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Observations of electron distributions in magnetosheath mirror mode waves
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| Zeitschriftentitel: | Journal of Geophysical Research: Space Physics |
|---|---|
| Personen und Körperschaften: | , , , |
| In: | Journal of Geophysical Research: Space Physics, 103, 1998, A11, S. 26765-26774 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
|
| Schlagwörter: |
| author_facet |
Chisham, G. Burgess, D. Schwartz, S. J. Dunlop, M. W. Chisham, G. Burgess, D. Schwartz, S. J. Dunlop, M. W. |
|---|---|
| author |
Chisham, G. Burgess, D. Schwartz, S. J. Dunlop, M. W. |
| spellingShingle |
Chisham, G. Burgess, D. Schwartz, S. J. Dunlop, M. W. Journal of Geophysical Research: Space Physics Observations of electron distributions in magnetosheath mirror mode waves Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics |
| author_sort |
chisham, g. |
| spelling |
Chisham, G. Burgess, D. Schwartz, S. J. Dunlop, M. W. 0148-0227 American Geophysical Union (AGU) Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics http://dx.doi.org/10.1029/98ja02620 <jats:p>The behavior of the electron distribution function within mirror mode waves in the Earth's magnetosheath is studied using observations made by the electron experiment on Active Magnetospheric Particle Tracer Explorers United Kingdom Subsatellite (AMPTE UKS). The results of a detailed pitch angle analysis show that in the mirror mode troughs the electron distribution displays two distinct features related to particle trapping: (1) The “deeply” trapped electrons (those with pitch angles close to 90° in the magnetic field troughs) are significantly cooled with respect to the rest of the electron population and (2) the “shallowly” trapped electrons (those with pitch angles just greater than the critical pitch angle for trapping) are significantly heated with respect to the rest of the electron population. This is explained as a result of the trapped electron population undergoing a combination of Fermi acceleration and deceleration and betatron deceleration. The untrapped electron population appears to behave adiabatically as it travels alternately through mirror mode peaks and troughs. This behavior is confirmed by the use of Liouville mapping techniques, which also allow us to estimate the electric potential associated with the mirror mode wave.</jats:p> Observations of electron distributions in magnetosheath mirror mode waves Journal of Geophysical Research: Space Physics |
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10.1029/98ja02620 |
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Geologie und Paläontologie Geographie Chemie und Pharmazie Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft Biologie Allgemeine Naturwissenschaft Physik Technik |
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Journal of Geophysical Research: Space Physics |
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| title |
Observations of electron distributions in magnetosheath mirror mode waves |
| title_unstemmed |
Observations of electron distributions in magnetosheath mirror mode waves |
| title_full |
Observations of electron distributions in magnetosheath mirror mode waves |
| title_fullStr |
Observations of electron distributions in magnetosheath mirror mode waves |
| title_full_unstemmed |
Observations of electron distributions in magnetosheath mirror mode waves |
| title_short |
Observations of electron distributions in magnetosheath mirror mode waves |
| title_sort |
observations of electron distributions in magnetosheath mirror mode waves |
| topic |
Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics |
| url |
http://dx.doi.org/10.1029/98ja02620 |
| publishDate |
1998 |
| physical |
26765-26774 |
| description |
<jats:p>The behavior of the electron distribution function within mirror mode waves in the Earth's magnetosheath is studied using observations made by the electron experiment on Active Magnetospheric Particle Tracer Explorers United Kingdom Subsatellite (AMPTE UKS). The results of a detailed pitch angle analysis show that in the mirror mode troughs the electron distribution displays two distinct features related to particle trapping: (1) The “deeply” trapped electrons (those with pitch angles close to 90° in the magnetic field troughs) are significantly cooled with respect to the rest of the electron population and (2) the “shallowly” trapped electrons (those with pitch angles just greater than the critical pitch angle for trapping) are significantly heated with respect to the rest of the electron population. This is explained as a result of the trapped electron population undergoing a combination of Fermi acceleration and deceleration and betatron deceleration. The untrapped electron population appears to behave adiabatically as it travels alternately through mirror mode peaks and troughs. This behavior is confirmed by the use of Liouville mapping techniques, which also allow us to estimate the electric potential associated with the mirror mode wave.</jats:p> |
