Accession Number : AD0621370

Title :   THE EXPECTED INTENSITY OF A MAGNETIC DIPOLE TRANSITION IN THE IONOSPHERE.

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK IONOSPHERE RESEARCH LAB

Personal Author(s) : Herman,Jay R.

Report Date : 01 SEP 1965

Pagination or Media Count : 78

Abstract : A prediction is obtained for the strength of a magnetic dipole transition for two components of the ionosphere that possess a permanent magnetic moment. The expressions that are obtained can be used to find the number density of these species once a suitable experiment is designed to measure the actual intensity. The problem is separated into three main parts. First an equation is obtained that describes the transfer of electromagnetic energy in a magneto-ionic medium. The effect of the free electrons is introduced by requiring that the wave number be related to the frequency by a dispersion relation. The dispersion relation, in turn, is associated with the refractive index of the medium. In addition, a velocity for the transfer of energy in the form of photons is obtained that permits the energy density to be associated with the intensity. Second, the various sources of electromagnetic energy that contribute to the total intensity are discussed. These are, the magnetic dipole emission from atomic oxygen or nitric oxide, the thermal emission from the heavy particles (neutrals and ions), the electron bremsstrahlung, and the external cosmic and ground based radio noise. Third, the methods of solution are discussed for the integro-differential equation that determines the total intensity at each point in the medium. These methods are chosen for the ease with which they can be adapted for computer analysis. (Author)

Descriptors :   (*IONOSPHERE, PLASMAS(PHYSICS)), (*PLASMAS(PHYSICS), IONOSPHERE), (*SELECTION RULES(PHYSICS), IONOSPHERE), MAGNETIC MOMENTS, DIPOLE MOMENTS, ELECTRON TRANSITIONS, OXYGEN, ELECTROMAGNETIC RADIATION, PROPAGATION, MAGNETOHYDRODYNAMICS, THERMAL RADIATION, BREMSSTRAHLUNG, GEOPHYSICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE