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Bootstrap energization of relativistic electrons in magnetized plasmas

Published online by Cambridge University Press:  01 September 2008

Ilan Roth
Ilan Roth*
Affiliation:
Space Sciences, University of California at Berkeley, Berkeley, CA 94720, USA email: ilan@ssl.berkeley.edu
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Abstract

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In situ and remote observations indicate that relativistic or ultra relativistic electrons are formed at various magnetized configurations. It is suggested that a specific bootstrap mechanism operates in some of these environments. The mechanism applies to (a) relativistic electrons observed on localized field lines in outer radiation belt - through a process initiated at a distant substorm injection; (b) relativistic electrons observed at the interplanetary medium - through a process initiated via coronal injection, at large distances from flares or propagating CME; (c) ultra-relativistic electrons deduced at the galactic jets - through a process initiated via local injection at the small-scale magnetic field. The injected nonisotropic electrons excite whistler waves which boost efficiently the tail of the electron distribution.

Keywords

acceleration of particlesplasmasjetsradiation mechanisms: nonthermal
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S257: Universal Heliophysical Processes , September 2008 , pp. 457 - 463
Copyright
Copyright © International Astronomical Union 2009

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