On the sign of frequency drift of energetic electron beam radio emission

V.G.Ledenev

Abstract

It is shown that the positive frequency drift that is sometimes observed in the high-frequency part of type III bursts can be explained by a decrease in the signal group delay as the emission source moves in the direction of decreasing density. This effect is determined fundamentally by the velocity of the emission source (electron beam) and by the density distribution along the propagation path of electromagnetic waves. It is considered the influence of magnetic field on the group delay.
 
 
 

  Organization: Institute of Solar-Terrestrial Physics
     Telephone: (3952)46-36-91
           Fax: (3952)46-25-57
        e-mail: leden@iszf.irk.ru
       Address: 664033, Irkutsk, P.O.Box 4026, Russia