Physics of Plasmas
Feedback | Help | Exit
Physics of Plasmas
   
 
 
 
Previous Article
Forecast of auroral activity
A new technique is developed to predict auroral activity based on a sample of over 9000 auroral sites identified in global auroral images obtained by an ultraviolet imager on the NASA Polar satellite ...
Next Article
Neutrino (antineutrino) effective charge in a magnetized electron–positron plasma
Using dynamical techniques of the plasma physics, the neutrino (antineutrino) effective charge in a magnetized dense electron–positron plasma is determined here. It shown that its value, which is...

Interpretation of Cluster data on chorus emissions using the backward wave oscillator model

Phys. Plasmas 11, 1345 (2004); doi:10.1063/1.1667495

Published 24 March 2004

You are not logged in to this journal. Log in

V. Y. Trakhtengerts and A. G. Demekhov
Institute of Applied Physics, Nizhny Novgorod, Russia

E. E. Titova and B. V. Kozelov
Polar Geophysical Institute, Apatity, Russia

O. Santolik
Charles University, Prague, Czech Republic

D. Gurnett
University of Iowa, Iowa City, Iowa

M. Parrot
CNRS/LPCE, Orleans, France
The measurements of chorus emissions by four closely separated Cluster spacecraft provide important information concerning the chorus generation mechanism. They confirm such properties of the wave source as their strong localization near the equatorial cross section of a magnetic flux tube, an almost parallel average wave-vector direction with respect to the geomagnetic field, and an energy flux direction pointing outward from the generation region. Inside this region, Cluster discovered strong temporal and spatial variations in the amplitude with correlation scale lengths of the order of 100 km across the magnetic flux. The wave electric field reached 30 mV/m, and the maximum growth and damping rates are of the order of a few hundreds of s–1. These and other properties of the detected chorus emissions are discussed here in relation with the backward wave oscillator mechanism. According to this mechanism, a succession of whistler wave packets is generated in a small near-equatorial region with temporal and spatial characteristics close to the Cluster data. Amplitudes and frequency spectra, as well as dynamical features of the Poynting flux of chorus are estimated and compared with the Cluster measurements. ©2004 American Institute of Physics.
History: Received 25 August 2003; accepted 24 November 2003; published 24 March 2004
Permalink: http://link.aip.org/link/?PHPAEN/11/1345/1
BUY THIS ARTICLE   (US$28)
Download PDF (606 kB) View Cart

Supplemental Material

KEYWORDS and PACS

Keywords
PACS
  • 52.35.Hr
    Plasma electromagnetic waves electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid waves
  • 94.30.Lr
    Magnetic storms, substorms in the magnetosphere
  • 95.30.Qd
    Astrophysical magnetohydrodynamics and plasmas
  • YEAR: 2004

RELATED DATABASES


To view database links for this article,
you need to log in.
To view database links for this article,
you need to log in.

PUBLICATION DATA

ISSN:
1070-664X (print)   1089-7674 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (24)
View in Separate Window/Tab
For access to fully linked references, you need to log in. For access to fully linked references, you need to Log in.
  1. R. A. Helliwell, Rev. Geophys. 7, 281 (1969).
  2. S. S. Sazhin and M. Hayakawa, Planet. Space Sci. 40, 681 (1992).
  3. R. B. Horne and R. M. Thorne, Geophys. Res. Lett. 30, 1527 (2003).
  4. J. L. Roeder, J. R. Benbrook, E. A. Bering, and W. R. Sheldon, J. Geophys. Res. 90, 10975 (1985).
  5. N. P. Meredith, M. Cain, R. B. Horne, R. M. Thorne, and R. R. Anderson, J. Geophys. Res. 108, 1248 (2003).
  6. M. J. LeDocq, D. A. Gurnett, and G. B. Hospodarsky, Geophys. Res. Lett. 25, 4063 (1998).
  7. M. Parrot, O. Santolik, N. Cornilleau-Wehrlin, M. Maksimovic, and C. Harvey, Ann. Geophys. 21, 473 (2003).
  8. R. A. Helliwell, Whistlers and Related Ionospheric Phenomena (Stanford University Press, Palo Alto, CA, 1965).
  9. R. A. Helliwell, J. Geophys. Res. 72, 4773 (1967).
  10. Y. Omura, D. Nunn, H. Matsumoto, and M. J. Rycroft, J. Atmos. Terr. Phys. 53, 351 (1991).
  11. D. Nunn, Y. Omura, H. Matsumoto, I. Nagano, and S. Yagitani, J. Geophys. Res. 102, 27083 (1997).
  12. V. Y. Trakhtengerts, Ann. Geophys. 17, 95 (1999).
  13. V. Y. Trakhtengerts, J. Geophys. Res. 100, 17205 (1995).
  14. N. S. Ginzburg and S. P. Kuznetsov, Relativistic HF Electronics (Inst. of Appl. Phys., Gorky, USSR, 1981), pp. 101–144, in Russian.
  15. V. Y. Trakhtengerts, M. J. Rycroft, and A. G. Demekhov, J. Geophys. Res. 101, 13293 (1996).
  16. A. G. Demekhov, D. Nunn, and V. Y. Trakhtengerts, Phys. Plasmas 10, 4472 (2003).
  17. D. Nunn, Comput. Phys. Commun. 60, 1 (1990).
  18. D. Nunn, A. G. Demekhov, V. Y. Trakhtengerts, and M. J. Rycroft, Ann. Geophys. 21, 481 (2003).
  19. D. Nunn, Planet. Space Sci. 22, 349 (1974).
  20. O. Santolik, D. A. Gurnett, J. S. Pickett, M. Parrot, and N. Cornilleau-Wehrlin, J. Geophys. Res. 108, 1278 (2003).
  21. O. Santolík and D. A. Gurnett, Geophys. Res. Lett. 30, 1031 (2003).
  22. J. F. Heagy, N. Platt, and S. M. Hammel, Phys. Rev. E 49, 1140 (1994).
  23. B. V. Kozelov, E. E. Titova, A. A. Lubchich, V. Y. Trakhtengerts, and J. Manninen, Geomagn. Aeron. 43, 593 (2003).
  24. See EPAPS Document No. E-PHPAEN-11-032404 for color versions of Figs. 3, 5, and 6 of this paper. A direct link to this document may be found in the online article's HTML reference section. The document may also be reached via the EPAPS homepage (http://www.aip.org/pubservs/epaps.html) or from ftp.aip.org in the directory /epaps/. See the EPAPS homepage for more information. [EPAPS]

CITING ARTICLES
For access to citing articles, you need to log in.
For access to citing articles, you need to Log in.


Copyright © American Institute of Physics