| 项目编号: | 1542608
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| 项目名称: | Collaborative Research: Analysis and Modeling of Nonlinear Wave-Particle Interactions from the Siple Transmitter Experiment |
| 作者: | Mark Golkowski
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| 承担单位: | University of Colorado at Denver
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| 批准年: | 2016
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| 开始日期: | 2016-08-01
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| 结束日期: | 2019-07-31
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| 资助金额: | 159580
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| 资助来源: | US-NSF
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| 项目类别: | Continuing grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Polar
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| 英文关键词: | wave
; energetic particle
; energetic electron
; radiation belts
; wave-particle
; siple transmitter experiment
; datum
; wave growth
; antarctic siple station
; whistler wave
; whistler wave interaction
; nonlinear wave-particle interaction
; active research
; type wave
; space weather research
; data analysis
; wave-particle interaction
; controlled experiment
; plasma wave
; air force research laboratory data-preservation award
; whistler-mode wave
; nonlinear interaction
; low frequency wave
; electromagnetic wave
; statistical analysis
; scientific researcher
; research project
; electromagnetic ion cyclotron wave
|
| 英文摘要: | The Siple Transmitter Experiment, operated in Antarctica from 1973 to 1988 under sponsorship from the National Science Foundation, provided scientific researchers with a heretofore unmatched opportunity to perform controlled experiments to study nonlinear wave-particle interactions. Very low frequency waves radiated by the transmitter at the Antarctic Siple Station propagated into the Earth?s magnetosphere where they interacted with the energetic electrons in the Radiation Belts. This interaction modified the waves, amplifying them and generating new rising and falling frequency components. The modified waves were observed with radio receivers on the ground at the Northern Hemisphere conjugate points of the same geomagnetic field line. These "triggered" waves bear similarities to naturally occurring "chorus" type waves that are a major driver of space weather processes. The data were recorded and later digitized under the Air Force Research Laboratory data-preservation award. Analyzing this legacy dataset with modern techniques and comparing observations to the latest numerical models will help resolve outstanding issues in space weather research.
Whistler-mode waves are the electromagnetic waves with frequency of about 100 Hz-30 kHz, observed in Earth?s magnetosphere, and they are one of the major factors significantly affecting the energetic electrons population in the Earth's Radiation Belts. Despite many decades of active research, important questions on the whistler waves interaction with energetic electrons in the Radiation Belts still remain unanswered, which does not allow us to predict reliably the intensity of energetic electron fluxes in the Radiation Belts. These fluxes of energetic particles may significantly affect spacecraft in the geostationary and low orbits, astronauts in the space station, as well space-based scientific, military, and communication satellites. This project will study previously accumulated collection of data from the Siple Transmitter Experiment. Statistical analysis of these data in combination with numerical simulations will be used to characterize the dynamics of nonlinear interactions of whistler waves with energetic particles, focusing on the wave growth and generation of newly triggered emissions. This data analysis will guide advanced numerical simulations of the wave-particle interactions in order to understand fundamental physical processes involved, such as generation of naturally occurring plasma waves called "chorus" and "hiss" and also electromagnetic ion cyclotron waves. This research project will enhance infrastructure for research and education through a strong collaboration between two academic institutions and contribute to the training of graduate and undergraduate students. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/91527
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Mark Golkowski. Collaborative Research: Analysis and Modeling of Nonlinear Wave-Particle Interactions from the Siple Transmitter Experiment. 2016-01-01.
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