2024-03-28T12:48:16Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:02001578
2023-01-16T05:16:23Z
879:880:881
Atomic Oxygen Ion‐Neutral Collision Frequency Models at Ionospheric Temperatures
Ieda, A.
open access
© 2021 American Geophysical Union
The collision between atomic oxygen and its first positive ion plays a major role in Earth's F region ionosphere. An accurate corresponding collision frequency model is necessary to quantitatively understand the ionosphere. However, the widely used classic Banks theoretical model typically provides a collision frequency that is 30% lower than the expectation from ionospheric observations. Accordingly, the classic collision frequency is often adjusted by multiplying it by a constant known as the Burnside factor. This correction-factor model adopted the classic model as its basis due to a misunderstanding that the classic model was based on a laboratory experiment; that is, the correction factor was originally meant to compensate for laboratory contamination. In this study, a collision frequency model is constructed based on the laboratory experiment, and the resultant laboratory-based model is found to be consistent with ionospheric observations. In this construction, the impact of laboratory contamination is determined to be small (7%) and is mostly canceled by a misinterpretation regarding the conventional definitions of energy. Thus, the 30% difference is mainly caused by a theoretical error in the classic model itself. This error is energy-dependent and corrected by the later wide-energy theoretical model. Thus, the classic model cannot be corrected by a temperature-independent constant and should be replaced by the later model.
Wiley
2021-11-10
2021-01
eng
journal article
VoR
http://hdl.handle.net/2237/0002001578
https://nagoya.repo.nii.ac.jp/records/2001578
https://doi.org/10.1029/2020JA028441
2169-9380
Journal of Geophysical Research: Space Physics
126
1
e2020JA028441
https://nagoya.repo.nii.ac.jp/record/2001578/files/2020JA028441.pdf
application/pdf
727 KB
2021-11-10