Path-integrated growth of auroral kilometric radiation

Details Path-integrated growth of auroral kilometric radiation Path-integrated growth of auroral kilometric radiation

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....8910801o&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Dec. 1, 1984, p. 10801-10812. Previously announced in STAR as N84-348

Physics

39

Auroras, Distribution Functions, Electron Distribution, Kilometric Waves, Amplification, Background Noise, Cosmic Rays, Cyclotron Radiation, Electromagnetic Wave Transmission, Electrons, Ray Tracing, Refraction

Scientific paper

Using Poeverlein's graphical method, three dimensional ray path calculations are performed to evaluate the path-integrated growth of auroral kilometric radiation (AKR). The ray tracing results indicate that waves whose initial wave vector lie in the local meridian plane continue to propagate in that plane and that among these waves, those with frequencies near the cutoff frequency (f sub R = 0) refract substantially, where as those with frequencies well above the cutoff frequency suffer little refraction. It is also shown that waves whose initial wave vector lie outside of the local meridian plane propagate in the longitudinal as well as the radial and the latitudinal directions. The refraction of these waves is also highly dependent upon the wave frequency, i.e., waves with frequencies near f sub R = 0 refract substantially, whereas waves with frequencies much above f sub R = 0 undergo little refraction. In order to test the electron cyclotron maser mechanisms as a method for generation of AKR, a typical electron distribution function measured in the auroral zone by the S3-3 satellite, is used to calculate path-integrated growths of representative rays. The results of this study indicate that electron distribution functions like those measured by the S3-3 satellite are not capable of amplifying cosmic noise background to the observed intensities of auroral kilometric radiation, and that much steeper slopes at the edges of the loss cone are required. The presence of such distribution functions in the auroral zone is plausible if one assumes that backscattered electrons in this region have energies less than a few hundred eV.

Affiliated with

Also associated with

No associations

Rating

Path-integrated growth of auroral kilometric radiation 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 Path-integrated growth of auroral kilometric radiation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Path-integrated growth of auroral kilometric radiation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-737090