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Non-neutral field-aligned current sheet and the auroral electric field |
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| Affiliation: | 1. Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanov St, 603950 Nizhny Novgorod, Russia;2. National Research University Higher School of Economics, 25/12 Bolshaia Pecherskaja Ulitsa 603155, Nizhny Novgorod, Russia;3. Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK;1. Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin, 150001, China;2. Hefei Keye Electrical Physical Equipment Manufacturing Co., Ltd., Hefei, 230088, China;3. Department of Electrical Engineering, Harbin Institute of Technology, Harbin, 150001, China;4. Beijing Orient Institute of Measurement & Test, Beijing, 100000, China;5. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China |
| Abstract: | Equilibrium configurations of the non-neutral field-aligned electron current sheet in a Maxwellian plasma are obtained from solutions of the time-independent Vlasov-Maxwell equations. This is the first field-aligned non-neutral current sheet model in a hot plasma in which the electrons are allowed to be nonadiabatic. The current in this model has a perpendicular (i.e. diamagnetic) as well as a parallel component to the external magnetic field. The electric field of the current sheet is pointing normally toward the midplane of the sheet. This zeroth-order perpendicular electric field is identified as the primary electric field which gives rise to a few keV potential drop along auroral field lines. |
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