Search Results - "Sasao, M."

Latest experimental and theoretical advances in the production of negative ions in caesium-free plasmas by Taccogna, F., Bechu, S., Aanesland, A., Agostinetti, P., Agnello, R., Aleiferis, S., Angot, T., Antoni, V., Bacal, M., Barbisan, M., Bentounes, J., Bès, A., Capitelli, M., Cartry, G., Cavenago, M., Celiberto, R., Chitarin, G., Delogu, R., De Lorenzi, A., Esposito, F., Fadone, M., Ferron, N., Fubiani, G., Furno, I., Gavilan, L., Guittienne, P., Howling, A., Jacquier, R., Laricchiuta, A., Layet, J. M., Lemaire, J. L., Longo, S., Maurice, B., Minelli, P., Minissale, M., Mitrou, M., Moussaoui, R., Pimazzoni, A., Poggi, C., Rafalskyi, D., Salomon, E., Sartori, E., Sasao, M., Serianni, G., Spada, E., Suweis, S., Svarnas, P., Tahri, L., Ugoletti, M., Variale, V., Veltri, P.

“…This topical review gathers the last updates concerning caesium-free negative ion sources presented during the 63 rd Course of the International school of…”
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Angle-resolved intensity and energy distributions of positive and negative hydrogen ions released from tungsten surface by molecular hydrogen ion impact by Kato, S., Tanaka, N., Sasao, M., Kisaki, M., Tsumori, K., Nishiura, M., Matsumoto, Y., Kenmotsu, T., Wada, M., Yamaoka, H.

“…Hydrogen ion reflection properties have been investigated following the injection of H+, H2+ and H3+ ions onto a polycrystalline W surface. Angle- and…”
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Angular distributions of surface produced H(-) ions for reflection and desorption processes by Wada, M, Kasuya, T, Kenmotsu, T, Sasao, M

“…A numerical simulation code, Atomic Collision in Amorphous Target, has been run to clarify the effects due to the incident angle of hydrogen flux onto surface…”
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Distribution of footprint marked by energetic alpha particle bombardment on the first wall by Okamoto, A., Isobe, M., Kitajima, S., Sasao, M.

“…Full orbit-following calculations for the final orbit of lost alpha particles in an ITER equilibrium are performed using a Lorentz orbit code LORBIT [M. Isobe,…”
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Reflection properties of hydrogen ions at helium irradiated tungsten surfaces by Doi, K, Tawada, Y, Lee, H T, Kato, S, Tanaka, N, Sasao, M, Kisaki, M, Nishiura, M, Matsumoto, Y, Kenmotsu, T, Wada, M, Ueda, Y, Yamaoka, H

“…Nanostructured W surfaces prepared by He bombardment exhibit characteristic angular distributions of hydrogen ion reflection upon injection of 1 keV H+ beam. A…”
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Effects of roughness and temperature on low-energy hydrogen positive and negative ion reflection from silicon and carbon surfaces by Tanaka, N, Kato, S, Miyamoto, T, Nishiura, M, Tsumori, K, Matsumoto, Y, Kenmotsu, T, Okamoto, A, Kitajima, S, Sasao, M, Wada, M, Yamaoka, H

“…Angle-resolved energy distribution functions of positive and negative hydrogen ions produced from a rough-finished Si surface under 1 keV proton irradiation…”
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Effect of ion beam and neutron irradiations on the luminescence of polycrystalline Ce-doped Y3Al5O12 ceramics by HIROUCHI, T, NISHIURA, M, ISOBE, M, MUTOH, T, NAGASAKA, T, IDO, T, FUNAKI, D, KOBUCHI, T, OKAMOTO, A, KITAJIMA, S, SASAO, M, FUJIOKA, K

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Low-energy particle interaction at carbon nanowalls on W surface by Tanaka, N., Yamaoka, H., Nishiura, M., Tsumori, K., Nagamura, T., Sasao, M., Kenmotsu, T., Matsumoto, Y., Wada, M.

