Confining the high-energy cosmic rays
<p style="text-align:justify;"> Diffusive shock acceleration is the prime candidate for efficient acceleration of cosmic rays. Galactic cosmic rays are believed to originate predominantly from this process in supernova remnant shock waves. Confinement of the cosmic rays in the shock...
| Main Authors: | , |
|---|---|
| Format: | Journal article |
| Published: |
Italian Astronomical Society
2011
|
| _version_ | 1797079053496221696 |
|---|---|
| author | Schure, K Bell, A |
| author_facet | Schure, K Bell, A |
| author_sort | Schure, K |
| collection | OXFORD |
| description | <p style="text-align:justify;"> Diffusive shock acceleration is the prime candidate for efficient acceleration of cosmic rays. Galactic cosmic rays are believed to originate predominantly from this process in supernova remnant shock waves. Confinement of the cosmic rays in the shock region is key in making the mechanism effective. It has been known that on small scales (smaller than the typical gyroradius) high-amplitude non-resonant instabilities arise due to cosmic ray streaming ahead of the shock. For the efficiency of scattering of the highest energy cosmic rays it is of interest to determine the type of instabilities that act on longer length scales, i.e. larger than the cosmic ray gyroradius. We will present the results of our analysis of an instability that acts in this regime and will discuss its driving mechanism and typical growth times. </p> |
| first_indexed | 2024-03-07T00:40:09Z |
| format | Journal article |
| id | oxford-uuid:82c53a36-216e-4db9-b4c1-1df19b064378 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:40:09Z |
| publishDate | 2011 |
| publisher | Italian Astronomical Society |
| record_format | dspace |
| spelling | oxford-uuid:82c53a36-216e-4db9-b4c1-1df19b0643782022-03-26T21:39:38ZConfining the high-energy cosmic raysJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:82c53a36-216e-4db9-b4c1-1df19b064378Symplectic Elements at OxfordItalian Astronomical Society2011Schure, KBell, A <p style="text-align:justify;"> Diffusive shock acceleration is the prime candidate for efficient acceleration of cosmic rays. Galactic cosmic rays are believed to originate predominantly from this process in supernova remnant shock waves. Confinement of the cosmic rays in the shock region is key in making the mechanism effective. It has been known that on small scales (smaller than the typical gyroradius) high-amplitude non-resonant instabilities arise due to cosmic ray streaming ahead of the shock. For the efficiency of scattering of the highest energy cosmic rays it is of interest to determine the type of instabilities that act on longer length scales, i.e. larger than the cosmic ray gyroradius. We will present the results of our analysis of an instability that acts in this regime and will discuss its driving mechanism and typical growth times. </p> |
| spellingShingle | Schure, K Bell, A Confining the high-energy cosmic rays |
| title | Confining the high-energy cosmic rays |
| title_full | Confining the high-energy cosmic rays |
| title_fullStr | Confining the high-energy cosmic rays |
| title_full_unstemmed | Confining the high-energy cosmic rays |
| title_short | Confining the high-energy cosmic rays |
| title_sort | confining the high energy cosmic rays |
| work_keys_str_mv | AT schurek confiningthehighenergycosmicrays AT bella confiningthehighenergycosmicrays |