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20 results on '"Kashiwagi, M."'

1. Completion of JT-60SA construction and contribution to ITER

Author

Kamada Y., Di Pietro E., Hanada M., Barabaschi P., Ide S., Davis S., Yoshida M., Giruzzi G., Sozzi C., Abdel Maksoud W., Abe H., Aiba N., Akiyama T., Ayllon-Guerola J., Arai T., Artaud J. -F., Asakura N., Ashikawa N., Balbinot L., Bando T., Baulaigue O., Belonohy E., Bin W., Bombarda F., Bolzonella T., Bonne F., Bonotto M., Botija J., Cabrera-Perez S., Cardella A., Carraro L., Cavalier J., Chernyshova M., Chiba S., Clement-Lorenzo S., Cocilovo V., Coda S., Coelho R., Coffey I., Collin B., Corato V., Cucchiaro A., Czarski T., Dairaku M., Day C., de la Luna E., De Tommasi G., Decool P., Di Pace L., Dibon M., Disset G., Ejiri A., Endo Y., Ezumi N., Falchetto G., Fassina A., Fejoz P., Ferro A., Fietz W., Figini L., Fornal T., Frello G., Fujita T., Fukuda T., Fukui K., Fukumoto M., Furukawa M., Futatani S., Gabellieri L., Gaio E., Galazka K., Garcia J., Garcia-Dominguez J., Garcia-Lopez J., Garcia-Munoz M., Garzotti L., Gasparini F., Gharafi S., Giacomelli L., Ginoulhiac G., Giudicotti L., Guillen Gonzalez R., Hajnal N., Hall S., Hamada K., Hanada K., Hasegawa K., Hatae T., Hatakeyama S., Hauer V., Hayashi N., Hayashi T., Heller R., Higashijima S., Hinata J., Hiranai S., Hiratsuka J., Hiwatari R., Hoa C., Homma H., Honda A., Honda M., Horiike H., Hoshino K., Hurzlmeier H., Iafrati M., Ibano K., Ichige H., Ichikawa M., Ichimura M., Ida K., Idei H., Iijima T., Iio S., Ikeda R., Ikeda Y., Imai T., Imazawa R., Inagaki S., Inomoto M., Inoue S., Isayama A., Ishida S., Ishii Y., Isobe M., Janky F., Joffrin E., Jokinen A., Kado S., Kajita S., Kajiwara K., Kamata I., Kaminaga A., Kamiya K., Kanapienyte D., Kashiwa Y., Kashiwagi M., Katayama K., Kawamata Y., Kawamura G., Kawano K., Kawashima H., Kin F., Kitajima S., Kiyono K., Kizu K., Kobayashi K., Kobayashi M., Kobayashi S., Kobayashi T., Kocsis G., Koide Yo., Koide Yu., Kojima A., Kokusen S., Komuro K., Konishi S., Kovacsik A., Ksiazek I., Kubkowska M., Kuhner G., Kuramochi M., Kurihara K., Kurki-Suonio T., Kurniawan A. B., Kuwata T., Lacroix B., Lamaison V., Lampasi A., Lang P., Lauber P., Lawson K., Louzguiti A., Maekawa R., Maekawa T., Maeyama S., Maffia G., Maget P., Mailloux J., Maione I., Maistrello A., Malinowski K., Marchiori G., Marechal J. -L., Massaut V., Masuzaki S., Matsunaga G., Matsunaga S., Mayri Ch., Mattei M., Medrano M., Mele A., Meyer I., Michel F., Minami T., Miyata Y., Miyazawa J., Miyo Y., Mizuuchi T., Mogaki K., Morales J., Moreau P., Mori M., Morisaki T., Morishima S., Moriyama S., Moro A., Murakami H., Murayama M., Murakami S., Nagasaki K., Naito O., Nakamura S., Nakano T., Nakashima Y., Nardino V., Narita E., Narushima Y., Natsume K., Nemoto S., Neu R., Nicollet S., Nishikawa M., Nishimura S., Nishiura M., Nishiyama T., Nocente M., Nobuta Y., Novello L., Nunio F., Ochoa S., Ogawa T., Ogawa Y., Ohdachi S., Ohmori Y., Ohno N., Ohtani Y., Ohzeki M., Oishi T., Okano F., Okano J., Okano K., Onishi Y., Osakabe M., Oshima T., Ostuni V., Oya M., Oya Y., Oyama N., Ozeki T., Pasqualotto R., Pelli S., Peretti E., Phillips G., Piccinni C., Pigatto L., Pironti A., Pizzuto A., Plockl B., Polli G., Poncet J. -M., Ponsot P., Puiatti M., Radloff D., Raimondi V., Ramos F., Rancsik P., Ricci D., Ricciarini S., Rincon