Evidence for particle acceleration in the magnetospheric cusp
New evidence reveals that the charged particles can be energized locally in the magnetospheric cusp. The power spectral density of the cusp magnetic fluctuations shows increases by up to four orders of magnitude in comparison to an adjacent region. Large fluctuations of the cusp electric fields...
| Main Author: | |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2008-07-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/26/1993/2008/angeo-26-1993-2008.pdf |
| _version_ | 1818561454096252928 |
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| author | J. Chen |
| author_facet | J. Chen |
| author_sort | J. Chen |
| collection | DOAJ |
| description | New evidence reveals that
the charged particles can be energized locally in the magnetospheric cusp.
The power spectral density of the cusp magnetic fluctuations shows
increases by up to four orders of magnitude in comparison to an adjacent
region. Large fluctuations of the cusp electric fields have been observed
with an amplitude of up to 350 mV/m.
The measured left-hand polarization of the cusp electric field at ion
gyro-frequencies indicates that the cyclotron resonant acceleration mechanism
is working in this region. The cyclotron resonant acceleration can energize
ions from keV to MeV in seconds. |
| first_indexed | 2024-12-14T00:51:04Z |
| format | Article |
| id | doaj.art-bff01cf9b11c4e8bb43522812c0542fd |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-14T00:51:04Z |
| publishDate | 2008-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-bff01cf9b11c4e8bb43522812c0542fd2022-12-21T23:23:50ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762008-07-01261993199710.5194/angeo-26-1993-2008Evidence for particle acceleration in the magnetospheric cuspJ. Chen0Dept. of Astronomy & Center for Space Physics, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USANew evidence reveals that the charged particles can be energized locally in the magnetospheric cusp. The power spectral density of the cusp magnetic fluctuations shows increases by up to four orders of magnitude in comparison to an adjacent region. Large fluctuations of the cusp electric fields have been observed with an amplitude of up to 350 mV/m. The measured left-hand polarization of the cusp electric field at ion gyro-frequencies indicates that the cyclotron resonant acceleration mechanism is working in this region. The cyclotron resonant acceleration can energize ions from keV to MeV in seconds.https://www.ann-geophys.net/26/1993/2008/angeo-26-1993-2008.pdf |
| spellingShingle | J. Chen Evidence for particle acceleration in the magnetospheric cusp Annales Geophysicae |
| title | Evidence for particle acceleration in the magnetospheric cusp |
| title_full | Evidence for particle acceleration in the magnetospheric cusp |
| title_fullStr | Evidence for particle acceleration in the magnetospheric cusp |
| title_full_unstemmed | Evidence for particle acceleration in the magnetospheric cusp |
| title_short | Evidence for particle acceleration in the magnetospheric cusp |
| title_sort | evidence for particle acceleration in the magnetospheric cusp |
| url | https://www.ann-geophys.net/26/1993/2008/angeo-26-1993-2008.pdf |
| work_keys_str_mv | AT jchen evidenceforparticleaccelerationinthemagnetosphericcusp |