JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
49045000.pdf3.85 MB
Other TitleSpatial charge cloud distribution of microchannel plates: Measurements and modeling
Author(jpn)齋藤 実穂; 齋藤 義文; 向井 利典; 浅村 和史
Author(eng)Saito, Miho; Saito, Yoshifumi; Mukai, Toshifumi; Asamura, Kazushi
Author Affiliation(jpn)宇宙航空研究開発機構 宇宙科学研究本部; 宇宙航空研究開発機構 宇宙科学研究本部; 宇宙航空研究開発機構 宇宙科学研究本部; 宇宙航空研究開発機構 宇宙科学研究本部
Author Affiliation(eng)Japan Aerospace Exploration Agency Institute of Space and Astronautical Science; Japan Aerospace Exploration Agency Institute of Space and Astronautical Science; Japan Aerospace Exploration Agency Institute of Space and Astronautical Science; Japan Aerospace Exploration Agency Institute of Space and Astronautical Science
Issue Date2005-11-30
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication date2005-11-30
AbstractSpatial distributions of the charge cloud on the anode are examined both experimentally and theoretically. The initial electron cloud at the MCP output has angular divergence and energies, therefore the size of the charge cloud on the anode becomes broader than the original size at the MCP output. Furthermore, space charge effects may broaden the size of the charge cloud. The size of the charge cloud has been examined with various conditions of the acceleration voltage between the MCP output and the anode (anode voltage) and the MCP voltage to control the gain and hence the amount of output electrons from the MCP. The experimental results are well explained in terms of these effects in comparison with the model calculation of the spreading electron cloud in which a Gaussian distribution is assumed for the spatial distribution so that its standard deviation is taken as a charge cloud radius. The radius was measured to be 0.4 mm to 1 mm under the condition that the gap between the MCP output and the anode is 2.5 mm with accelerated anode voltage of 70 to 300 V. The radius is approximately inverse proportional to the square root of the anode voltage. The radius has also a dependence of MCP output charge. Smaller MCP output charge exhibits smaller charge cloud radius. Spatial distribution of charge cloud are calculated from the model in which pulsed current broad along the way to an anode with space charge effects. The model results are compared with the experimental results of Edgar and show good agreements.
DescriptionJAXA Research and Development Report
Keywordsmicrochannel plate; charge cloud; charge density distribution; cloud size; pulse amplitude; Maxwell equation; equation of motion; parameter dependency; anode voltage; histogram; space charge; マイクロチャネルプレート; チャージクラウド; 電荷密度分布; クラウドサイズ; 波高; マクスウェル方程式; 運動方程式; パラメータ依存性; アノード電圧; ヒストグラム; 空間電荷
Document TypeTechnical Report
JAXA Category研究開発報告
Report NoJAXA-RR-05-010

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