Note
Thesis (M.S.)--Florida Atlantic University, 1970.
Member of
Contributors
Publisher
Florida Atlantic University
Date Issued
1970
Description
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.
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.
Language
Type
Form
Extent
62 p.
Subject (Topical)
Identifier
13423
Additional Information
Thesis (M.S.)--Florida Atlantic University, 1970.
Charles E. Schmidt College of Science
FAU Electronic Theses and Dissertations Collection
Date Backup
1970
Date Text
1970
Date Issued (EDTF)
1970
Extension
FAU
FAU
admin_unit="FAU01", ingest_id="ing1508", creator="staff:fcllz", creation_date="2007-07-19 01:03:52", modified_by="staff:fcllz", modification_date="2011-01-06 13:08:48"
IID
FADT13423
Issuance
monographic
Organizations
Attributed name: Florida Atlantic University
Attributed name: Charles E. Schmidt College of Science
Attributed name: Department of Physics
Person Preferred Name
KILPATRICK, WALLACE DORMAN
Graduate College
Physical Description
62 p.
application/pdf
Title Plain
PSEUDO-SPECTRAL EFFECT FOR THE ACOUSTIC OSCILLATIONS OF A HELIUM AFTERGLOW
Use and Reproduction
Copyright © is held by the author with permission granted to Florida Atlantic University to digitize, archive and distribute this item for non-profit research and educational purposes. Any reuse of this item in excess of fair use or other copyright exemptions requires permission of the copyright holder.
http://rightsstatements.org/vocab/InC/1.0/
Origin Information
1970
monographic
Boca Raton, FL
Florida Atlantic University
Physical Location
Florida Atlantic University Libraries
Place
Boca Raton, FL
Sub Location
Digital Library
Title
PSEUDO-SPECTRAL EFFECT FOR THE ACOUSTIC OSCILLATIONS OF A HELIUM AFTERGLOW
Other Title Info
A
PSEUDO-SPECTRAL EFFECT FOR THE ACOUSTIC OSCILLATIONS OF A HELIUM AFTERGLOW