E., Romano A., Rossi P., Roussel P., Rubino G., Saeki H., Sagara A., Sakakibara S., Sakamoto H., Sakamoto M., Sakamoto Y., Sakasai A., Sakata S., Sakuma T., Sakurai S., Salanon B., Salmi A., Sannazzaro G., Sano R., Sanpei A., Sasajima T., Sasaki S., Sasao H., Sato F., Sato M., Sawahata M., Scherber A., Scully S., Seki M., Seki S., Shibama Y., Shibata Y., Shikama T., Shimada K., Shimono M., Shinde J., Shinya T., Shinohara K., Shirai H., Shiraishi J., Soare S., Soleto A., Someya Y., Streciwilk-Kowalska E., Strobel H., Sueoka M., Sukegawa A., Sulistyanintyas D., Sumida S., Sunaoshi H., Suzuki H., Suzuki M., Suzuki S., Suzuki T., Suzuki Y., Svoboda J., Szabolics T., Szepesi T., Takahashi K., Takase Y., Takechi M., Takeda K., Takeiri Y., Takenaga H., Taliercio C., Tamura N., Tanaka H., Tanaka K., Tani K., Tanigawa H., Tardocchi M., Terakado A., Terakado M., Terakado T., Teuchner B., Tilia B., Tobita K., Toi K., Toida N., Tojo H., Tokitani M., Tokuzawa T., Tormarchio V., Tomine M., Torre A., Totsuka T., Tsuchiya K., Tsujii N., Tsuru D., Tsutsui H., Uchida M., Ueda Y., Uno J., Urano H., Usui K., Utoh H., Valisa M., Vallar M., Vallcorba-Carbonell R., Vallet J. -C., Varela J., Vega J., Verrecchia M., Vieillard L., Villone F., Vincenzi P., Wada K., Wada R., Wakatsuki T., Wanner M., Watanabe F., Watanabe K., Wauters T., Wiesen S., Wischmeier M., Yagi M., Yagyu J., Yajima M., Yokooka S., Yokoyama M., Yamamoto S., Yamanaka H., Yamauchi K., Yamauchi Y., Yamazaki H., Yamazaki K., Yamazaki R., Yamoto S., Yanagi S., Yanagihara K., Yoshizawa N., Zani L., Zito P., Kamada, Y., Di Pietro, E., Hanada, M., Barabaschi, P., Ide, S., Davis, S., Yoshida, M., Giruzzi, G., Sozzi, C., Abdel Maksoud, W., Abe, H., Aiba, N., Akiyama, T., Ayllon-Guerola, J., Arai, T., Artaud, J. -F., Asakura, N., Ashikawa, N., Balbinot, L., Bando, T., Baulaigue, O., Belonohy, E., Bin, W., Bombarda, F., Bolzonella, T., Bonne, F., Bonotto, M., Botija, J., Cabrera-Perez, S., Cardella, A., Carraro, L., Cavalier, J., Chernyshova, M., Chiba, S., Clement-Lorenzo, S., Cocilovo, V., Coda, S., Coelho, R., Coffey, I., Collin, B., Corato, V., Cucchiaro, A., Czarski, T., Dairaku, M., Day, C., de la Luna, E., De Tommasi, G., Decool, P., Di Pace, L., Dibon, M., Disset, G., Ejiri, A., Endo, Y., Ezumi, N., Falchetto, G., Fassina, A., Fejoz, P., Ferro, A., Fietz, W., Figini, L., Fornal, T., Frello, G., Fujita, T., Fukuda, T., Fukui, K., Fukumoto, M., Furukawa, M., Futatani, S., Gabellieri, L., Gaio, E., Galazka, K., Garcia, J., Garcia-Dominguez, J., Garcia-Lopez, J., Garcia-Munoz, M., Garzotti, L., Gasparini, F., Gharafi, S., Giacomelli, L., Ginoulhiac, G., Giudicotti, L., Guillen Gonzalez, R., Hajnal, N., Hall, S., Hamada, K., Hanada, K., Hasegawa, K., Hatae, T., Hatakeyama, S., Hauer, V., Hayashi, N., Hayashi, T., Heller, R., Higashijima, S., Hinata, J., Hiranai, S., Hiratsuka, J., Hiwatari, R., Hoa, C., Homma, H., Honda, A., Honda, M., Horiike, H., Hoshino, K., Hurzlmeier, H., Iafrati, M., Ibano, K., Ichige, H., Ichikawa, M., Ichimura, M., Ida, K., Idei, H., Iijima, T., Iio, S., Ikeda, R., Ikeda, Y., Imai, T., Imazawa, R., Inagaki, S., Inomoto, M., Inoue, S., Isayama, A., Ishida, S., Ishii, Y., Isobe, M., Janky, F., Joffrin, E., Jokinen, A., Kado, S., Kajita, S., Kajiwara, K., Kamata, I., Kaminaga, A., Kamiya, K., Kanapienyte, D., Kashiwa, Y., Kashiwagi, M., Katayama, K., Kawamata, Y., Kawamura, G., Kawano, K., Kawashima, H., Kin, F., Kitajima, S., Kiyono, K., Kizu, K., Kobayashi, K., Kobayashi, M., Kobayashi, S., Kobayashi, T., Kocsis, G., Koide, Yo., Koide, Yu., Kojima, A., Kokusen, S., Komuro, K., Konishi, S., Kovacsik, A., Ksiazek, I., Kubkowska, M., Kuhner, G., Kuramochi, M., Kurihara, K., Kurki-Suonio, T., Kurniawan, A. B., Kuwata, T., Lacroix, B., Lamaison, V., Lampasi, A., Lang, P., Lauber, P., Lawson, K., Louzguiti, A., Maekawa, R., Maekawa, T., Maeyama, S., Maffia, G., Maget, P., Mailloux, J., Maione, I., Maistrello, A., Malinowski, K., Marchiori, G., Marechal, J. -L., Massaut, V., Masuzaki, S., Matsunaga, G., Matsunaga, S., Mayri, Ch., Mattei, M., Medrano, M., Mele, A., Meyer, I., Michel, F., Minami, T., Miyata, Y., Miyazawa, J., Miyo, Y., Mizuuchi, T., Mogaki, K., Morales, J., Moreau, P., Mori, M., Morisaki, T., Morishima, S., Moriyama, S., Moro, A., Murakami, H., Murayama, M., Murakami, S., Nagasaki, K., Naito, O., Nakamura, S., Nakano, T., Nakashima, Y., Nardino, V., Narita, E., Narushima, Y., Natsume, K., Nemoto, S., Neu, R., Nicollet, S., Nishikawa, M., Nishimura, S., Nishiura, M., Nishiyama, T., Nocente, M., Nobuta, Y., Novello, L., Nunio, F., Ochoa, S., Ogawa, T., Ogawa, Y., Ohdachi, S., Ohmori, Y., Ohno, N., Ohtani, Y., Ohzeki, M., Oishi, T., Okano, F., Okano, J., Okano, K., Onishi, Y., Osakabe, M., Oshima, T., Ostuni, V., Oya, M., Oya, Y., Oyama, N., Ozeki, T., Pasqualotto, R., Pelli, S., Peretti, E., Phillips, G., Piccinni, C., Pigatto, L., Pironti, A., Pizzuto, A., Plockl, B., Polli, G., Poncet, J. -M., Ponsot, P., Puiatti, M., Radloff, D., Raimondi, V., Ramos, F., Rancsik, P., Ricci, D., Ricciarini, S., Rincon, E., Romano, A., Rossi, P., Roussel, P., Rubino, G., Saeki, H., Sagara, A., Sakakibara, S., Sakamoto, H., Sakamoto, M., Sakamoto, Y., Sakasai, A., Sakata, S., Sakuma, T., Sakurai, S., Salanon, B., Salmi, A., Sannazzaro, G., Sano, R., Sanpei, A., Sasajima, T., Sasaki, S., Sasao, H., Sato, F., Sato, M., Sawahata, M., Scherber, A., Scully, S., Seki, M., Seki, S., Shibama, Y., Shibata, Y., Shikama, T., Shimada, K., Shimono, M., Shinde, J., Shinya, T., Shinohara, K., Shirai, H., Shiraishi, J., Soare, S., Soleto, A., Someya, Y., Streciwilk-Kowalska, E., Strobel, H., Sueoka, M., Sukegawa, A., Sulistyanintyas, D., Sumida, S., Sunaoshi, H., Suzuki, H., Suzuki, M., Suzuki, S., Suzuki, T., Suzuki, Y., Svoboda, J., Szabolics, T., Szepesi, T., Takahashi, K., Takase, Y., Takechi, M., Takeda, K., Takeiri, Y., Takenaga, H., Taliercio, C., Tamura, N., Tanaka, H., Tanaka, K., Tani, K., Tanigawa, H., Tardocchi, M., Terakado, A., Terakado, M., Terakado, T., Teuchner, B., Tilia, B., Tobita, K., Toi, K., Toida, N., Tojo, H., Tokitani, M., Tokuzawa, T., Tormarchio, V., Tomine, M., Torre, A., Totsuka, T., Tsuchiya, K., Tsujii, N., Tsuru, D., Tsutsui, H., Uchida, M., Ueda, Y., Uno, J., Urano, H., Usui, K., Utoh, H., Valisa, M., Vallar, M., Vallcorba-Carbonell, R., Vallet, J. -C., Varela, J., Vega, J., Verrecchia, M., Vieillard, L., Villone, F., Vincenzi, P., Wada, K., Wada, R., Wakatsuki, T., Wanner, M., Watanabe, F., Watanabe, K., Wauters, T., Wiesen, S., Wischmeier, M., Yagi, M., Yagyu, J., Yajima, M., Yokooka, S., Yokoyama, M., Yamamoto, S., Yamanaka, H., Yamauchi, K., Yamauchi, Y., Yamazaki, H., Yamazaki, K., Yamazaki, R., Yamoto, S., Yanagi, S., Yanagihara, K., Yoshizawa, N., Zani, L., and Zito, P.

