Pitch Angle Dependence of Energetic Electron Precipitation: Energy Deposition, Backscatter, and the Bounce Loss Cone
| Publication Date: |
2018-03-07
|
|---|---|
| Publisher: |
Wiley-Blackwell
|
| Print ISSN: |
0148-0227
|
| Topics: |
Geosciences
Physics
|
| Published by: |
| _version_ | 1836398832840081408 |
|---|---|
| autor | R. A. Marshall, J. Bortnik |
| beschreibung | Quantifying radiation belt precipitation and its consequent atmospheric effects requires an accurate assessment of the pitch angle distribution of precipitating electrons, as well as knowledge of the dependence of the atmospheric deposition on that distribution. Here, Monte Carlo simulations are used to investigate the effects of the incident electron energy and pitch angle on precipitation for bounce-period time scales, and the implications for both the loss from the radiation belts and the deposition in the upper atmosphere. Simulations are conducted at discrete energies and pitch angles to assess the dependence on these parameters of the atmospheric energy deposition profiles and to estimate the backscattered particle distributions. We observe that the atmospheric response is both energy and pitch angle dependent. These effects together result in an energy-dependent bounce loss cone angle, which can vary by 2–3 degrees with particle energy when considered at low-Earth orbit. This modeling also predicts that a significant fraction of the input electron distribution will be backscattered, and should be observable by low-Earth-orbiting satellites as field aligned beams emerging from the atmosphere at energies lower than the input distribution, and having pitch angles distributed just inside the loss cone. |
| citation_standardnr | 6196972 |
| datenlieferant | ipn_articles |
| feed_copyright | American Geophysical Union (AGU) |
| feed_copyright_url | http://www.agu.org/ |
| feed_id | 7531 |
| feed_publisher | Wiley-Blackwell |
| feed_publisher_url | http://www.wiley.com/wiley-blackwell |
| insertion_date | 2018-03-07 |
| journalissn | 0148-0227 |
| publikationsjahr_anzeige | 2018 |
| publikationsjahr_facette | 2018 |
| publikationsjahr_intervall | 7984:2015-2019 |
| publikationsjahr_sort | 2018 |
| publisher | Wiley-Blackwell |
| quelle | Journal of Geophysical Research JGR - Space Physics |
| relation | http://onlinelibrary.wiley.com/resolve/doi?DOI=10.1002%2F2017JA024873 |
| search_space | articles |
| shingle_author_1 | R. A. Marshall, J. Bortnik |
| shingle_author_2 | R. A. Marshall, J. Bortnik |
| shingle_author_3 | R. A. Marshall, J. Bortnik |
| shingle_author_4 | R. A. Marshall, J. Bortnik |
| shingle_catch_all_1 | Pitch Angle Dependence of Energetic Electron Precipitation: Energy Deposition, Backscatter, and the Bounce Loss Cone Quantifying radiation belt precipitation and its consequent atmospheric effects requires an accurate assessment of the pitch angle distribution of precipitating electrons, as well as knowledge of the dependence of the atmospheric deposition on that distribution. Here, Monte Carlo simulations are used to investigate the effects of the incident electron energy and pitch angle on precipitation for bounce-period time scales, and the implications for both the loss from the radiation belts and the deposition in the upper atmosphere. Simulations are conducted at discrete energies and pitch angles to assess the dependence on these parameters of the atmospheric energy deposition profiles and to estimate the backscattered particle distributions. We observe that the atmospheric response is both energy and pitch angle dependent. These effects together result in an energy-dependent bounce loss cone angle, which can vary by 2–3 degrees with particle energy when considered at low-Earth orbit. This modeling also predicts that a significant fraction of the input electron distribution will be backscattered, and should be observable by low-Earth-orbiting satellites as field aligned beams emerging from the atmosphere at energies lower than the input distribution, and having pitch angles distributed just inside the loss cone. R. A. Marshall, J. Bortnik Wiley-Blackwell 0148-0227 01480227 |
