Confinement and anisotropy of ultrahigh-energy cosmic rays in isotropic plasma wave turbulence
- Context: The mean free path and anisotropy of galactic cosmic rays (CR) is calculated in weak plasma wave turbulence that is isotropically distributed with respect to the ordered uniform magnetic field. Aims: The modifications on the value of the Hillas energy, above which CR are not confined to the Galaxy, are calculated. The original determination of the Hillas limit has been based on the case of slab turbulence where only parallel propagating plasma waves are allowed. Methods: We use quasilinear Fokker-Planck coefficients to calculate the mean free path and the anisotropy in isotropic plasma wave turbulence. Results: In isotropic plasma wave turbulence the Hillas limit is enhanced by about four orders of magnitude to E\(_{c}\) =2.03 \(\bullet\) 10\(^{4}\) An_e \(^{1/2}\)(L\(_{max}\) /1 pc) resulting from the dominating influence of transit-time damping interactions that obliquely propagating magnetosonic waves undergo with cosmic rays.
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| Author: | Miroslava Vukčević |
|---|---|
| URN: | urn:nbn:de:hbz:294-20362 |
| Referee: | Reinhard SchlickeiserORCiDGND, Horst FichtnerORCiDGND |
| Document Type: | Doctoral Thesis |
| Language: | English |
| Date of Publication (online): | 2007/11/13 |
| Date of first Publication: | 2007/11/13 |
| Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
| Granting Institution: | Ruhr-Universität Bochum, Fakultät für Physik und Astronomie |
| Date of final exam: | 2007/10/25 |
| Creating Corporation: | Fakultät für Physik und Astronomie |
| GND-Keyword: | Kosmische Strahlung; Anisotropie; Turbulenz; Plasmawelle; Fokker-Planck-Gleichung |
| Dewey Decimal Classification: | Naturwissenschaften und Mathematik / Astronomie, Kartographie, Geodäsie |
| Licence (German): |  Keine Creative Commons Lizenz - es gelten der Veröffentlichungsvertrag und das deutsche Urheberrecht |