Subjects
assembly, Cryostat, Nuclear and High Energy Physics, Materials science, Tokamak, Nuclear engineering, Plasma, Condensed Matter Physics, Field coil, ITER risk mitigation, Overcurrent, law.invention, Control theory, law, Electromagnetic coil, research plan, broader approach, Voltage
Abstract

Construction of the JT-60SA tokamak was completed on schedule in March 2020. Manufacture and assembly of all the main tokamak components satisfied technical requirements, including dimensional accuracy and functional performances. Development of the plasma heating systems and diagnostics have also progressed, including the demonstration of the favourable electron cyclotron range of frequency (ECRF) transmission at multiple frequencies and the achievement of long sustainment of a high-energy intense negative ion beam. Development of all the tokamak operation control systems has been completed, together with an improved plasma equilibrium control scheme suitable for superconducting tokamaks including ITER. For preparation of the tokamak operation, plasma discharge scenarios have been established using this advanced equilibrium controller. Individual commissioning of the cryogenic system and the power supply system confirmed that these systems satisfy design requirements including operational schemes contributing directly to ITER, such as active control of heat load fluctuation of the cryoplant, which is essential for dynamic operation in superconducting tokamaks. The integrated commissioning (IC) is started by vacuum pumping of the vacuum vessel and cryostat, and then moved to cool-down of the tokamak and coil excitation tests. Transition to the super-conducting state was confirmed for all the TF, EF and CS coils. The TF coil current successfully reached 25.7 kA, which is the nominal operating current of the TF coil. For this nominal toroidal field of 2.25 T, ECRF was applied and an ECRF plasma was created. The IC was, however, suspended by an incident of over current of one of the superconducting equilibrium field coil and He leakage caused by insufficient voltage holding capability at a terminal joint of the coil. The unique importance of JT-60SA for H-mode and high-β steady-state plasma research has been confirmed using advanced integrated modellings. These experiences of assembly, IC and plasma operation of JT-60SA contribute to ITER risk mitigation and efficient implementation of ITER operation.

Published
2022

3. Progress in the ITER neutral beam test facility

Author

Toigo, V., primary, Dal Bello, S., additional, Bigi, M., additional, Boldrin, M., additional, Chitarin, G., additional, Grando, L., additional, Luchetta, A., additional, Marcuzzi, D., additional, Pasqualotto, R., additional, Pomaro, N., additional, Serianni, G., additional, Zaccaria, P., additional, Zanotto, L., additional, Agostinetti, P., additional, Agostini, M., additional, Antoni, V., additional, Aprile, D., additional, Barbisan, M., additional, Battistella, M., additional, Brombin, M., additional, Cavazzana, R., additional, Dalla Palma, M., additional, Dan, M., additional, Denizeau, S., additional, De Lorenzi, A., additional, Delogu, R., additional, De Muri, M., additional, Fadone, M., additional, Fellin, F., additional, Ferro, A., additional, Fiorentin, A., additional, Gaio, E., additional, Gambetta, G., additional, Gasparini, F., additional, Gnesotto, F., additional, Jain, P., additional, Maistrello, A., additional, Manduchi, G., additional, Manfrin, S., additional, Marchiori, G., additional, Marconato, N., additional, Moresco, M., additional, Ocello, E., additional, Patton, T., additional, Pavei, M., additional, Peruzzo, S., additional, Pilan, N., additional, Pimazzoni, A., additional, Piovan, R., additional, Poggi, C., additional, Recchia, M., additional, Rizzolo, A., additional, Rostagni, G., additional, Sartori, E., additional, Siragusa, M., additional, Sonato, P., additional, Sottocornola, A., additional, Spada, E., additional, Spagnolo, S., additional, Spolaore, M., additional, Taliercio, C., additional, Tinti, P., additional, Ugoletti, M., additional, Valente, M., additional, Zamengo, A., additional, Zaniol, B., additional, Zaupa, M., additional, Boilson, D., additional, Rotti, C., additional, Veltri, P., additional, Chareyre, J., additional, Decamps, H., additional, Dremel, M., additional, Graceffa, J., additional, Geli, F., additional, Schunke, B., additional, Svensson, L., additional, Urbani, M., additional, Bonicelli, T., additional, Agarici, G., additional, Garbuglia, A., additional, Masiello, A., additional, Paolucci, F., additional, Simon, M., additional, Bailly-Maitre, L., additional, Bragulat, E., additional, Gomez, G., additional, Gutierrez, D., additional, Labate, C., additional, Mico, G., additional, Moreno, J.F., additional, Pilard, V., additional, Kouzmenko, G., additional, Rousseau, A., additional, Kashiwagi, M., additional, Tobari, H., additional, Watanabe, K., additional, Maejima, T., additional, Kojima, A., additional, Umeda, N., additional, Sasaki, S., additional, Chakraborty, A., additional, Baruah, U., additional, Patel, H., additional, Singh, N.P., additional, Patel, A., additional, Dhola, H., additional, Raval, B., additional, Gupta, V., additional, Fantz, U., additional, Heinemann, B., additional, Kraus, W., additional, Cavenago, M., additional, Hanke, S., additional, Ochoa, S., additional, Blatchford, P., additional, Chuilon, B., additional, Xue, Y., additional, Croci, G., additional, Gorini, G., additional, Muraro, A., additional, Rebai, M., additional, Tardocchi, M., additional, D’Arienzo, M., additional, Sandri, S., additional, Tonti, A., additional, and Panin, F., additional