| shingle_catch_all_2 | Pitch Angle Dependence of Energetic Electron Precipitation: Energy Deposition, Backscatter, and the Bounce Loss Cone Quantifying radiation belt precipitation and its consequent atmospheric effects requires an accurate assessment of the pitch angle distribution of precipitating electrons, as well as knowledge of the dependence of the atmospheric deposition on that distribution. Here, Monte Carlo simulations are used to investigate the effects of the incident electron energy and pitch angle on precipitation for bounce-period time scales, and the implications for both the loss from the radiation belts and the deposition in the upper atmosphere. Simulations are conducted at discrete energies and pitch angles to assess the dependence on these parameters of the atmospheric energy deposition profiles and to estimate the backscattered particle distributions. We observe that the atmospheric response is both energy and pitch angle dependent. These effects together result in an energy-dependent bounce loss cone angle, which can vary by 2–3 degrees with particle energy when considered at low-Earth orbit. This modeling also predicts that a significant fraction of the input electron distribution will be backscattered, and should be observable by low-Earth-orbiting satellites as field aligned beams emerging from the atmosphere at energies lower than the input distribution, and having pitch angles distributed just inside the loss cone. R. A. Marshall, J. Bortnik Wiley-Blackwell 0148-0227 01480227 |
| shingle_catch_all_3 | Pitch Angle Dependence of Energetic Electron Precipitation: Energy Deposition, Backscatter, and the Bounce Loss Cone Quantifying radiation belt precipitation and its consequent atmospheric effects requires an accurate assessment of the pitch angle distribution of precipitating electrons, as well as knowledge of the dependence of the atmospheric deposition on that distribution. Here, Monte Carlo simulations are used to investigate the effects of the incident electron energy and pitch angle on precipitation for bounce-period time scales, and the implications for both the loss from the radiation belts and the deposition in the upper atmosphere. Simulations are conducted at discrete energies and pitch angles to assess the dependence on these parameters of the atmospheric energy deposition profiles and to estimate the backscattered particle distributions. We observe that the atmospheric response is both energy and pitch angle dependent. These effects together result in an energy-dependent bounce loss cone angle, which can vary by 2–3 degrees with particle energy when considered at low-Earth orbit. This modeling also predicts that a significant fraction of the input electron distribution will be backscattered, and should be observable by low-Earth-orbiting satellites as field aligned beams emerging from the atmosphere at energies lower than the input distribution, and having pitch angles distributed just inside the loss cone. R. A. Marshall, J. Bortnik Wiley-Blackwell 0148-0227 01480227 |
| shingle_catch_all_4 | Pitch Angle Dependence of Energetic Electron Precipitation: Energy Deposition, Backscatter, and the Bounce Loss Cone Quantifying radiation belt precipitation and its consequent atmospheric effects requires an accurate assessment of the pitch angle distribution of precipitating electrons, as well as knowledge of the dependence of the atmospheric deposition on that distribution. Here, Monte Carlo simulations are used to investigate the effects of the incident electron energy and pitch angle on precipitation for bounce-period time scales, and the implications for both the loss from the radiation belts and the deposition in the upper atmosphere. Simulations are conducted at discrete energies and pitch angles to assess the dependence on these parameters of the atmospheric energy deposition profiles and to estimate the backscattered particle distributions. We observe that the atmospheric response is both energy and pitch angle dependent. These effects together result in an energy-dependent bounce loss cone angle, which can vary by 2–3 degrees with particle energy when considered at low-Earth orbit. This modeling also predicts that a significant fraction of the input electron distribution will be backscattered, and should be observable by low-Earth-orbiting satellites as field aligned beams emerging from the atmosphere at energies lower than the input distribution, and having pitch angles distributed just inside the loss cone. R. A. Marshall, J. Bortnik Wiley-Blackwell 0148-0227 01480227 |
| shingle_title_1 | Pitch Angle Dependence of Energetic Electron Precipitation: Energy Deposition, Backscatter, and the Bounce Loss Cone |
| shingle_title_2 | Pitch Angle Dependence of Energetic Electron Precipitation: Energy Deposition, Backscatter, and the Bounce Loss Cone |
| shingle_title_3 | Pitch Angle Dependence of Energetic Electron Precipitation: Energy Deposition, Backscatter, and the Bounce Loss Cone |
| shingle_title_4 | Pitch Angle Dependence of Energetic Electron Precipitation: Energy Deposition, Backscatter, and the Bounce Loss Cone |
| timestamp | 2025-06-30T23:33:21.316Z |
| titel | Pitch Angle Dependence of Energetic Electron Precipitation: Energy Deposition, Backscatter, and the Bounce Loss Cone |
| titel_suche | Pitch Angle Dependence of Energetic Electron Precipitation: Energy Deposition, Backscatter, and the Bounce Loss Cone |
| topic | TE-TZ U |
| uid | ipn_articles_6196972 |