Magnetic-field aligned electric fields in collisionless space plasmas a brief review
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional Autónoma de México
2004
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| _version_ | 1876482894763917312 |
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| author | Carl-Gunne Fälthammar |
| author_facet | Carl-Gunne Fälthammar |
| contents | Magnetic-field aligned electric fields in collisionless space plasmas a brief review Carl-Gunne Fälthammar Ciencias de la Tierra Magnetic field aligned parallel electric fields Magnetic-field aligned electric fields play an important role in the dynamics of magnetized plasmas. They allow decouplingof plasma elements by violation of the frozen field condition, breakdown of equipotential mapping, efficient acceleration ofcharged particles and rapid release of magnetic energy. In the collisionless plasmas that occupy most of the universe they used tobe assumed nonexistent. A major consequence of the in situ measurements of the space age was the recognition that such electricfields do exist in the collisionless space plasma in spite of the absence of collisional friction. Indications of their existence cameeven from ground observations, but the final proof rests on the overwhelming evidence accumulated by in situ observations. Theseinclude observations of a number of characteristic features of particle distribution functions, various active experiments and directmeasurements of electric fields. A number of mechanisms that can support magnetic field aligned electric fields have been identified.They include wave turbulence, solitary structures, magnetic mirrors, electric double layers and dynamic trapping. Some ofthem have been observationally confirmed to be important in the auroral process, but their relative roles are still not well known. 2004 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56843210 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.43 |
| format | Artículo científico |
| id | redalyc_56843210 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Magnetic-field aligned electric fields in collisionless space plasmas a brief review Carl-Gunne Fälthammar Ciencias de la Tierra Magnetic field aligned parallel electric fields Magnetic-field aligned electric fields in collisionless space plasmas a brief review Carl-Gunne Fälthammar Ciencias de la Tierra Magnetic field aligned parallel electric fields Magnetic-field aligned electric fields play an important role in the dynamics of magnetized plasmas. They allow decouplingof plasma elements by violation of the frozen field condition, breakdown of equipotential mapping, efficient acceleration ofcharged particles and rapid release of magnetic energy. In the collisionless plasmas that occupy most of the universe they used tobe assumed nonexistent. A major consequence of the in situ measurements of the space age was the recognition that such electricfields do exist in the collisionless space plasma in spite of the absence of collisional friction. Indications of their existence cameeven from ground observations, but the final proof rests on the overwhelming evidence accumulated by in situ observations. Theseinclude observations of a number of characteristic features of particle distribution functions, various active experiments and directmeasurements of electric fields. A number of mechanisms that can support magnetic field aligned electric fields have been identified.They include wave turbulence, solitary structures, magnetic mirrors, electric double layers and dynamic trapping. Some ofthem have been observationally confirmed to be important in the auroral process, but their relative roles are still not well known. 2004 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56843210 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.43 |
| title | Magnetic-field aligned electric fields in collisionless space plasmas a brief review |
| topic | Ciencias de la Tierra Magnetic field aligned parallel electric fields |
| url | https://www.redalyc.org/articulo.oa?id=56843210 |