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| author | Chisham, G., Burgess, D., Schwartz, S. J., Dunlop, M. W. |
| author_facet | Chisham, G., Burgess, D., Schwartz, S. J., Dunlop, M. W., Chisham, G., Burgess, D., Schwartz, S. J., Dunlop, M. W. |
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| description | <jats:p>The behavior of the electron distribution function within mirror mode waves in the Earth's magnetosheath is studied using observations made by the electron experiment on Active Magnetospheric Particle Tracer Explorers United Kingdom Subsatellite (AMPTE UKS). The results of a detailed pitch angle analysis show that in the mirror mode troughs the electron distribution displays two distinct features related to particle trapping: (1) The “deeply” trapped electrons (those with pitch angles close to 90° in the magnetic field troughs) are significantly cooled with respect to the rest of the electron population and (2) the “shallowly” trapped electrons (those with pitch angles just greater than the critical pitch angle for trapping) are significantly heated with respect to the rest of the electron population. This is explained as a result of the trapped electron population undergoing a combination of Fermi acceleration and deceleration and betatron deceleration. The untrapped electron population appears to behave adiabatically as it travels alternately through mirror mode peaks and troughs. This behavior is confirmed by the use of Liouville mapping techniques, which also allow us to estimate the electric potential associated with the mirror mode wave.</jats:p> |
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| imprint | American Geophysical Union (AGU), 1998 |
| imprint_str_mv | American Geophysical Union (AGU), 1998 |
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| physical | 26765-26774 |
| publishDate | 1998 |
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| series | Journal of Geophysical Research: Space Physics |
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| spelling | Chisham, G. Burgess, D. Schwartz, S. J. Dunlop, M. W. 0148-0227 American Geophysical Union (AGU) Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics http://dx.doi.org/10.1029/98ja02620 <jats:p>The behavior of the electron distribution function within mirror mode waves in the Earth's magnetosheath is studied using observations made by the electron experiment on Active Magnetospheric Particle Tracer Explorers United Kingdom Subsatellite (AMPTE UKS). The results of a detailed pitch angle analysis show that in the mirror mode troughs the electron distribution displays two distinct features related to particle trapping: (1) The “deeply” trapped electrons (those with pitch angles close to 90° in the magnetic field troughs) are significantly cooled with respect to the rest of the electron population and (2) the “shallowly” trapped electrons (those with pitch angles just greater than the critical pitch angle for trapping) are significantly heated with respect to the rest of the electron population. This is explained as a result of the trapped electron population undergoing a combination of Fermi acceleration and deceleration and betatron deceleration. The untrapped electron population appears to behave adiabatically as it travels alternately through mirror mode peaks and troughs. This behavior is confirmed by the use of Liouville mapping techniques, which also allow us to estimate the electric potential associated with the mirror mode wave.</jats:p> Observations of electron distributions in magnetosheath mirror mode waves Journal of Geophysical Research: Space Physics |
| spellingShingle | Chisham, G., Burgess, D., Schwartz, S. J., Dunlop, M. W., Journal of Geophysical Research: Space Physics, Observations of electron distributions in magnetosheath mirror mode waves, Paleontology, Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Atmospheric Science, Earth-Surface Processes, Geochemistry and Petrology, Soil Science, Water Science and Technology, Ecology, Aquatic Science, Forestry, Oceanography, Geophysics |
| title | Observations of electron distributions in magnetosheath mirror mode waves |
| title_full | Observations of electron distributions in magnetosheath mirror mode waves |
| title_fullStr | Observations of electron distributions in magnetosheath mirror mode waves |
| title_full_unstemmed | Observations of electron distributions in magnetosheath mirror mode waves |
| title_short | Observations of electron distributions in magnetosheath mirror mode waves |
| title_sort | observations of electron distributions in magnetosheath mirror mode waves |
| title_unstemmed | Observations of electron distributions in magnetosheath mirror mode waves |
| topic | Paleontology, Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Atmospheric Science, Earth-Surface Processes, Geochemistry and Petrology, Soil Science, Water Science and Technology, Ecology, Aquatic Science, Forestry, Oceanography, Geophysics |
| url | http://dx.doi.org/10.1029/98ja02620 |