| タイトル | Generation of large scale field-aligned density irregularities in ionospheric heating experiments |
| 著者（英） | Fejer, J. A. |
| 著者所属（英） | Max-Planck-Inst. fuer Physik und Astrophysik |
| 発行日 | 1974-05-01 |
| 言語 | eng |
| 内容記述 | Threshold and growth rate for stimulated Brillouin scattering are calculated for a uniform magnetoplasma. These are then compared with the threshold and growth rate of a new thermal instability in which the nonlinear Lorentz force felt by the electrons at the beat frequency of the two electromagnetic waves is replaced by a pressure force due to differential heating in the interference pattern of the pump wave and the generated electromagnetic wave. This thermal instability, which is still essentially stimulated Brillouin scattering, has a threshold which is especially low when the propagation vector of the beat wave is almost normal to the magnetic field. The threshold is then considerably lower than the threshold for normal stimulated Brillouin scattering and therefore this new instability is probably responsible for the generation of large scale field aligned irregularities and ionospheric spread F. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 74N31824 |
| 権利 | Copyright, Distribution within the U.S. granted by agreement |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/264137 |