Published
2019
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5. Detailed design optimization of the MITICA negative ion accelerator in view of the ITER NBI

Author

Agostinetti, P., primary, Aprile, D., additional, Antoni, V., additional, Cavenago, M., additional, Chitarin, G., additional, de Esch, H.P.L., additional, De Lorenzi, A., additional, Fonnesu, N., additional, Gambetta, G., additional, Hemsworth, R.S., additional, Kashiwagi, M., additional, Marconato, N., additional, Marcuzzi, D., additional, Pilan, N., additional, Sartori, E., additional, Serianni, G., additional, Singh, M., additional, Sonato, P., additional, Spada, E., additional, Toigo, V., additional, Veltri, P., additional, and Zaccaria, P., additional

Published
2015
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6. Physics design of the HNB accelerator for ITER

Author

de Esch, H.P.L., primary, Kashiwagi, M., additional, Taniguchi, M., additional, Inoue, T., additional, Serianni, G., additional, Agostinetti, P., additional, Chitarin, G., additional, Marconato, N., additional, Sartori, E., additional, Sonato, P., additional, Veltri, P., additional, Pilan, N., additional, Aprile, D., additional, Fonnesu, N., additional, Antoni, V., additional, Singh, M.J., additional, Hemsworth, R.S., additional, and Cavenago, M., additional

Published
2015
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7. Progress in the realization of the PRIMA neutral beam test facility

Author

Toigo, V., primary, Boilson, D., additional, Bonicelli, T., additional, Piovan, R., additional, Hanada, M., additional, Chakraborty, A., additional, Agarici, G., additional, Antoni, V., additional, Baruah, U., additional, Bigi, M., additional, Chitarin, G., additional, Dal Bello, S., additional, Decamps, H., additional, Graceffa, J., additional, Kashiwagi, M., additional, Hemsworth, R., additional, Luchetta, A., additional, Marcuzzi, D., additional, Masiello, A., additional, Paolucci, F., additional, Pasqualotto, R., additional, Patel, H., additional, Pomaro, N., additional, Rotti, C., additional, Serianni, G., additional, Simon, M., additional, Singh, M., additional, Singh, N.P., additional, Svensson, L., additional, Tobari, H., additional, Watanabe, K., additional, Zaccaria, P., additional, Agostinetti, P., additional, Agostini, M., additional, Andreani, R., additional, Aprile, D., additional, Bandyopadhyay, M., additional, Barbisan, M., additional, Battistella, M., additional, Bettini, P., additional, Blatchford, P., additional, Boldrin, M., additional, Bonomo, F., additional, Bragulat, E., additional, Brombin, M., additional, Cavenago, M., additional, Chuilon, B., additional, Coniglio, A., additional, Croci, G., additional, Dalla Palma, M., additional, D’Arienzo, M., additional, Dave, R., additional, De Esch, H. P. L, additional, De Lorenzi, A., additional, De Muri, M., additional, Delogu, R., additional, Dhola, H., additional, Fantz, U., additional, Fellin, F., additional, Fellin, L., additional, Ferro, A., additional, Fiorentin, A., additional, Fonnesu, N., additional, Franzen, P., additional, Fröschle, M., additional, Gaio, E., additional, Gambetta, G., additional, Gomez, G., additional, Gnesotto, F., additional, Gorini, G., additional, Grando, L., additional, Gupta, V., additional, Gutierrez, D., additional, Hanke, S., additional, Hardie, C., additional, Heinemann, B., additional, Kojima, A., additional, Kraus, W., additional, Maeshima, T., additional, Maistrello, A., additional, Manduchi, G., additional, Marconato, N., additional, Mico, G., additional, Moreno, J. F., additional, Moresco, M., additional, Muraro, A., additional, Muvvala, V., additional, Nocentini, R., additional, Ocello, E., additional, Ochoa, S., additional, Parmar, D., additional, Patel, A., additional, Pavei, M., additional, Peruzzo, S., additional, Pilan, N., additional, Pilard, V., additional, Recchia, M., additional, Riedl, R., additional, Rizzolo, A., additional, Roopesh, G., additional, Rostagni, G., additional, Sandri, S., additional, Sartori, E., additional, Sonato, P., additional, Sottocornola, A., additional, Spagnolo, S., additional, Spolaore, M., additional, Taliercio, C., additional, Tardocchi, M., additional, Thakkar, A., additional, Umeda, N., additional, Valente, M., additional, Veltri, P., additional, Yadav, A., additional, Yamanaka, H., additional, Zamengo, A., additional, Zaniol, B., additional, Zanotto, L., additional, and Zaupa, M., additional

Published
2015
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8. Progress in long-pulse production of powerful negative ion beams for JT-60SA and ITER

