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1. Lessons learned after three years of SPIDER operation and the first MITICA integrated tests

Author

Marcuzzi, D., Toigo, V., Boldrin, M., Chitarin, G., Bello, S. Dal, Grando, L., Luchetta, A., Pasqualotto, R., Pavei, M., Serianni, G., Zanotto, L., Agnello, R., Agostinetti, P., Agostini, M., Aprile, D., Barbisan, M., Battistella, M., Berton, G., Bigi, M., Brombin, M., Candela, V., Candeloro, V., Canton, A., Casagrande, R., Cavallini, C., Cavazzana, R., Cordaro, L., Cruz, N., Palma, M. Dalla, Dan, M., De Lorenzi, A., Delogu, R., De Muri, M., De Nardi, M., Denizeau, S., Fadone, M., Fellin, F., Ferro, A., Gaio, E., Gasparrini, C., Gnesotto, F., Jain, P., La Rosa, A., Lopez-Bruna, D., Lorenzini, R., Maistrello, A., Manduchi, G., Manfrin, S., Marconato, N., Mario, I., Martini, G., Milazzo, R., Patton, T., Peruzzo, S., Pilan, N., Pimazzoni, A., Poggi, C., Pomaro, N., Pouradier-Duteil, B., Recchia, M., Rigoni-Garola, A., Rizzetto, D., Rizzolo, A., Santoro, F., Sartori, E., Segalini, B., Shepherd, A., Siragusa, M., Sonato, P., Sottocornola, A., Spada, E., Spagnolo, S., Spolaore, M., Taliercio, C., Tinti, P., Tomsič, P., Trevisan, L., Ugoletti, M., Valente, M., Valisa, M., Veronese, F., Vignando, M., Zaccaria, P., Zagorski, R., Zaniol, B., Zaupa, M., Zuin, M., Cavenago, M., Boilson, D., Rotti, C., Decamps, H., Geli, F., Sharma, A., Veltri, P., Zacks, J., Simon, M., Paolucci, F., Garbuglia, A., Gutierrez, D., Masiello, A., Mico, G., Labate, C., Readman, P., Bragulat, E., Bailly-Maitre, L., Gomez, G., Kouzmenko, G., Albajar, F., Kashiwagi, M., Tobari, H., Kojima, A., Murayama, M., Hatakeyama, S., Oshita, E., Maejima, T., Shibata, N., Yamashita, Y., Watanabe, K., Singh, N. P., Singh, M. J., Dhola, H., Fantz, U., Heinemann, B., Wimmer, C., Wünderlich, D., Tsumori, K., Croci, G., Gorini, G., Muraro, A., Rebai, M., Tardocchi, M., Giacomelli, L., Rigamonti, D., Taccogna, F., Bruno, D., Rutigliano, M., Longo, S., Deambrosis, S., Miorin, E., Montagner, F., Tonti, A., and Panin, F.

Subjects
Physics - Plasma Physics, Physics - Accelerator Physics
Abstract

ITER envisages the use of two heating neutral beam injectors plus an optional one as part of the auxiliary heating and current drive system. The 16.5 MW expected neutral beam power per injector is several notches higher than worldwide existing facilities. A Neutral Beam Test Facility (NBTF) was established at Consorzio RFX, exploiting the synergy of two test beds, SPIDER and MITICA. SPIDER is dedicated to developing and characterizing large efficient negative ion sources at relevant parameters in ITER-like conditions: source and accelerator located in the same vacuum where the beam propagates, immunity to electromagnetic interferences of multiple radio-frequency (RF) antennas, avoidance of RF-induced discharges on the outside of the source. Three years of experiments on SPIDER have addressed to the necessary design modifications to enable full performances. The source is presently under a long shut-down phase to incorporate learnings from the experimental campaign. Parallelly, developments on MITICA, the full-scale prototype of the ITER NBI featuring a 1 MV accelerator and ion neutralization, are underway including manufacturing of in-vessel components, while power supplies and auxiliary plants are already under final testing and commissioning. Integration, commissioning and tests of the 1MV power supplies are essential for this first-of-kind system, unparalleled both in research and industry field. The integrated test to confirm 1MV output by combining invertor systems, DC generators and transmission lines extracted errors/accidents in some components. To realize a concrete system for ITER, solutions for the repair and the improvement of the system were developed. Hence, NBTF is emerging as a necessary facility, due to the large gap with existing injectors, effectively dedicated to identify issues and find solutions to enable successful ITER NBI operations in a time bound fashion.

