³ of arc tube volume. In comparison with continuous operation, both the mercury spectrum and a continuum are enhanced relative to the iodide spectrum in pulsed NaI–Hg and TlI–Hg arcs, and the Na or Tl and Hg lines become strongly broadened. The radiant output of Na or Tl in iodide–argon pulsed arcs is limited by lack of significant line broadening.

© 1964 Optical Society of America

Characteristics of Mercury Vapor–Metallic Iodide Arc Lamps

Gilbert H. Reiling
J. Opt. Soc. Am. 54(4) 532-540 (1964)

Some Characteristics of Metal Iodide—Mercury Arcs

T. H. Rautenberg and P. D. Johnson
Appl. Opt. 3(4) 487-492 (1964)

On the Question of Equilibrium in Mercury + Thallium Iodide Arc Discharges

C. F. Gallo
Appl. Opt. 5(8) 1285-1291 (1966)

Theoretical Analysis of the Behavior of Mercury plus Thallium Iodide Arc Lamps with Variable Mercury Loadings

C. F. Gallo
Appl. Opt. 9(12) 2711-2716 (1970)

The Effect of Thallium Iodide on the Arc Temperature of Hg Discharges

C. F. Gallo
Appl. Opt. 6(9) 1563-1565 (1967)