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Electron Temperatures and Electron Densities in Microwave Helium Discharges with Pressures Higher than 0.1 MPa
Title: | Electron Temperatures and Electron Densities in Microwave Helium Discharges with Pressures Higher than 0.1 MPa |
Authors: | Sasaki, K. Browse this author →KAKEN DB | Soma, S. Browse this author | Akashi, H. Browse this author | ElSabbagh, M. Browse this author | Ikeda, Y. Browse this author |
Keywords: | Electron temperature | electron density | multi-atmospheric-pressure plasma | Thomson scattering | plasma-assisted combustion |
Issue Date: | Sep-2015 |
Publisher: | Wiley-Blackwell |
Journal Title: | Contributions to plasma physics |
Volume: | 55 |
Issue: | 8 |
Start Page: | 563 |
End Page: | 569 |
Publisher DOI: | 10.1002/ctpp.201500033 |
Abstract: | We adopted laser Thomson scattering for measuring the electron density and the electron temperature of microwave plasmas produced in helium at the pressures higher than the atmospheric pressure. The electron density decreased while we observed the increase in the electron temperature with the pressure. These are reasonable results by considering the decrease in the reduced electric field, the dominant loss of electrons via three-body recombination with helium as the third body, and the production of electrons with medium energy via heavy particle collisions at the high gas pressure. The temporal variation of the electron temperature had the rise and the fall time constants of approximately 10 ns. The rapid heating and cooling of the electron temperature are due to the fast energy transfer from electrons to helium because of the high collision frequency in the high-pressure discharge. |
Rights: | This is the peer reviewed version of the following article: Contributions to Plasma Physics 55(8) 563-569, which has been published in final form at http://doi.org/10.1002/ctpp.201500033. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/62724 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 佐々木 浩一
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