EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information
Ludlow 1989
Ludlow, G.R. (1989). Growth of obliquely propagating ion cyclotron waves in the magnetosphere. Journal of Geophysical Research 94: doi: 10.1029/89JA01140. issn: 0148-0227.

We present linear growth rate calculations of the electromagnetic ion cyclotron waves driven by hot anisotropic protons in a magnetized plasma. The angle between the wave vector and the magnetic field is arbitrary. This introduces Landau damping by the thermal electrons, an effect not present for strictly parallel propagation. The model contains concentrations of O+ and He+ as well as H+, with densities and temperatures typical of ion cyclotron wave generation regions inside the plasmasphere around L=3. The behavior of growth regions in k space is studied. Althought the growth rates peak at &thgr;=0¿, they do not depend strongly on &thgr; for &thgr;<30¿. At large wave normal angles, weak peaks in wave growth are found with much smaller growth rates than at 0¿. Electron Landau damping of ion cyclotron waves maximizes at very oblique wave normal angles where the growth rate can be reduced significantly, but has little or no effect in the region of k space (&thgr;<45¿) where the waves are growing the fastest. ¿ American Geophysical Union 1989

BACKGROUND DATA FILES

Abstract

Keywords
Magnetospheric Physics, Plasma waves and instabilities
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org
Click to clear formClick to return to previous pageClick to submit