title: Optogalvanic effect in a hollow cathode discharge with nonlaser sources.
abstract: Several atomic emission sources were investigated for their potential to induce optogalvanic signals in hollow cathode lamps. The sources included an inductively coupled argon plasma, a H(2)-O(2) flame, a high-temperature furnace, electrodeless microwave discharge lamps, and hollow cathode lamps. Successful results were obtained with argon emission from the inductively coupled plasma focused into an argon-filled hollow cathode tube and with atomic emission from one hollow cathode discharge focused into a hollow cathode tube containing the same element. Very low level optogalvanic signals were observed from the other sources but could not be unambiguously ascribed to emission from a specific element. A problem encountered was the presence of a background signal due to photoelectric emission and possibly radiative heating of the cathode.
authors.forename: C T
authors.initials: CT
authors.lastname: Apel
authors.forename: R A
authors.initials: RA
authors.lastname: Keller
authors.forename: E F
authors.initials: EF
authors.lastname: Zalewski
authors.forename: R
authors.initials: R
authors.lastname: Engleman