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16 results on '"Umeda, N."'

2. 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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4. 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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5. 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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6. 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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8. 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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10. Present status of the negative ion based NBI system for long pulse operation on JT-60U

Author

Ikeda, Y, primary, Umeda, N, additional, Akino, N, additional, Ebisawa, N, additional, Grisham, L, additional, Hanada, M, additional, Honda, A, additional, Inoue, T, additional, Kawai, M, additional, Kazawa, M, additional, Kikuchi, K, additional, Komata, M, additional, Mogaki, K, additional, Noto, K, additional, Okano, F, additional, Ohga, T, additional, Oshima, K, additional, Takenouchi, T, additional, Tanai, Y, additional, Usui, K, additional, Yamazaki, H, additional, and Yamamoto, T, additional

Published
2006
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11. Achievement of high fusion triple product, steady-state sustainment and real-time NTM stabilization in high- pELMy H-mode discharges in JT-60U

Author

Isayama, A, primary, Kamada, Y, additional, Hayashi, N, additional, Suzuki, T, additional, Oikawa, T, additional, Fujita, T, additional, Fukuda, T, additional, Ide, S, additional, Takenaga, H, additional, Ushigusa, K, additional, Ozeki, T, additional, Ikeda, Y, additional, Umeda, N, additional, Yamada, H, additional, Isobe, M, additional, Narushima, Y, additional, Ikeda, K, additional, Sakakibara, S, additional, Yamazaki, K, additional, Nagasaki, K, additional, and Team, the JT-60, additional

Published
2003
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12. 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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13. Reactor relevant current drive and heating by N-NBI on JT-60U

Author

Oikawa, T, primary, Kamada, Y, additional, Isayama, A, additional, Fujita, T, additional, Suzuki, T, additional, Umeda, N, additional, Kawai, M, additional, Kuriyama, M, additional, Grisham, L.R, additional, Ikeda, Y, additional, Kajiwara, K, additional, Ushigusa, K, additional, Tobita, K, additional, Morioka, A, additional, Takechi, M, additional, Itoh, T, additional, and Team, JT-60, additional

Published
2001
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15. Achievement of high fusion triple product, steady-state sustainment and real-time NTM stabilization in high-β<SUB>p</SUB> ELMy H-mode discharges in JT-60U

Author

Isayama, A., Kamada, Y., Hayashi, N., Suzuki, T., Oikawa, T., Fujita, T., Fukuda, T., Ide, S., Takenaga, H., Ushigusa, K., Ozeki, T., Ikeda, Y., Umeda, N., Yamada, H., Isobe, M., Narushima, Y., Ikeda, K., Sakakibara, S., Yamazaki, K., Nagasaki, K., and Team, the JT-60

Abstract

This paper reports results on the progress in steady-state high-βp ELMy H-mode discharges in JT-60U. A fusion triple product, nD(0)τETi(0), of 3.1 × 1020 m−3 s keV under full non-inductive current drive has been achieved at Ip = 1.8 MA, which extends the record value of the fusion triple product under full non-inductive current drive by 50%. A high-beta plasma with βN ~ 2.7 has been sustained for 7.4 s (~60τE), with the duration determined only by the facility limits, such as the capability of the poloidal field coils and the upper limit on the duration of injection of neutral beams. Destabilization of neoclassical tearing modes (NTMs) has been avoided with good reproducibility by tailoring the current and pressure profiles. On the other hand, a real-time NTM stabilization system has been developed where detection of the centre of the magnetic island and optimization of the injection angle of the electron cyclotron wave are done in real time. By applying this system, a 3/2 NTM has been completely stabilized in a high-beta region (βp ~ 1.2, βN ~ 1.5), and the beta value and confinement enhancement factor have been improved by the stabilization.

Published
2003

16. 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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