DOI: 10.1002/2014GL059988
论文题名: The importance of monopole antennas for dust observations: Why Wind/WAVES does not detect nanodust
作者: Meyer-Vernet N. ; Moncuquet M. ; Issautier K. ; Lecacheux A.
刊名: Geophysical Research Letters
ISSN: 0094-10130
EISSN: 1944-9861
出版年: 2014
卷: 41, 期: 8 起始页码: 2716
结束页码: 2720
语种: 英语
英文关键词: dust detection
Scopus关键词: Dust
; Impact ionization
; Instruments
; Monopole antennas
; Spacecraft
; Dust detection
; Dust grains
; Interstellar dust
; Keypoints
; Monopole and dipole
; Non-detection
; Novel interpretation
; Pulse amplitude
; Signal detection
; antenna
; data interpretation
; detection method
; dust
; instrumentation
; interplanetary dust
; ionization
; particle size
; space technology
; spacecraft
英文摘要: The charge released by impact ionization of fast dust grains impinging on spacecraft is at the basis of a well-known technique for dust detection by wave instruments. Since most of the impact charges are recollected by the spacecraft, monopole antennas generally detect a much greater signal than dipoles. This is illustrated by comparing dust signals in monopole and dipole modes on different spacecraft and environments. It explains the weak sensitivity of Wind/WAVES dipole antennas for dust detection, so that it is not surprising that this instrument did not detect the interplanetary nanodust discovered by STEREO/WAVES. We propose an interpretation of the Wind dust data, elsewhere discussed by Malaspina et al. (2014), which explains the observed pulse amplitude and polarity for interstellar dust impacts, as well as the nondetection of nanodust. This proposed mechanism might be the dominant dust detection mechanism by some wave instruments using dipole antennas. Key Points We explain why Wind/WAVES cannot detect nanodust We propose a new technique for dust detection with dipole antennas We propose a novel interpretation of Wind/WAVES dust data ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84899037854&doi=10.1002%2f2014GL059988&partnerID=40&md5=94c254b5a96016ff665831bc8f5bbba9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7394
Appears in Collections: 气候减缓与适应
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作者单位: LESIA, CNRS, Université Paris Diderot, Meudon, France
Recommended Citation:
Meyer-Vernet N.,Moncuquet M.,Issautier K.,et al. The importance of monopole antennas for dust observations: Why Wind/WAVES does not detect nanodust[J]. Geophysical Research Letters,2014-01-01,41(8).