Formation of Plasma Around a Small Meteoroid: Electrostatic Simulations
Formation of Plasma Around a Small Meteoroid: Electrostatic Simulations
复制标题
小流星体周围等离子体的形成:静电模拟
DOI:
10.1029/2018ja026434
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Close, S.
中科院分区:
文献类型:
--
作者:
Sugar, G.;Oppenheim, M. M.;Dimant, Y. S.;Close, S.
Obtaining meteoroid mass from head echo radar cross section depends on the assumed plasma density distribution around the meteoroid. An analytical model presented in Dimant and Oppenheim (2017a, https://doi.org/10.1002/2017JA023960; 2017b, https://doi.org/10.1002/2017JA023963) and simulation results presented in Sugar et al. (2018, https://doi.org/10.1002/2018JA025265) suggest the plasma density distribution is significantly different than the spherically symmetric Gaussian distribution used to calculate meteoroid masses in many previous studies. However, these analytical and simulation results ignored the effects of electric and magnetic fields and assumed quasi‐neutrality. This paper presents results from the first particle‐in‐cell simulations of head echo plasma that include electric and magnetic fields. The simulations show that the fields change the ion density distribution by less than ∼2% in the meteor head echo region, but the electron density distribution changes by up to tens of percent depending on the location, electron energies, and magnetic field orientation with respect to the meteoroid path.
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DOI:
10.1002/2017ja023960
发表时间:
2016-08
期刊:
Journal of Geophysical Research: Space Physics
影响因子:
--
作者:
Y. Dimant;M. Oppenheim
通讯作者:
Y. Dimant;M. Oppenheim
影响因子:
6.3
作者:
J. Chau;R. Woodman
通讯作者:
R. Woodman
影响因子:
2.4
作者:
R. Marshall;P. Brown;S. Close
通讯作者:
S. Close
影响因子:
1.9
作者:
M. Oppenheim;Y. Dimant;L. Dyrud
通讯作者:
L. Dyrud
DOI:
10.1016/j.jastp.2008.06.016
发表时间:
2008
影响因子:
1.9
作者:
L. Dyrud;D. Janches
通讯作者:
D. Janches