“…We measured the characteristics of the reflected particles from a carbon nanowall (CNW) deposited on a W surface following the injection of 1–2 keV H + and O +…”
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Observation of the "self-healing" of an error field island in the large helical device by Narihara, K, Watanabe, K Y, Yamada, I, Morisaki, T, Tanaka, K, Sakakibara, S, Ida, K, Sakamoto, R, Ohyabu, N, Ashikawa, N, Emoto, M, Funaba, H, Goto, M, Hayashi, H, Idei, H, Ikeda, K, Inagaki, S, Inoue, N, Kaneko, O, Kawahata, K, Kobuchi, T, Komori, A, Kubo, S, Kumazawa, R, Masuzaki, S, Miyazawa, J, Morita, S, Motojima, O, Murakami, S, Muto, S, Mutoh, T, Nagayama, Y, Nakamura, Y, Nakanishi, H, Nishimura, K, Noda, N, Notake, T, Ohdachi, S, Oka, Y, Ohkubo, K, Osakabe, M, Ozaki, S, Peterson, B J, Sagara, A, Saito, K, Sasao, H, Sasao, M, Sato, K, Sato, M, Seki, T, Shimozuma, T, Shoji, C, Sudo, S, Suzuki, H, Takayama, A, Takechi, M, Takeiri, Y, Tamura, N, Toi, K, Tokuzawa, N, Torii, Y, Tsumori, K, Watari, T, Yamada, H, Yamaguchi, S, Yamamoto, S, Yamazaki, K, Yoshimura, Y

“…It was observed that the vacuum magnetic island produced by an external error magnetic field in the large helical device shrank in the presence of plasma. This…”
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Particle reflections of low energy light ions from a vanadium alloy (V–4Cr–4Ti) by Yamaoka, H., Tanaka, N., Matsumoto, Y., Nishiura, M., Tsumori, K., Takeuchi, S., Sugawara, H., Shinto, K., Okamoto, A., Sasao, M., Wada, M.

“…The angular distributions and energy spectra of positive and negative ions reflected from a vanadium alloy (V–4Cr–4Ti) bombarded by beams of low energy…”
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Dependence of H − extraction probability on filter magnetic field and gas pressure of a volume-type negative ion source by Matsumoto, Y., Nishiura, M., Matsuoka, K., Sasao, M., Wada, M., Yamaoka, H.

“…The dependence of H − extraction probability on filter magnetic field strength and gas pressure is studied in a small volume-type negative ion source. Spatial…”
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Angular resolved energy distributions of low energy light ions reflected from a polycrystalline Mo surface by Yamaoka, H., Matsumoto, Y., Nishiura, M., Nishimura, K., Sasao, M., Wada, M.

“…We have developed an experimental system to study systematically the interaction of low energy beams with materials. The angular distributions and energy…”
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Edge thermal transport barrier In LHD discharges by Ohyabu, N, Narihara, K, Funaba, H, Morisaki, T, Masuzaki, S, Kawahata, K, Komori, A, Kaneko, O, Yamada, H, deVries, P, Emoto, M, Goto, M, Hamada, Y, Ida, K, Idei, H, Inagaki, S, Inoue, N, Kado, S, Kubo, S, Kumazawa, R, Minami, T, Miyazawa, J, Morita, S, Murakami, S, Mutoh, T, Muto, S

“…In LHD discharges a significant enhancement of the global energy confinement has been achieved for the first time in a helical device with an edge thermal…”
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Ion heating and high-energy-particle production by ion-cyclotron heating in the large helical device by Mutoh, T, Kumazawa, R, Seki, T, Watari, T, Saito, K, Torii, Y, Hartmann, DA, Zhao, Y, Sasao, M, Isobe, M, Osakabe, M, Krasilnikov, AV, Ozaki, T, Narihara, K, Nagayama, Y, Inagaki, S, Shimpo, F, Nomura, G, Yokota, M, Akaishi, K, Ashikawa, N, de Vries P, Emoto, M, Funaba, H, Fukuyama, A, Goto, M