Author

Kojima, A., primary, Umeda, N., additional, Hanada, M., additional, Yoshida, M., additional, Kashiwagi, M., additional, Tobari, H., additional, Watanabe, K., additional, Akino, N., additional, Komata, M., additional, Mogaki, K., additional, Sasaki, S., additional, Seki, N., additional, Nemoto, S., additional, Shimizu, T., additional, Endo, Y., additional, Ohasa, K., additional, Dairaku, M., additional, Yamanaka, H., additional, and Grisham, L.R., additional

Published
2015
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9. Achievement of 500 keV negative ion beam acceleration on JT-60U negative-ion-based neutral beam injector

Author

Kojima, A., primary, Hanada, M., additional, Tanaka, Y., additional, Kawai, M., additional, Akino, N., additional, Kazawa, M., additional, Komata, M., additional, Mogaki, K., additional, Usui, K., additional, Sasaki, S., additional, Kikuchi, K., additional, Seki, N., additional, Nemoto, S., additional, Oshima, K., additional, Simizu, T., additional, Kubo, N., additional, Oasa, K., additional, Inoue, T., additional, Watanabe, K., additional, Taniguchi, M., additional, Kashiwagi, M., additional, Tobari, H., additional, Umeda, N., additional, Kobayashi, S., additional, Yamano, Y., additional, and Grisham, L.R., additional

Published
2011
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11. Design of a −1 MV dc UHV power supply for ITER NBI

Author

Watanabe, K., primary, Yamamoto, M., additional, Takemoto, J., additional, Yamashita, Y., additional, Dairaku, M., additional, Kashiwagi, M., additional, Taniguchi, M., additional, Tobari, H., additional, Umeda, N., additional, Sakamoto, K., additional, and Inoue, T., additional

Published
2009
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17. Improvement of beam performance in the negative-ion based NBI system for JT-60U

Author

Umeda, N, primary, Grisham, L.R, additional, Yamamoto, T, additional, Kuriyama, M, additional, Kawai, M, additional, Ohga, T, additional, Mogaki, K, additional, Akino, N, additional, Yamazaki, H, additional, Usui, K, additional, Honda, A, additional, Guangjiu, L, additional, Watanabe, K, additional, Inoue, T, additional, Hanada, M, additional, Kashiwagi, M, additional, Morishita, T, additional, Dairaku, M, additional, and Takayanagi, T, additional

Published
2003
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18. 1?MeV, ampere class accelerator R&D for ITER

Author

Inoue, T., Kashiwagi, M., Taniguchi, M., Dairaku, M., Hanada, M., Watanabe, K., and Sakamoto, K.

Abstract

The present objective of the 1?MeV electrostatic accelerator R&D for the ITER NB system is the acceleration of ampere class negative ion beams at the required current density (200?A?m?2) up to the beam energy of 1?MeV. To produce such high current density H?ions, the KAMABOKO negative ion source was operated under high power arc discharge (?40?kW) and with Caesium seeding for enhancement of the negative ion surface production. The H?ion beams of 146?A?m?2(total ion current: 0.2?A) have been obtained stably at the beam energy of 836?keV (pulse length: ?0.2?s). The pulse length was limited due to the power density of the beams, which is more than twice as high as those of the existing negative ion based NB systems (JT-60U and LHD). A preliminary measurement of beam optics showed a beamlet divergence of ?5?mrad even in the beams of such high power density. The Bremsstrahlung generation as a consequence of electron acceleration was estimated. A discussion then follows for photoelectron production and possible breakdowns in insulators for the acceleration of higher current negative ions.

Published
2006
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19. Development of a dc 1?MV power supply technology for NB injectors

Author

Watanabe, K., Kashiwagi, M., Kawashima, S., Ono, Y., Yamashita, Y., Yamazaki, C., Hanada, M., Inoue, T., Taniguchi, M., Okumura, Y., and Sakamoto, K.

Abstract

Major issues of neutral beam (NB) injector power supplies are high-speed switching, regulation and transmission of dc ultra-high voltage (UHV) and suppression of surge energy input to the beam source at high voltage breakdown. A gate turn-off thyristor inverter type power supply where the control is performed on the low voltage ac side was designed for the ITER NB. Based on the remarkable progress of a high power IEGT (injection enhanced gate transistor), the design of the inverter has been modified to increase efficiency and compactness using such new elements. The power loss in the inverter is reduced to 0.5?MW from 1.6?MW by adopting the IEGT inverter system at the same frequency of 150?Hz. Further, power supply performance has been studied for higher frequency operation of the inverter at 300?Hz. It was confirmed that the voltage regulation was stable even when the filter capacitor was reduced to 1/5 of the original value by circuit simulation. For the transmission line of the dc UHV with intermediate voltages, a disc shape multi-conductor bushing with a transmission line test chamber has been developed. The dimensions of the bushing are 1.8?m (diameter) and 140?mm (thickness) at the edge. Electric fields at the conductor surface and insulator surface were designed to be lower than 5?kV?mm?1and 7?kV?mm?1, respectively. An electric field at the bottom of the ground potential outer conductor was designed to be lower than 1.2?kV?mm?1to prevent particle levitation which triggers breakdown. The prototype transmission line has passed the lightning impulse test up to 1300?kV. A dc UHV up to 1175?kV was successfully sustained for 300?s. To prevent electric damage of the beam source at high voltage breakdown, core snubbers using Fe-based nanocrystalline soft magnetic materials have been adopted to dissipate the surge energy.