Published
2023
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2. On the road to ITER NBIs: SPIDER improvement after first operation and MITICA construction progress

Author

Toigo, V., Marcuzzi, D., Serianni, G., Boldrin, M., Chitarin, G., Bello, S. Dal, Grando, L., Luchetta, A., Pasqualotto, R., Zaccaria, P., Zanotto, L., Agnello, R., Agostinetti, P., Agostini, M., Antoni, V., Aprile, D., Barbisan, M., Battistella, M., Berton, G., Bigi, M., Brombin, M., Candeloro, V., Canton, A., Casagrande, R., Cavallini, C., Cavazzana, R., Cordaro, L., Cruz, N., Palma, M. Dalla, Dan, M., De Lorenzi, A., Delogu, R., De Muri, M., Denizeau, S., Fadone, M., Fellin, F., Ferro, A., Gaio, E., Gasparini, F., Gasparrini, C., Gnesotto, F., Jain, P., Krastev, P., Lopez-Bruna, D., Lorenzini, R., Maistrello, A., Manduchi, G., Manfrin, S., Marconato, N., Martines, E., Martini, G., Martini, S., Milazzo, R., Patton, T., Pavei, M., Peruzzo, S., Pilan, N., Pimazzoni, A., Poggi, C., Pomaro, N., Pouradier-Duteil, B., Recchia, M., Rigoni-Garola, A., Rizzolo, A., Sartori, E., Shepherd, A., Siragusa, M., Sonato, P., Sottocornola, A., Spada, E., Spagnolo, S., Spolaore, M., Taliercio, C., Terranova, D., Tinti, P., Tomsič, P., Trevisan, L., Ugoletti, M., Valente, M., Vignando, M., Zagorski, R., Zamengo, A., Zaniol, B., Zaupa, M., Zuin, M., Cavenago, M., Boilson, D., Rotti, C., Veltri, P., Decamps, H., Dremel, M., Graceffa, J., Geli, F., Urbani, M., Zacks, J., Bonicelli, T., Paolucci, F., Garbuglia, A., Agarici, G., Gomez, G., Gutierrez, D., Kouzmenko, G., Labate, C., Masiello, A., Mico, G., Moreno, J-F, Pilard, V., Rousseau, A., Simon, M., Kashiwagi, M., Tobari, H., Watanabe, K., Maejima, T., Kojima, A., Oshita, E., Yamashita, Y., Konno, S., Singh, M., Chakraborty, A., Patel, H., Singh, N.P., Fantz, U., Bonomo, F., Cristofaro, S., Heinemann, B., Kraus, W., Wimmer, C., Wünderlich, D., Fubiani, G., Tsumori, K., Croci, G., Gorini, G., McCormack, O., Muraro, A., Rebai, M., Tardocchi, M., Giacomelli, L., Rigamonti, D., Taccogna, F., Bruno, D., Rutigliano, M., D'Arienzo, M., Tonti, A., and Panin, F.

Published
2021
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3. Lessons learned after three years of SPIDER operation and the first MITICA integrated tests

Author

Marcuzzi, D, Toigo, V, Boldrin, M, Chitarin, G, Dal Bello, S, Grando, L, Luchetta, A, Pasqualotto, R, Pavei, M, Serianni, G, Zanotto, L, Agnello, R, Agostinetti, P, Agostini, M, Aprile, D, Barbisan, M, Battistella, M, Berton, G, Bigi, M, Brombin, M, Candela, V, Candeloro, V, Canton, A, Casagrande, R, Cavallini, C, Cavazzana, R, Cordaro, L, Cruz, N, Dalla Palma, M, Dan, M, De Lorenzi, A, Delogu, R, De Muri, M, De Nardi, M, Denizeau, S, Fadone, M, Fellin, F, Ferro, A, Gaio, E, Gasparrini, C, Gnesotto, F, Jain, P, La Rosa, A, Lopez-Bruna, D, Lorenzini, R, Maistrello, A, Manduchi, G, Manfrin, S, Marconato, N, Mario, I, Martini, G, Milazzo, R, Patton, T, Peruzzo, S, Pilan, N, Pimazzoni, A, Poggi, C, Pomaro, N, Pouradier-Duteil, B, Recchia, M, Rigoni-Garola, A, Rizzetto, D, Rizzolo, A, Santoro, F, Sartori, E, Segalini, B, Shepherd, A, Siragusa, M, Sonato, P, Sottocornola, A, Spada, E, Spagnolo, S, Spolaore, M, Taliercio, C, Tinti, P, Tomsic, P, Trevisan, L, Ugoletti, M, Valente, M, Valisa, M, Veronese, F, Vignando, M, Zaccaria, P, Zagorski, R, Zaniol, B, Zaupa, M, Zuin, M, Cavenago, M, Boilson, D, Rotti, C, Decamps, H, Geli, F, Sharma, A, Veltri, P, Zacks, J, Simon, M, Paolucci, F, Garbuglia, A, Gutierrez, D, Masiello, A, Mico, G, Labate, C, Readman, P, Bragulat, E, Bailly-Maitre, L, Gomez, G, Kouzmenko, G, Albajar, F, Kashiwagi, M, Tobari, H, Kojima, A, Murayama, M, Hatakeyama, S, Oshita, E, Maejima, T, Shibata, N, Yamashita, Y, Watanabe, K, Singh, N, Singh, M, Dhola, H, Fantz, U, Heinemann, B, Wimmer, C, Wunderlich, D, Tsumori, K, Croci, G, Gorini, G, Muraro, A, Rebai, M, Tardocchi, M, Giacomelli, L, Rigamonti, D, Taccogna, F, Bruno, D, Rutigliano, M, Longo, S, Deambrosis, S, Miorin, E, Montagner, F, Tonti, A, Panin, F, Marcuzzi D., Toigo V., Boldrin M., Chitarin G., Dal Bello S., Grando L., Luchetta A., Pasqualotto R., Pavei M., Serianni G., Zanotto L., Agnello R., Agostinetti P., Agostini M., Aprile D., Barbisan M., Battistella M., Berton G., Bigi M., Brombin M., Candela V., Candeloro V., Canton A., Casagrande R., Cavallini C., Cavazzana R., Cordaro L., Cruz N., Dalla Palma M., Dan M., De Lorenzi A., Delogu R., De Muri M., De Nardi M., Denizeau S., Fadone M., Fellin F., Ferro A., Gaio E., Gasparrini C., Gnesotto F., Jain P., La Rosa A., Lopez-Bruna D., Lorenzini R., Maistrello A., Manduchi G., Manfrin S., Marconato N., Mario I., Martini G., Milazzo R., Patton T., Peruzzo S., Pilan N., Pimazzoni A., Poggi C., Pomaro N., Pouradier-Duteil B., Recchia M., Rigoni-Garola A., Rizzetto D., Rizzolo A., Santoro F., Sartori E., Segalini B., Shepherd A., Siragusa M., Sonato P., Sottocornola A., Spada E., Spagnolo S., Spolaore M., Taliercio C., Tinti P., Tomsic P., Trevisan L., Ugoletti M., Valente M., Valisa M., Veronese F., Vignando M., Zaccaria P., Zagorski R., Zaniol B., Zaupa M., Zuin M., Cavenago M., Boilson D., Rotti C., Decamps H., Geli F., Sharma A., Veltri P., Zacks J., Simon M., Paolucci F., Garbuglia A., Gutierrez D., Masiello A., Mico G., Labate C., Readman P., Bragulat E., Bailly-Maitre L., Gomez G., Kouzmenko G., Albajar F., Kashiwagi M., Tobari H., Kojima A., Murayama M., Hatakeyama S., Oshita E., Maejima T., Shibata N., Yamashita Y., Watanabe K., Singh N. P., Singh M. J., Dhola H., Fantz U., Heinemann B., Wimmer C., Wunderlich D., Tsumori K., Croci G., Gorini G., Muraro A., Rebai M., Tardocchi M., Giacomelli L., Rigamonti D., Taccogna F., Bruno