“…Ion-cyclotron heating was applied to the Large Helical Device. When the proton-cyclotron resonance was near the saddle point of the magnetic field-strength…”
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Island dynamics in the large-helical-device plasmas by Ohyabu, N, Ida, K, Morisaki, T, Narihara, K, Komori, A, Watanabe, K, Narushima, Y, Nagayama, Y, Shoji, M, Ashikawa, N, Emoto, M, Funaba, H, Goto, M, Idei, H, Ikeda, K, Inagaki, S, Inoue, N, Isobe, M, Khlopenkov, K, Kobuchi, T, Kostrioukov, A, Kubo, S, Kumazawa, R, Liang, Y, Masuzaki, S, Minami, T, Miyazawa, J, Morita, S, Muto, S, Mutoh, T, Murakami, S, Nakamura, Y, Nakanishi, H, Nishimura, K, Noda, N, Notake, T, Ohkubo, K, Ohdachi, S, Oka, Y, Osakabe, M, Ozaki, T, Peterson, B J, Sakamoto, R, Sakakibara, S, Sagara, A, Saito, K, Sasao, M, Sato, K, Sato, M, Seki, T, Shimozuma, T, Sudo, S, Suzuki, H, Takeiri, Y, Tanaka, K, Tamura, N, Toi, K, Tokuzawa, T, Torii, Y, Tsumori, K, Watanabe, T, Yamazaki, K, Yamada, I, Yamamoto, S, Yokoyama, M, Yoshimura, Y, Watari, T, Xu, Y, Kaneko, O, Kawahata, K, Yamada, H, Motojima, O

“…In the Large Helical Device plasma discharges, the size of an externally imposed island with mode number ( n/m = 1/1) decreases substantially when the plasma…”
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Sawtooth oscillation in current-carrying plasma in the large helical device by Nagayama, Y, Kawahata, K, Inagaki, S, Peterson, B J, Sakakibara, S, Tanaka, K, Tokuzawa, T, Watanabe, K Y, Ashikawa, N, Chikaraishi, H, Emoto, M, Funaba, H, Goto, M, Hamada, Y, Ichiguchi, K, Ida, K, Idei, H, Ido, T, Ikeda, K, Imagawa, S, Isayama, A, Isobe, M, Iwamoto, A, Kaneko, O, Kitagawa, S, Komori, A, Kubo, S, Kumazawa, R, Masuzaki, S, Matsuoka, K, Mito, T, Miyazawa, J, Morisaki, T, Morita, S, Motojima, O, Murakami, S, Mutoh, T, Muto, S, Nakajima, N, Nakamura, Y, Nakanishi, H, Narihara, K, Narushima, Y, Nishimura, A, Nishimura, K, Nishizawa, A, Noda, N, Ohdachi, S, Ohkubo, K, Ohyabu, N, Oka, Y, Osakabe, M, Ozaki, T, Sagara, A, Saito, K, Sakamoto, R, Sasao, M, Sato, K, Seki, T, Shimozuma, T, Shoji, M, Suzuki, H, Sudo, S, Takahata, K, Takeiri, Y, Toi, K, Tsumori, K, Yamada, H, Yamada, I, Yamazaki, K, Yanagi, N, Yokoyama, M, Yoshimura, Y, Yoshinuma, Y, Watari, T

“…Sawtooth oscillations have been observed in current-carrying helical plasmas by using electron-cyclotron-emission diagnostics in the Large Helical Device. The…”
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Ion sources for fusion plasma diagnostics by Sasao, M., Connor, K.A., Ida, K., Iguchi, H., Ivanov, A.A., Nishiura, M., Thomas, D.M., Wada, M., Yoshinuma, M.

“…Various probing beams have been developed and used for plasma diagnostics in thermonuclear fusion research for magnetic confinement. The required beam current,…”
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Neutralization loss of high energy particles in the plasma boundary of LHD by Sasao, M., Isobe, M., Seki, T., Saito, K., Saida, T., Murakami, S., Krasilnikov, A.V.

“…The neutralization loss of high-energy particles is studied by investigating the density dependence of the energetic neutral flux from large helical device…”
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Energetic-Ion-Driven Toroidal Alfvén Eigenmodes Observed in a Heliotron/Torsatron Plasma by Takechi, M., Toi, K., Takagi, S., Matsunaga, G., Ohkuni, K., Ohdachi, S., Akiyama, R., Darrow, D. S., Fujisawa, A., Gotoh, M., Idei, H., Iguchi, H., Isobe, M., Kondo, T., Kojima, M., Kubo, S., Lee, S., Minami, T., Morita, S., Matsuoka, K., Nishimura, S., Okamura, S., Osakabe, M., Sasao, M., Shimizu, M., Takahashi, C., Tanaka, K., Yoshimura, Y.

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Focusing of He + beams using a compact electrostatic quadrupole lens system by Guharay, S.K., Nishiura, M., Sasao, M., Hamabe, M., Wada, M., Kuroda, T.

“…A compact electrostatic quadrupole lens system has been developed, and experiments have been conducted to study transport and focusing of intense He + beams…”
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