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1,634 results on '"Ishikawa J"'

160. Electron emission properties of Spindt-type platinum field emission cathodes

Author

00225666, 20127103, Gotoh, Y, Nagao, M, Nozaki, D, Utsumi, K, Inoue, K, Nakatani, T, Sakashita, T, Betsui, K, Tsuji, H, Ishikawa, J, 00225666, 20127103, Gotoh, Y, Nagao, M, Nozaki, D, Utsumi, K, Inoue, K, Nakatani, T, Sakashita, T, Betsui, K, Tsuji, H, and Ishikawa, J

Abstract

Electron emissionproperties of Spindt-type platinumfield emissioncathodes were investigated. The current–voltage characteristics together with the current fluctuation during long term operation were evaluated in ultrahigh vacuum. The changes of the emission properties in hydrogen, oxygen or carbon monoxide gas ambient were also investigated. Significant improvement of the emission properties was found when the cathode was operated in carbon monoxide ambient under a certain condition. It was found that the effect of the improvement lasted at least 200 h, and resistance against the oxygen exposure was also improved. The changes of the electron emissionproperties during long term operation in ultrahigh vacuum and in gas ambient were analyzed with the Seppen–Katamuki chart, of which ordinate and abscissa are slope and intercept of Fowler–Nordheim plot. The electron emissionproperties were distributed along a straight line in the Seppen–Katamuki chart, and those of the cathode improved by carbon monoxide exposure were distributed along another line. The deviation of the electron emissionproperty in ultrahigh vacuum was considered to be due to change in the geometry of the emitting surface. The major reason for the modification of electron emissionproperties in carbon monoxide ambient was considered to be deposition of carbon onto the emitting surface, resulting in reduction of the work function. From the deviation of the Fowler–Nordheim characteristics in the Seppen–Katamuki chart, we presented an empirical equation for field emission.

Published
2004

183. Fibrous structures on diamond and carbon surfaces formed by hydrogen plasma under direct current bias and field electron-emission properties

Author

00225666, 20127103, Kobashi, K, Tachibana, T, Yokota, Y, Kawakami, N, Hayashi, K, Yamamoto, K, Koga, Y, Fujiwara, S, Gotoh, Y, Nakahara, H, Tsuji, H, Ishikawa, J, Kock, FA, Nemanich, RJ, 00225666, 20127103, Kobashi, K, Tachibana, T, Yokota, Y, Kawakami, N, Hayashi, K, Yamamoto, K, Koga, Y, Fujiwara, S, Gotoh, Y, Nakahara, H, Tsuji, H, Ishikawa, J, Kock, FA, and Nemanich, RJ

Published
2003

192. R&D of diamond films in the Frontier Carbon Technology Project and related topics

Author

00225666, 20127103, Kobashi, K, Nishibayashi, Y, Yokota, Y, Ando, Y, Tachibana, T, Kawakami, N, Hayashi, K, Inoue, K, Meguro, K, Imai, H, Furata, H, Hirao, T, Oura, K, Gotoh, Y, Nakahara, H, Tsuji, H, Ishikawa, J, Koeck, FA, Nernanich, RJ, Sakai, T, Sakuma, N, Yoshida, H, 00225666, 20127103, Kobashi, K, Nishibayashi, Y, Yokota, Y, Ando, Y, Tachibana, T, Kawakami, N, Hayashi, K, Inoue, K, Meguro, K, Imai, H, Furata, H, Hirao, T, Oura, K, Gotoh, Y, Nakahara, H, Tsuji, H, Ishikawa, J, Koeck, FA, Nernanich, RJ, Sakai, T, Sakuma, N, and Yoshida, H

Published
2003

194. Genome Sequence of Kitasatospora setae NBRC 14216T: An Evolutionary Snapshot of the Family Streptomycetaceae

Author

Ichikawa, N., primary, Oguchi, A., additional, Ikeda, H., additional, Ishikawa, J., additional, Kitani, S., additional, Watanabe, Y., additional, Nakamura, S., additional, Katano, Y., additional, Kishi, E., additional, Sasagawa, M., additional, Ankai, A., additional, Fukui, S., additional, Hashimoto, Y., additional, Kamata, S., additional, Otoguro, M., additional, Tanikawa, S., additional, Nihira, T., additional, Horinouchi, S., additional, Ohnishi, Y., additional, Hayakawa, M., additional, Kuzuyama, T., additional, Arisawa, A., additional, Nomoto, F., additional, Miura, H., additional, Takahashi, Y., additional, and Fujita, N., additional

Published
2010
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