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Magnetospheric Multiscale Satellite Observations of Parallel Electron Acceleration in Magnetic Field Reconnection by Fermi Reflection from Time Domain Structures

Abstract : The same time domain structures (TDS) have been observed on two Magnetospheric Multiscale Satellites near Earth’s dayside magnetopause. These TDS, traveling away from the X line along the magnetic field at 4000  km/s, accelerated field-aligned ∼5  eV electrons to ∼200  eV by a single Fermi reflection of the electrons by these overtaking barriers. Additionally, the TDS contained both positive and negative potentials, so they were a mixture of electron holes and double layers. They evolve in ∼10  km of space or 7 ms of time and their spatial scale size is 10–20 km, which is much larger than the electron gyroradius (<1  km) or the electron inertial length (4 km at the observation point, less nearer the X line).
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Submitted on : Monday, September 13, 2021 - 3:47:10 PM
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F. s. Mozer, O. a. Agapitov, A. Artemyev, J. l. Burch, R. e. Ergun, et al.. Magnetospheric Multiscale Satellite Observations of Parallel Electron Acceleration in Magnetic Field Reconnection by Fermi Reflection from Time Domain Structures. Physical Review Letters, American Physical Society, 2016, 116 (14), ⟨10.1103/PhysRevLett.116.145101⟩. ⟨insu-03342784⟩

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