Effect of bremsstrahlung radiation emission on fast electrons in plasmas
Bremsstrahlung radiation emission is an important energy loss mechanism for energetic electrons in plasmas. In this paper we investigate the effect of spontaneous bremsstrahlung emission on the momentum−space structure of the electron distribution, fully accounting for the emission of finite−energy...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2016-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/18/9/093023 |
| _version_ | 1797750972665036800 |
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| author | O Embréus A Stahl T Fülöp |
| author_facet | O Embréus A Stahl T Fülöp |
| author_sort | O Embréus |
| collection | DOAJ |
| description | Bremsstrahlung radiation emission is an important energy loss mechanism for energetic electrons in plasmas. In this paper we investigate the effect of spontaneous bremsstrahlung emission on the momentum−space structure of the electron distribution, fully accounting for the emission of finite−energy photons by modeling the bremsstrahlung interactions with a Boltzmann collision operator. We find that electrons accelerated by electric fields can reach significantly higher energies than predicted by the commonly used radiative stopping−power model. Furthermore, we show that the emission of soft photons can contribute significantly to the dynamics of electrons with an anisotropic distribution by causing pitch−angle scattering at a rate that increases with energy. |
| first_indexed | 2024-03-12T16:41:33Z |
| format | Article |
| id | doaj.art-8714a97d4a13402c9b8b69409c877009 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:41:33Z |
| publishDate | 2016-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-8714a97d4a13402c9b8b69409c8770092023-08-08T14:30:14ZengIOP PublishingNew Journal of Physics1367-26302016-01-0118909302310.1088/1367-2630/18/9/093023Effect of bremsstrahlung radiation emission on fast electrons in plasmasO Embréus0A Stahl1T Fülöp2Department of Physics, Chalmers University of Technology , Gothenburg, SwedenDepartment of Physics, Chalmers University of Technology , Gothenburg, SwedenDepartment of Physics, Chalmers University of Technology , Gothenburg, SwedenBremsstrahlung radiation emission is an important energy loss mechanism for energetic electrons in plasmas. In this paper we investigate the effect of spontaneous bremsstrahlung emission on the momentum−space structure of the electron distribution, fully accounting for the emission of finite−energy photons by modeling the bremsstrahlung interactions with a Boltzmann collision operator. We find that electrons accelerated by electric fields can reach significantly higher energies than predicted by the commonly used radiative stopping−power model. Furthermore, we show that the emission of soft photons can contribute significantly to the dynamics of electrons with an anisotropic distribution by causing pitch−angle scattering at a rate that increases with energy.https://doi.org/10.1088/1367-2630/18/9/093023runaway electronsbremsstrahlungBoltzmann equationFokker−Planck equation |
| spellingShingle | O Embréus A Stahl T Fülöp Effect of bremsstrahlung radiation emission on fast electrons in plasmas New Journal of Physics runaway electrons bremsstrahlung Boltzmann equation Fokker−Planck equation |
| title | Effect of bremsstrahlung radiation emission on fast electrons in plasmas |
| title_full | Effect of bremsstrahlung radiation emission on fast electrons in plasmas |
| title_fullStr | Effect of bremsstrahlung radiation emission on fast electrons in plasmas |
| title_full_unstemmed | Effect of bremsstrahlung radiation emission on fast electrons in plasmas |
| title_short | Effect of bremsstrahlung radiation emission on fast electrons in plasmas |
| title_sort | effect of bremsstrahlung radiation emission on fast electrons in plasmas |
| topic | runaway electrons bremsstrahlung Boltzmann equation Fokker−Planck equation |
| url | https://doi.org/10.1088/1367-2630/18/9/093023 |
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