JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
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Other TitleObservation of Surface Discharge Phenomena on Dielectric Materials
Author(jpn)渋谷, 一晃; 小宮山, 洋平; 武田, 雷蔵; 三宅, 弘晃; 田中, 康寛; 高田, 達雄
Author(eng)Shibuya, Kazuaki; Komiyama, Yohei; Takeda, Raizo; Miyake, Hiroaki; Tanaka, Yasuhiro; Takada, Tatsuo
Author Affiliation(jpn)東京都市大学; 東京都市大学; 東京都市大学; 東京都市大学; 東京都市大学; 東京都市大学
Author Affiliation(eng)Tokyo City University; Tokyo City University; Tokyo City University; Tokyo City University; Tokyo City University; Tokyo City University
Issue Date2012-02-20
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構特別資料: 第8回宇宙環境シンポジウム講演論文集
JAXA special publication: Proceedings of the 8th Spacecraft Environment Symposium
Start page181
End page185
Publication date2012-02-20
AbstractWe have developed a surface discharging measurement system, using Pockels effect. Pockels effect is a kind of electro-optic effect. The Pockels effect means that the phase shift of polarized light, which phases through the Pockels device, is proportional to applied electric field to the Pockels device. In this measurement system using Pockels effect, when the light which is produced by LED or LD propagate in the Pockels device, each of two orthogonal components travels different velocities which depend on the refractive index of each component. After the light passing through the Pockels device, a phase shift occurs in the light between the two components. This results in an elliptical polarization of the emerging beam. The degree of the phase shift and the ellipticity depend on the electric field being applied to the Pockels device. Therefore, by observing the distribution of the phase shift of the emerged light from the BSO (Pockels crystal), we can measure the electric field distribution in BSO. In our experiments, we apply an sinusoidal wave voltage to a needle electrode on the sample put on the BSO cell. When the applied voltage makes a surface discharge on the sample by the applied sinusoidal voltage, the charge remained on the sample makes the electric field distribution in the BSO cell. Therefore, by measuring the distribution of the phase shift, we can observe the surface discharge pattrn. In this experiment, the atmosphere pressure around the sample is controlled in the range from 101 kPa to 11 kPa. From those experimental results, we found the patterns on various materials are categorized into two characteristics. Furthermore, we also found that the two characteristics strongly depend on the ionization energy of the materials of the samples.
DescriptionPhysical characteristics: Original contains color illustrations
Meeting Information: 8th Spacecraft Enivironment Symposium (October 18-19, 2011, Tokyo Big Sight), Tokyo Japan
形態: カラー図版あり
会議情報: 第8回宇宙環境シンポジウム (2011年10月18-19日. 東京国際展示場), 東京
KeywordsSurface discharge; Spacecraft; Dielectric; Pockels effect; 沿面放電; 宇宙機; 絶縁材料; ポッケルス効果
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-11-012

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