DOI: 10.1002/2013GL058268
论文题名: Spontaneous formation of nonspherical water ice grains in a plasma environment
作者: Chai K.-B. ; Bellan P.M.
刊名: Geophysical Research Letters
ISSN: 0094-8324
EISSN: 1944-8055
出版年: 2013
卷: 40, 期: 23 起始页码: 6258
结束页码: 6263
语种: 英语
英文关键词: charged aerosols
; dusty plasma
; mesospheric ice clouds
; non-spherical growth
; planetary icy rings and moons
; water-ice particle
Scopus关键词: Charged aerosols
; Dusty plasmas
; Grain number density
; Ice clouds
; Non-Spherical
; Polar mesospheric clouds
; Power-law dependences
; Spontaneous formation
; Clouds
; Dust
; Normal distribution
; Planets
; Plasma theory
; Semiconductor plasmas
; Spheres
; Ice
; aerosol
; cloud
; electric field
; ice
; mesosphere
; plasma
; Saturn
英文摘要: Saturn's rings, terrestrial polar mesospheric clouds, and astrophysical molecular clouds are all dusty plasma environments where tiny grains of water ice are an important constituent. Existing models typically assume that the ice grains are spherical and then invoke various arguments about the normal distribution or the power law dependence of grain number density on grain radius. Using a laboratory plasma in which water ice grains spontaneously form, we investigated the validity of the traditional assumption that these grains are spherical. We found that in certain cases at low ambient pressures, water ice grains in the laboratory dusty plasma are not spherical but instead are highly elongated, i.e., ellipsoidal. Preliminary analysis suggests that electrical forces associated with the dusty plasma environment are responsible for the nonspherical shape. Key Points Measurement of size/growth/shape of ice grains in water ice lab plasma Nonspherical (ellipsoidal) water ice grains observed in low pressure plasma Related to water ice dusty plasmas in polar mesospheric clouds, Saturn's rings ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84888794099&doi=10.1002%2f2013GL058268&partnerID=40&md5=5b03268071873c5008929d266818213e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5588
Appears in Collections: 气候减缓与适应
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作者单位: Department of Applied Physics and Materials Science, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, United States
Recommended Citation:
Chai K.-B.,Bellan P.M.. Spontaneous formation of nonspherical water ice grains in a plasma environment[J]. Geophysical Research Letters,2013-01-01,40(23).