@techreport{oai:jaxa.repo.nii.ac.jp:00002088,
 author = {豊田, 康裕 and 西山, 和孝 and 國中, 均 and Toyoda, Yasuhito and Nishiyama, Kazutaka and Kuninaka, Hitoshi},
 month = {Feb},
 note = {Workshop on research and development of JIEDI (JAXA Ion Engine Development Initiatives) tool for numerical evaluation of ion engine grid lifetime, The erosion of accelerator grid aperture due to impingement of charge-exchange ions limits the normal operation of the microwave discharge ion engine, in which long life and high reliability are inherent because of electrode-less plasma generations. A commercially available image scanner and image-analysis software enabled to statistically analze the diameters of the huge number of apertures in the flat C/C grids. This measurement method was applied to the accelerator grids of mu10 ion engine after the 20,000 hour endurance test and mu20 ion engine under ion machining in 30 hours. As a result, it was revealed that the erosion distribution of the mu10 grid had the azimuthal dependence. Moreover, we obtained the design guide for the next mu20 accelerator grid, to make the apertures with tapered shape on the side of upstream., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA0064642007, レポート番号: JAXA-RR-09-004},
 title = {イメージスキャナを用いた平板Ｃ／Ｃグリッド孔径の統計的分析},
 year = {2010}
}