 |
| Titel |
In situ spacecraft observations of suprathermal ion acceleration in the reconnection jet braking region |
| VerfasserIn |
Alessandro Retino, Andris Vaivads, Yuri Khotyaintsev, Olivier LeContel, Huishan Fu, Bertalan Zieger, Rumi Nakamura, Anton Artemyev, Elena Kronberg |
| Konferenz |
EGU General Assembly 2015
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250111233
|
| Publikation (Nr.) |
 EGU/EGU2015-11323.pdf |
|
|
|
|
|
| Zusammenfassung |
| Reconnection jet fronts and jet braking regions are sites of strong particle energization in space and astrophysical
plasmas. Jet fronts are the boundaries separating ambient from reconnection jets while braking regions is where
jets are eventually stopped/diverted. Examples are jet fronts and braking regionscan be found in planetary
magnetospheres, loop-top regions in the solar corona during flares and astrophysical jets. Jet braking regions
have been also recently reproduced in laboratory experiments. A number of recent in situ observations in the
Earth’s magnetotail have allowed studying in detail electron energization mechanisms at jet fronts/braking regions.
Yet, observations of suprathermal ions are scarce. Here we show Cluster spacecraft observations in the
near-Earth jet braking region of suprathermal protons and oxygen up to ~ 1 MeV, that is about 10 times their
thermal energy. Observations indicate that ions are trapped between large-scale oppositely-directed jets and
accelerated therein by strong electric fields. We discuss possible applications of this acceleration mechanism to
solar and other astrophysical plasmas. |
|
|
|
|
|
|