Physics
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.8081m&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Oct. 1, 1983, p. 8081-8093.
Physics
8
Electron Emission, Electron Impact, Plasma Antennas, Plasma Equilibrium, Space Plasmas, Thermal Noise, Antenna Radiation Patterns, Cylindrical Antennas, Debye Length, Dipole Antennas, Noise Spectra, Plasma Frequencies, Plasma Sheaths, Plasma-Electromagnetic Interaction, Spherical Antennas
Scientific paper
The quasi-thermal noise theory is extended to antennas that are not transparent to particles. The results are applied to small-radius spherical and cylindrical antennas in an isotropic equilibrium plasma at frequencies of the order of magnitude of the plasma frequency. For antennas near the plasma dc potential, the theoretical noise is found to consist of the usual thermal noise on a transparent antenna plus a component that has the following two properties. The first is that for small double-spheres antennas, the component has an f(-2) spectrum around the plasma frequency; just below this frequency, the component is of the same order of magnitude as the thermal noise if the ratio of the antenna length to the plasma Debye length is greater than one. It is much larger if this ratio is much less than one. The second property is that for fine cylindrical antennas, the component is only broadly f(-2) below the plasma frequency; just below this frequency it is much smaller than the quasi-thermal noise, except when the antenna surface is larger than the ratio of the fourth power of the antenna length to the square of the plasma Debye length.
No associations
LandOfFree
Quasi-thermal noise corrections due to particle impacts or emission does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quasi-thermal noise corrections due to particle impacts or emission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quasi-thermal noise corrections due to particle impacts or emission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1193980