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DOI | 10.1002/2016GL071457 |
Stair-step particle flux spectra on the lunar surface: Evidence for nonmonotonic potentials? | |
Collier, Michael R.1,2; Newheart, Anastasia3; Poppe, Andrew R.2,4; Hills, H. Kent1,5; Farrell, William M.1,2 | |
2017 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We present examples of unusual stair-step differential flux spectra observed by the Apollo 14 Suprathermal Ion Detector Experiment on the lunar dayside surface in Earth's magnetotail. These spectra exhibit a relatively constant differential flux below some cutoff energy and then drop off precipitously, by about an order of magnitude or more, at higher energies. We propose that these spectra result from photoions accelerated on the lunar dayside by nonmonotonic potentials (i.e.,potentials that do not decay to zero monotonically) and present a model for the expected differential flux. The energy of the cutoff and the magnitude of the differential flux are related to the properties of the local space environment and are consistent with the observed flux spectra. If this interpretation is correct, these surface-based ion observations provide a unique perspective that both complements and enhances the conclusions obtained by remote-sensing orbiter observations on the Moon's exospheric and electrostatic properties. |
英文关键词 | SIDE nonmonotonic potentials plasma sheet lunar surface potential |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393954900010 |
WOS关键词 | PHOTOELECTRON SHEATH ; SOLAR-WIND ; PLASMA ; SPACE ; FIELDS ; RADIATION ; SHADOW ; RATES ; MOON ; IONS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27223 |
专题 | 气候变化 |
作者单位 | 1.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA; 2.NASA, Ames Res Ctr, DREAM2, SSERVI, Moffett Field, CA 94035 USA; 3.St Marys Coll Maryland, Dept Phys, St Marys City, MD 20686 USA; 4.Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA; 5.Adnet Syst Inc, Lanham, MD USA |
推荐引用方式 GB/T 7714 | Collier, Michael R.,Newheart, Anastasia,Poppe, Andrew R.,et al. Stair-step particle flux spectra on the lunar surface: Evidence for nonmonotonic potentials?[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(1). |
APA | Collier, Michael R.,Newheart, Anastasia,Poppe, Andrew R.,Hills, H. Kent,&Farrell, William M..(2017).Stair-step particle flux spectra on the lunar surface: Evidence for nonmonotonic potentials?.GEOPHYSICAL RESEARCH LETTERS,44(1). |
MLA | Collier, Michael R.,et al."Stair-step particle flux spectra on the lunar surface: Evidence for nonmonotonic potentials?".GEOPHYSICAL RESEARCH LETTERS 44.1(2017). |
条目包含的文件 | 条目无相关文件。 |
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