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P. Bespalov; O. Savina (2017)
Publisher: Copernicus Publications
Journal: Annales Geophysicae
Languages: English
Types: Article
Subjects: Geophysics. Cosmic physics, Q, Science, Physics, QC1-999, QC801-809
We propose a simple explanation of the prolonged existence of pancake-like electron velocity distributions in the radiation belts. The pancake-like distribution function is characterized by a longitudinal particle velocity (along the magnetic field) of the order of the thermal velocity of the background plasma. The parameters of the tablet-like distribution function with a characteristic longitudinal particle velocity of the order of 20 Alfvèn velocities are refined. Such distribution functions can occur in the middle magnetosphere near the magnetic equator with appropriate sources of energetic particles. The stability of these distributions is examined. The results agree with known experimental data.
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    • Albert, J. M., Starks, M. J., Horne, R. B., Meredith, N. P., and Glauert, S. A.: Quasi-linear simulations of inner radiation belt electron pitch angle and energy distributions, Geophys. Res. Lett., 43, 2381-2388, doi:10.1002/2016GL067938, 2016.
    • Asnes, A., Stadsnes, J., Friedel, R. W., Ostgaard, N., and Thomsen, M.: Medium energy pitch angle distribution during substorm injected electron clouds, Geophys. Res. Lett., 32, L10101, doi:10.1029/2004GL022008, 2005.
    • Bell, T. F., Inan U. S., Helliwell, R. A., and Scudder J. D.: Simultaneous triggered VLF emissions and energetic electron distributions observed on POLAR with PWI and HYDRA, Geophys. Res. Lett., 27, 165-168, doi:10.1029/1999GL003673, 2000.
    • Bespalov, P. A. and Trakhtengerts, V. Y.: Cyclotron instability of the Earth radiation belts, Reviews of Plasma Physics, 10, 155-292, Consultants Bureau, New York, USA, 1986.
    • Christiansen, P. J., Gough, M. P., Martelli, G., Bloch, J. J., Cornillean, N., Etcheto, J., Gendrin, R., Beghin, C., and Decreau, P.: GEOS-1 observations of electrostatic waves, and their relationship with plasma parameters, Space Sci. Rev., 22, 383-400, doi:10.1007/BF00210875, 1978.
    • Goldstein, B. E. and Tsurutani, B. T.: Wave normal direction of chorus near the equatorial source region, J. Geophys. Res., 89, 2789-2810, doi:10.1029/JA089iA05p02789, 1984.
    • Gospodchikov, E. D., Smolyakova, O. B., and Suvorov, E. V.: Ray trajectories and electron cyclotron absorption in an axisymmetric magnetic confinement system, Plasma Phys. Rep., 33, 427-434, doi:10.1134/S1063780X0705008X, 2007.
    • Hikishima, M., Yagitani, S., Omura, Y., and Nagano, I.: Coherent nonlinear scattering of energetic electrons in the process of whistler mode chorus generation, J. Geophys. Res., 114, A10205, doi:10.1029/2009JA014371, 2009.
    • Manninen, J., Kleimenova, N. G., Fedorenko, Yu. V., Bespalov, P. A., and Turunen, T.: New results of structured VLF emissions observed simultaneously at two closely located stations near L 5:5, Ann. Geophys., 32, 1163-1167, doi:10.5194/angeo-32- 1163-2014, 2014.
    • Persoon, A. M., Gurnett, D. A., Santolik, O., Kurth, W. S., Faden, J. B., Groene, J. B., Lewis, G. R., Coates, A. J., Wilson, R. J., Tokar, R. L., Wahlund, J.-E., and Moncuquet, M.: A diffusive equilibrium model for the plasma density in Saturn's magnetosphere, J. Geophys. Res., 114, A04211, doi:10.1029/2008JA013912, 2009.
    • Schriver, D., Ashour-Abdalla, M., Coroniti, F. V., LeBoeuf, J. N., Decyk, V., Travnicek, P., Santolik, O., Winningham, D., Pickett, J. S., Goldstein, M. L., and Fazakerley, V.: Generation of whistler mode emissions in the inner magnetosphere: An event study, J. Geophys. Res., 115, A00F17, doi:10.1029/2009JA014932, 2010.
    • Su, Z., Gao, Z., Zhu, H., Li, W., Zheng, H., Wang, Y., Wang, S., Spence, H. E, Reeves, G. D., Baker, D. N., Blake, J. B., Funsten, H. O., and Wygant, J. R.: Nonstorm time dropout of radiation belt electron fluxes on 24 September 2013, J. Geophys. Res.-Space, 121 , 6400-6416, doi:10.1002/2016JA022546, 2016.
    • Thorne, R. M., Li, W., Ni, B. , Ma, Q., Bortnik, J., Chen, L., Baker, D. N., Spence, H. E., Reeves, G. D., Henderson, M. G., Kletzing, C. A., Kurth, W. S., Hospodarsky, G. B., Blake, J. B., Fennell, J. F., Claudepierre, S. G., and Kanekal, S. G.: Rapid local acceleration of relativistic radiation-belt electrons by magnetospheric chorus, Nature, 504 , 411-414, doi:10.1038/nature12889, 2013.
    • Trakhtengerts, V. Y., Demekhov, A. G., Pasmanik, D. L., Titova, E. E., Kozelov, B. V., Nunn, D., and Rycroft, M. J.: Highly anisotropic distributions of energetic electrons and triggered VLF emissions, Geophys. Res. Lett., 28, 2577-2580, doi:10.1029/2001GL013028, 2001.
    • Yang, C., Su, Z., Xiao, F., Zheng, H., Wang, Y., Wang, S., Spence, H. E., Reeves, G. D., Baker, D. N., Blake, J. B., and Funsten, H. O.: Rapid flattening of butterfly pitch angle distributions of radiation belt electrons by whistler-mode chorus, Geophys. Res. Lett., 43, 8339-8347, doi:10.1002/2016GL070194, 2016.
    • Zhelezniakov, V. V. and Zlotnik, E. I.: Cyclotron lines in the spectra of solar flares and solar active regions, Sol. Phys., 121, 449-456, doi:10.1007/BF00161712, 1989.
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