Wake formation behind Langmuir probes in ionospheric plasmas

Chun Sung Jao, Sigvald Marholm, Andres Spicher, Wojciech J. Miloch

研究成果: 雜誌貢獻期刊論文同行評審

1 引文 斯高帕斯(Scopus)


This paper presents a simulation study of the wake formation behind a Langmuir probe thinner than the Debye Length in the space environments such as the ionosphere's F region. We find that the wakes formed in plasma density and electric potential behind the positively biased probe can extend up to 15 Debye lengths in the subsonic plasma flow. Higher electric bias and flow velocity can further enhance the plasma wake perturbations. With an external magnetic field parallel to the object's axis, the plasma wake becomes asymmetric and more extensive than for the unmagnetized case. The wing structures in the electron and ion densities are also observed along the background magnetic field in the case of subsonic plasma flow. The quantitative results in this paper may provide a practical reference for data processing and the future design of the Langmuir probe instrument flying in the F region on such as sounding rockets and low Earth orbit (LEO) satellite missions. In particular, since the Langmuir probe instrument may comprise two or more biased Debye-scale Langmuir probes, the plasma wake formed behind a single probe may influence the measurements from other instruments onboard.

頁(從 - 到)856-868
期刊Advances in Space Research
出版狀態已出版 - 15 1月 2022


深入研究「Wake formation behind Langmuir probes in ionospheric plasmas」主題。共同形成了獨特的指紋。