Published
2006
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20. Progress in the ITER neutral beam test facility

Author

Piergiorgio Sonato, Hitesh Patel, A. Sottocornola, Veena Gupta, B. Raval, G. Rostagni, M. Spolaore, M. Fadone, A. Patel, Andrea Rizzolo, G. Gambetta, M. Recchia, Francesco Gnesotto, M. Brombin, Roberto Pasqualotto, M. Zaupa, J.F. Moreno, Giuseppe Marchiori, W. Kraus, P. Tinti, G. Serianni, G. Kouzmenko, Gabriele Manduchi, V. Antoni, A. Zamengo, F. Paolucci, Giuseppe Chitarin, M. Battistella, Tullio Bonicelli, C. Labate, V. Pilard, H. Decamps, C. Taliercio, Matteo Agostini, R. Piovan, G. Agarici, Mieko Kashiwagi, E. Ocello, Roberto Cavazzana, D. Boilson, Vanni Toigo, Barbara Zaniol, Marco Cavenago, F. Geli, A. De Lorenzi, M. Dremel, M. De Muri, Kazuhiro Watanabe, Nicola Pilan, Marco D’Arienzo, B. Schunke, M. Urbani, P. Jain, Namita Singh, T. Patton, A. Tonti, R. Delogu, N. Pomaro, A. Rousseau, F. Gasparini, T. Maejima, Naotaka Umeda, Ursel Fantz, H. Dhola, Marco Barbisan, C. Rotti, Lennart Svensson, M. Valente, Simone Peruzzo, G. Gomez, Elena Gaio, D. Aprile, Bernd Heinemann, Hiroyuki Tobari, Pierluigi Veltri, S. Manfrin, M. Siragusa, Muriel Simon, Luca Grando, Ujjwal Baruah, Silvia Spagnolo, F. Panin, A. Muraro, A.K. Chakraborty, A. Fiorentin, Adriano Luchetta, P. Zaccaria, G. Mico, A. Maistrello, C. Poggi, A. Masiello, M. Bigi, Diego Marcuzzi, Atsushi Kojima, S. Ochoa, P. Blatchford, Gabriele Croci, Y. Xue, A. Pimazzoni, Piero Agostinetti, E. Spada, Daniel Gutierrez, Marica Rebai, B. Chuilon, M. Dan, M. Moresco, L. Zanotto, A. Garbuglia, S. Denizeau, J. Chareyre, S. Hanke, M. Pavei, Sandro Sandri, L. Bailly-Maitre, M. Ugoletti, Emanuele Sartori, Nicolò Marconato, Giuseppe Gorini, M. Dalla Palma, J. Graceffa, M. Boldrin, S. Sasaki, Alberto Ferro, F. Fellin, S. Dal Bello, M. Tardocchi, E. Bragulat, Toigo, V, Dal Bello, S, Bigi, M, Boldrin, M, Chitarin, G, Grando, L, Luchetta, A, Marcuzzi, D, Pasqualotto, R, Pomaro, N, Serianni, G, Zaccaria, P, Zanotto, L, Agostinetti, P, Agostini, M, Antoni, V, Aprile, D, Barbisan, M, Battistella, M, Brombin, M, Cavazzana, R, Dalla Palma, M, Dan, M, Denizeau, S, De Lorenzi, A, Delogu, R, De Muri, M, Fadone, M, Fellin, F, Ferro, A, Fiorentin, A, Gaio, E, Gambetta, G, Gasparini, F, Gnesotto, F, Jain, P, Maistrello, A, Manduchi, G, Manfrin, S, Marchiori, G, Marconato, N, Moresco, M, Ocello, E, Patton, T, Pavei, M, Peruzzo, S, Pilan, N, Pimazzoni, A, Piovan, R, Poggi, C, Recchia, M, Rizzolo, A, Rostagni, G, Sartori, E, Siragusa, M, Sonato, P, Sottocornola, A, Spada, E, Spagnolo, S, Spolaore, M, Taliercio, C, Tinti, P, Ugoletti, M, Valente, M, Zamengo, A, Zaniol, B, Zaupa, M, Boilson, D, Rotti, C, Veltri, P, Chareyre, J, Decamps, H, Dremel, M, Graceffa, J, Geli, F, Schunke, B, Svensson, L, Urbani, M, Bonicelli, T, Agarici, G, Garbuglia, A, Masiello, A, Paolucci, F, Simon, M, Bailly-Maitre, L, Bragulat, E, Gomez, G, Gutierrez, D, Labate, C, Mico, G, Moreno, J, Pilard, V, Kouzmenko, G, Rousseau, A, Kashiwagi, M, Tobari, H, Watanabe, K, Maejima, T, Kojima, A, Umeda, N, Sasaki, S, Chakraborty, A, Baruah, U, Patel, H, Singh, N, Patel, A, Dhola, H, Raval, B, Gupta, V, Fantz, U, Heinemann, B, Kraus, W, Cavenago, M, Hanke, S, Ochoa, S, Blatchford, P, Chuilon, B, Xue, Y, Croci, G, Gorini, G, Muraro, A, Rebai, M, Tardocchi, M, D'Arienzo, M, Sandri, S, Tonti, A, Panin, F, Toigo, V., Dal Bello, S., Bigi, M., Boldrin, M., Chitarin, G., Grando, L., Luchetta, A., Marcuzzi, D., Pasqualotto, R., Pomaro, N., Serianni, G., Zaccaria, P., Zanotto, L., Agostinetti, P., Agostini, M., Antoni, V., Aprile, D., Barbisan, M., Battistella, M., Brombin, M., Cavazzana, R., Dalla Palma, M., Dan, M., Denizeau, S., De Lorenzi, A., Delogu, R., De Muri, M., Fadone, M., Fellin, F., Ferro, A., Fiorentin, A., Gaio, E., Gambetta, G., Gasparini, F., Gnesotto, F., Jain, P., Maistrello, A., Manduchi, G., Manfrin, S., Marchiori, G., Marconato, N., Moresco, M., Ocello, E., Patton, T., Pavei, M., Peruzzo, S., Pilan, N., Pimazzoni, A., Piovan, R., Poggi, C., Recchia, M., Rizzolo, A., Rostagni, G., Sartori, E., Siragusa, M., Sonato, P., Sottocornola, A., Spada, E., Spagnolo, S., Spolaore, M., Taliercio, C., Tinti, P., Ugoletti, M., Valente, M., Zamengo, A., Zaniol, B., Zaupa, M., Boilson, D., Rotti, C., Veltri, P., Chareyre, J., Decamps, H., Dremel, M., Graceffa, J., Geli, F., Schunke, B., Svensson, L., Urbani, M., Bonicelli, T., Agarici, G., Garbuglia, A., Masiello, A., Paolucci, F., Simon, M., Bailly-Maitre, L., Bragulat, E., Gomez, G., Gutierrez, D., Labate, C., Mico, G., Moreno, J. F., Pilard, V., Kouzmenko, G., Rousseau, A., Kashiwagi, M., Tobari, H., Watanabe, K., Maejima, T., Kojima, A., Umeda, N., Sasaki, S., Chakraborty, A., Baruah, U., Patel, H., Singh, N. P., Patel, A., Dhola, H., Raval, B., Gupta, V., Fantz, U., Heinemann, B., Kraus, W., Cavenago, M., Hanke, S., Ochoa, S., Blatchford, P., Chuilon, B., Xue, Y., Croci, G., Gorini, G., Muraro, A., Rebai, M., Tardocchi, M., D'Arienzo, M., Sandri, S., Tonti, A., and Panin, F.

