Date of Award
1970
Document Type
Thesis
Publication Status
Version of Record
Submission Date
October 2026
Thesis/Dissertation Advisor [Chair]
Burnett, Clyde R.
Abstract
The purpose of this experimental study of the helium afterglow in a hollow cathode discharge is to identify the mechanisms which cause an apparent unequal acoustic modulation of the red and violet wings of observed optical spectrum lines. The unequal red-violet effect is traceable to the fact that curved spectrum lines are formed at the exit slit of a monochromator which is equipped with straight entrance and exit slits. Curved spectrum lines emphasize the red and violet wings differently, depending on the light contributions from different portions of the entrance slit, so that spatial variations in the optical image due to acoustic standing waves show unequal integrated light intensities for the modulation of each wing. Only the central portion of the radial standing wave in the afterglow (Bessel function J (kr) distribution) was explored, and the ratio of the red to violet amplitude calculated as 1 : 1.58 agrees qualitatively with experimental results.
Extent
62 p.
Recommended Citation
KILPATRICK, WALLACE DORMAN, "PSEUDO-SPECTRAL EFFECT FOR THE ACOUSTIC OSCILLATIONS OF A HELIUM AFTERGLOW" (1970). Electronic Theses and Dissertations 1970 - 1979. 25.
https://digitalcommons.fau.edu/etd_general_2/25
Identifier
FADT13423
Comments
Thesis (M.S.)--Florida Atlantic University, 1970.|Charles E. Schmidt College of Science|FAU Electronic Theses and Dissertations Collection|Thesis (M.S.)--Florida Atlantic University, 1970.