D., Rutigliano M., Longo S., Deambrosis S., Miorin E., Montagner F., Tonti A., Panin F., Marcuzzi, D, Toigo, V, Boldrin, M, Chitarin, G, Dal Bello, S, Grando, L, Luchetta, A, Pasqualotto, R, Pavei, M, Serianni, G, Zanotto, L, Agnello, R, Agostinetti, P, Agostini, M, Aprile, D, Barbisan, M, Battistella, M, Berton, G, Bigi, M, Brombin, M, Candela, V, Candeloro, V, Canton, A, Casagrande, R, Cavallini, C, Cavazzana, R, Cordaro, L, Cruz, N, Dalla Palma, M, Dan, M, De Lorenzi, A, Delogu, R, De Muri, M, De Nardi, M, Denizeau, S, Fadone, M, Fellin, F, Ferro, A, Gaio, E, Gasparrini, C, Gnesotto, F, Jain, P, La Rosa, A, Lopez-Bruna, D, Lorenzini, R, Maistrello, A, Manduchi, G, Manfrin, S, Marconato, N, Mario, I, Martini, G, Milazzo, R, Patton, T, Peruzzo, S, Pilan, N, Pimazzoni, A, Poggi, C, Pomaro, N, Pouradier-Duteil, B, Recchia, M, Rigoni-Garola, A, Rizzetto, D, Rizzolo, A, Santoro, F, Sartori, E, Segalini, B, Shepherd, A, Siragusa, M, Sonato, P, Sottocornola, A, Spada, E, Spagnolo, S, Spolaore, M, Taliercio, C, Tinti, P, Tomsic, P, Trevisan, L, Ugoletti, M, Valente, M, Valisa, M, Veronese, F, Vignando, M, Zaccaria, P, Zagorski, R, Zaniol, B, Zaupa, M, Zuin, M, Cavenago, M, Boilson, D, Rotti, C, Decamps, H, Geli, F, Sharma, A, Veltri, P, Zacks, J, Simon, M, Paolucci, F, Garbuglia, A, Gutierrez, D, Masiello, A, Mico, G, Labate, C, Readman, P, Bragulat, E, Bailly-Maitre, L, Gomez, G, Kouzmenko, G, Albajar, F, Kashiwagi, M, Tobari, H, Kojima, A, Murayama, M, Hatakeyama, S, Oshita, E, Maejima, T, Shibata, N, Yamashita, Y, Watanabe, K, Singh, N, Singh, M, Dhola, H, Fantz, U, Heinemann, B, Wimmer, C, Wunderlich, D, Tsumori, K, Croci, G, Gorini, G, Muraro, A, Rebai, M, Tardocchi, M, Giacomelli, L, Rigamonti, D, Taccogna, F, Bruno, D, Rutigliano, M, Longo, S, Deambrosis, S, Miorin, E, Montagner, F, Tonti, A, Panin, F, Marcuzzi D., Toigo V., Boldrin M., Chitarin G., Dal Bello S., Grando L., Luchetta A., Pasqualotto R., Pavei M., Serianni G., Zanotto L., Agnello R., Agostinetti P., Agostini M., Aprile D., Barbisan M., Battistella M., Berton G., Bigi M., Brombin M., Candela V., Candeloro V., Canton A., Casagrande R., Cavallini C., Cavazzana R., Cordaro L., Cruz N., Dalla Palma M., Dan M., De Lorenzi A., Delogu R., De Muri M., De Nardi M., Denizeau S., Fadone M., Fellin F., Ferro A., Gaio E., Gasparrini C., Gnesotto F., Jain P., La Rosa A., Lopez-Bruna D., Lorenzini R., Maistrello A., Manduchi G., Manfrin S., Marconato N., Mario I., Martini G., Milazzo R., Patton T., Peruzzo S., Pilan N., Pimazzoni A., Poggi C., Pomaro N., Pouradier-Duteil B., Recchia M., Rigoni-Garola A., Rizzetto D., Rizzolo A., Santoro F., Sartori E., Segalini B., Shepherd A., Siragusa M., Sonato P., Sottocornola A., Spada E., Spagnolo S., Spolaore M., Taliercio C., Tinti P., Tomsic P., Trevisan L., Ugoletti M., Valente M., Valisa M., Veronese F., Vignando M., Zaccaria P., Zagorski R., Zaniol B., Zaupa M., Zuin M., Cavenago M., Boilson D., Rotti C., Decamps H., Geli F., Sharma A., Veltri P., Zacks J., Simon M., Paolucci F., Garbuglia A., Gutierrez D., Masiello A., Mico G., Labate C., Readman P., Bragulat E., Bailly-Maitre L., Gomez G., Kouzmenko G., Albajar F., Kashiwagi M., Tobari H., Kojima A., Murayama M., Hatakeyama S., Oshita E., Maejima T., Shibata N., Yamashita Y., Watanabe K., Singh N. P., Singh M. J., Dhola H., Fantz U., Heinemann B., Wimmer C., Wunderlich D., Tsumori K., Croci G., Gorini G., Muraro A., Rebai M., Tardocchi M., Giacomelli L., Rigamonti D., Taccogna F., Bruno D., Rutigliano M., Longo S., Deambrosis S., Miorin E., Montagner F., Tonti A., and Panin F.

