Magnetospheric Multiscale Satellite Observations of Parallel Electron Acceleration in Magnetic Field Reconnection by Fermi Reflection from Time Domain Structures.
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).
Space Sciences Laboratory, University of California, Berkeley, California 94720, USA.|Taras Shevchenko National University of Kyiv, Glushkova Avenue, 4, Kyiv 01601, Ukraine.|Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California 90002, USA.|Southwest Research Institute, San Antonio, Texas 78238, USA.|LASP, University of Colorado, Boulder, Colorado 80303, USA.|NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.|LPC2 E/CNRS-University of Orleans, Orleans 45100, France.|University of New Hampshire, Durham, New Hampshire 03824, USA.|Space Research Institute, Russian Academy of Science, Moscow, Russia 117342.
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Mozer
Space Sciences Laboratory, University of California, Berkeley, California 94720, USA.|Taras Shevchenko National University of Kyiv, Glushkova Avenue, 4, Kyiv 01601, Ukraine.
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Agapitov
Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California 90002, USA.|Space Research Institute, Russian Academy of Science, Moscow, Russia 117342.
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Artemyev
Southwest Research Institute, San Antonio, Texas 78238, USA.
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Burch
LASP, University of Colorado, Boulder, Colorado 80303, USA.
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Ergun
NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.
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Giles
LPC2 E/CNRS-University of Orleans, Orleans 45100, France.
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Mourenas
University of New Hampshire, Durham, New Hampshire 03824, USA.
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Torbert
Space Sciences Laboratory, University of California, Berkeley, California 94720, USA.
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Space Research Institute, Russian Academy of Science, Moscow, Russia 117342.
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