Subjects
Nuclear and High Energy Physics, Materials science, Test facility, ITER, neutral beam injector, PRIMA: the ITER neutral beam test facility (NBTF), SPIDER, Nuclear engineering, Condensed Matter Physics, 01 natural sciences, 7. Clean energy, 010305 fluids & plasmas, Neutral beam injector, 0103 physical sciences, 010306 general physics, Beam (structure)
Abstract

Heating neutral beam (HNB) injectors, necessary to achieve burning conditions and to control plasma instabilities in ITER, are characterized by such demanding parameters that a neutral beam test facility (NBTF) dedicated to their development and optimization is being realized in Padua (Italy) with direct contributions from the Italian government (through Consorzio RFX as the host entity) and the ITER international organization (with kind contributions from the ITER domestic agencies of Europe, Japan and India) and technical and scientific support from various European laboratories and universities. The NBTF hosts two experiments: SPIDER, devoted to ion source optimization for the required source performance, and MITICA, the full-size prototype of the ITER HNB, with an ion source identical to SPIDER. This paper gives an overview of the progress towards NBTF realization, with particular emphasis on issues discovered during this phase of activity and on solutions adopted to minimize the impact on the schedule and maintain the goals of the facilities. The realization of MITICA is well advanced; operation is expected to start in 2023 due to the long procurement time of the in-vessel mechanical components. The beam source power supplies, operating at 1 MV, are in an advanced phase of realization; all high-voltage components have been installed and the complex insulation test phase began in 2018. At the same time, construction and installation of SPIDER plant systems was successfully completed with their integration into the facility. The mechanical components of the SPIDER ion source were installed inside the vessel and connected to the plants. Integrated commissioning with the control, protection and safety systems ended positively and the first experimental phase has begun. The first results of the SPIDER experiment, with data from operational diagnostics, and the plans for the 1 MV insulation tests on the MITICA high-voltage components are presented.

Published
2019
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