Abstract
During the magnetic storm of 21st March 1990, the DE-1 spacecraft encountered the auroral region at high invariant latitude at altitudes ranging from a few thousand kilometers in the ionosphere to many earth radii in the magnetosphere. The magnetic field perturbations interpretable as field aligned current (FAC) layers and the electrostatic turbulence possibly due to electrostatic ion acoustic instability driven by these currents are shown. The critical drift velocity of Hot Plasma Torus (HPT) electrons and the growth rate of ion acoustic wave as a function of electron to ion temperature ratio (T e/Ti) for low and high current densities and energy of HPT electrons are found out. The intense FAC destabilizes the ion acoustic wave and the resultant electrostatic turbulence creates an anomalous resistivity. The current driven resistivity produces parallel electric field and high power dissipation. The anomalous resistivityη, potential difference along the auroral field lines Vt|, intensity of electric field turbulenceE t| and power produced per unit volumeP are computed. It is found that the change in westward magnetic perturbation increasesJ t|, η, Vt|, Et| andP. Hence HPT electrons are heated and accelerated due to power dissipation during magnetically active periods in the auroral region. Concerning, applications, such HPT electrons can be used in particle accelerators like electron ring accelerator, smokatron etc.
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References
Birkeland K 1908 On the cause of magnetic storms and the origin of terrestrial magnetism; In:The Norwegian Aurora Polaris expedition 1902-03 (ed) H Aschehoug, vol.I (Oslo, Norway)
Fredricks R W and Scarf F L 1973 Field aligned currents, plasma waves and anomalous resistivity in the disturbed polar cusp;J. Geophys. Res. 78 2133–2141
Galeev A A and Sagdeev R Z 1984 Current instabilities and anomalous resistivity of plasma; In:Hand book of plasma physics (eds) A A Galeev and R N Sudan, Vol.II (Amsterdam, North Holland) pp 271–303
Gurnett D A and Frank L A 1977 A region of intense plasma wave turbulence on auroral field lines;J. Geophys. Res. 82 1031–1050
Hasegawa A 1975 Plasma instabilities and nonlinear effects; In:Physics and Chemistry in space (eds) J G Roederer and J T Wasson Vol.VIII (NewYork: Springer) pp 62
Iijima T and Potemra T A 1976 The amplitude distribution of field aligned currents at northern high latitudes observed by TRIAD;J. Geophys. Res. 81 2165–2174
Kindel J M and Kennel C F 1971 Topside current instabilities;J. Geophys. Res. 76 3055–3078
Lyatsky W and Hamza A M 2001 Possible role of ion demagnetization in the plasma sheet in auroral arc and substorm generation;Space Sci. Rev. 95 373–85
Maru, Harsha, Kumar, Sushil and Gwal A K 1999 Role of field aligned currents and parallel electric field on the generation of whistler mode instability in the earth’s magnetosphere;Indian J. Radio Space Phys. 28 95–102
Mozer F S 1976 Anomalous resistivity and parallel electric fields; In:Magneto spheric particles and fields (ed) B M McCormac (Dordrecht, Holland: D. Reidel) pp 125–136
Papadopoulos K 1977 A review of anomalous resistivity for the ionosphere;Rev. Geophys. and Space Physics 15 113–127
Papadopoulos K and Coffey T 1974 Anomalous resistivity in the auroral plasma;J. Geophys. Res. 79 1558–1561
Potemra T A 1985 Field aligned currents;Space Sci. Rev. 42 295–311
Scarf F L, Fredricks R W, Russell C T, Kivelson M, Weugebauer M and Chappel C R 1973 Observation of a current driven plasma instability at the outer zone plasma sheet boundary;J. Geophys. Res. 78 2150–2165
Swift D W 1965 A mechanism for energizing electrons in the magnetosphere;J. Geophys. Res. 70 3061–3073
Treumann R A and Baumjohann W 1997 Electrostatic instabilities; In:Advanced Space Plasma Physics (London: Imperial College Press) pp 69–102
Yamamoto T, Inoue S, Nishitani N, Ozaki M and Meng C I 1996 A theory for generation of the paired region 1 and region 2 field aligned currents;J. Geophys. Res. 101 27199–27222
Zmuda A J and Armstrong J C 1974 The diurnal flow pattern of field aligned currents;J. Geophys. Res. 79 461–469
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Jayasree, C.S., Renuka, G. & Venugopal, C. Ion acoustic instability of HPT particles, FAC density, anomalous resistivity and parallel electric field in the auroral region. J Earth Syst Sci 112, 559–567 (2003). https://doi.org/10.1007/BF02709779
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DOI: https://doi.org/10.1007/BF02709779