DOI: 10.1002/2014GL059553
论文题名: First optical observations of energetic electron precipitation at 4278 Å caused by a powerful VLF transmitter
作者: Denton M.H. ; Kosch M.J. ; Borovsky J.E. ; Clilverd M.A. ; Friedel R.H.W. ; Ulich T.
刊名: Geophysical Research Letters
ISSN: 0094-10187
EISSN: 1944-9918
出版年: 2014
卷: 41, 期: 7 起始页码: 2237
结束页码: 2242
语种: 英语
英文关键词: radiation belts
; VLF
Scopus关键词: Electron scattering
; Optical signal processing
; Radiation belts
; Electron population
; Electron precipitation
; Energetic electron
; Energetic electron precipitation
; Optical observations
; Transmission frequencies
; VLF
; Wave-particle interactions
; Transmitters
; electron
; magnetosphere
; precipitation (climatology)
; signal
; spatiotemporal analysis
; zenith angle
英文摘要: A summary is presented of experimental optical observations at 4278 Å from close to a powerful (~150 kW) VLF transmitter (call sign JXN) with a transmission frequency of 16.4 kHz. Approximately 2.5 s after transmitter turn-on, a sudden increase in optical emissions at 4278 Å was detected using a dedicated camera/charge-coupled device (CCD) monitoring system recording at a frequency of 10 Hz the optical signal is interpreted as a burst of electron precipitation lasting ~0.5 s, due to gyro-resonant wave-particle interactions between the transmitted wave and the magnetospheric electron population the precipitation was centered on the zenith and had no detectable spatial structure the timing of this sequence of events is in line with theoretical predictions and previous indirect observations of precipitation. This first direct measurement of VLF-induced precipitation at 4278 Å reveals the spatial and temporal extent of the resulting optical signal close to the transmitter. Key Points Energetic electrons detected at turn-on of high-power VLF transmitter All-sky burst of electrons lasts at least 0.5-s First direct optical confirmation of electron precipitation at 4278 Å ©2014 the Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84897220083&doi=10.1002%2f2014GL059553&partnerID=40&md5=600bd26ffc7be0f4985bbe2b64d9a54c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7451
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics, Lancaster University, Lancaster, United Kingdom
Recommended Citation:
Denton M.H.,Kosch M.J.,Borovsky J.E.,et al. First optical observations of energetic electron precipitation at 4278 Å caused by a powerful VLF transmitter[J]. Geophysical Research Letters,2014-01-01,41(7).