NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Radio & Space Physics (IJRSP) >
IJRSP Vol.37 [2008] >
IJRSP Vol.37(3) [June 2008] >


Title: ELF hiss generation at lower edge of inner radiation belt
Authors: Prakash, Ram
Gupta, D D
Agrawal, B M
Singh, Manoj Kumar
Chauhan, Pawan
Keywords: Extremely low frequency (ELF)
ELF hiss
Inner radiation belt
Cerenkov radiation
Issue Date: Jun-2008
Publisher: CSIR
Abstract: An attempt has been made to investigate the possibility of generation of ELF hiss emissions (a few hundred Hz ≤ f ≤ 3 kHz) at the lower edge of inner radiation belt (L = 1.2) by calculating their equatorial magnetic field intensities in terms of incoherent and coherent Cerenkov radiation mechanisms. The results indicate that ELF hiss emissions can not be generated by incoherent Cerenkov radiation mechanism at this location, because the intensities calculated in terms of this mechanism are found to be much lower than the observed intensities. The intensities calculated in terms of coherent Cerenkov radiation mechanism, being several orders of magnitude higher than the observed ones, indicate that the conditions are propitious for the generation of ELF hiss emissions (other than the plasmaspheric hiss) having large wave normal angles at the lower edge of inner radiation belt (L = 1.2) through partially coherent Cerenkov radiation mechanism. This is not, however, true in the case of plasmaspheric hiss (f < 1 kHz), which is thought to be originated in the vicinity of the plasmapause through electron-cyclotron resonance instability mechanism and reaching the lower L-shells after several magnetospheric reflections from there.
Page(s): 174-178
ISSN: 0367-8393
Source:IJRSP Vol.37(3) [June 2008]

Files in This Item:

File Description SizeFormat
IJRSP 37(3) 174-178.pdf96.17 kBAdobe PDFView/Open
 Current Page Visits: 607 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 639272 since 06-Feb-2009  Last updated on 15-Dec-2014Webmaster: nopr@niscair.res.in