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titleMeasurement of photoelectron emission by vacuum ultraviolet ray irradiation
Other TitleMeasurement of photoelectron emission by vacuum ultraviolet ray irradiation
Author(jpn)岡村 宗悟; 岩尾 徹; 湯本 雅恵; 三宅 弘晃; 仁田 工美
Author(eng)Okamura, Shugo; Iwao, Toru; Yumoto, Motoshige; Miyake, Hiroaki; Nitta, Kumi
Author Affiliation(jpn)武蔵工業大学; 武蔵工業大学; 武蔵工業大学; 宇宙航空研究開発機構; 宇宙航空研究開発機構
Author Affiliation(eng)Musashi Institute of Technology; Musashi Institute of Technology; Musashi Institute of Technology; Japan Aerospace Exploration Agency (JAXA); Japan Aerospace Exploration Agency (JAXA)
Issue Date2008-03-31
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication title第4回宇宙環境シンポジウム講演論文集
Proceedings of the 4th Spacecraft Environment Symposium
Start page101
End page104
Publication date2008-03-31
AbstractRecently, the satellite plays many roles depending on the purpose, including communication, weather observation, astronomy observation and space development. The satellite is requisitioned long life and high reliability in such situation. However, around an altitude of several 100 km, there is Atomic Oxygen (AO) which is a main ingredient agents. AO has high reactivity and its density is about 10(exp 15) atoms/cu m. Because the satellite collides with AO, surface materials of the satellite are deteriorated. As a result, it leads unevenness and oxidation. Accordingly, it is necessary to monitor the surface condition. In this study, photoemission characteristics of several materials, such as metals, glasses and polymers are measured by use of the deuterium lamp and the band path filters. From the measurement the threshold energy for photoemission and the quantum efficiency was evaluated. As a result, the thresholds of samples are 4.9 to 5.7 eV. The quantum efficiency of metals is about 100 times higher than other samples. The quantum efficiency of PS (PolyStyrene) which includes benzene ring is several times higher compared with PP (PolyPropylene) and PTFE (PolyTetraFluoroEthylene). From these results, it is deduced that deteriorated materials may emit large amount of photoelectron.
DescriptionJAXA Special Publication
Keywordsaerospace environment; photoelectron; vacuum ultraviolet radiation; satellite surface; oxygen atom; oxidation; quantum efficiency; deuterium lamp; 航空宇宙環境; 光電子; 真空紫外放射; 衛星表面; 酸素原子; 酸化; 量子効率; 重水素ランプ
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-07-030

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