Abstract

ITER envisages the use of two heating neutral beam injectors plus an optional one as part of the auxiliary heating and current drive system, to reach the desired performances during its various phases of operation. The 16.5 MW expected neutral beam power per injector is several notches higher than worldwide existing facilities. In order to enable such development, a Neutral Beam Test Facility (NBTF) was established at Consorzio RFX, exploiting the synergy of two test beds, called SPIDER and MITICA. SPIDER is dedicated developing and characterizing large efficient negative ion sources at relevant parameters in ITER-like conditions: source and accelerator located in the same vacuum where the beam propagates, immunity to electromagnetic interferences of multiple radio-frequency (RF) antennas, avoidance of RF-induced discharges on the outside of the source. Three years of experiments on SPIDER have addressed to the necessary design modifications to enable full performances. The source is presently under a long shut-down phase to incorporate learnings from the experimental campaign, in particular events/issues occurred during operation, which led to the identification of improvement opportunities/necessities (e.g. RF discharges, local burns, water leaks, other damages, configuration/design upgrades to maximize chances/margin to quest target parameters). Parallelly, developments on MITICA, the full-scale prototype of the ITER Neutral Beam Injector (NBI) featuring a 1 MV accelerator and ion neutralization, are underway including manufacturing of the beam source, accelerator and the beam line components, while power supplies and auxiliary plants, already installed, are under final testing and commissioning. Integration, commissioning and tests of the 1 MV power supplies are essential for this first-of-kind system, unparalleled both in research and industry field. 1.2 MV dc insulating tests of high voltage components were successfully completed. The integrated test to confir

Published
2023

4. Lessons learned after three years of SPIDER operation and the first MITICA integrated tests

Author

Marcuzzi, D., primary, Toigo, V., additional, Boldrin, M., additional, Chitarin, G., additional, Dal Bello, S., additional, Grando, L., additional, Luchetta, A., additional, Pasqualotto, R., additional, Pavei, M., additional, Serianni, G., additional, Zanotto, L., additional, Agnello, R., additional, Agostinetti, P., additional, Agostini, M., additional, Aprile, D., additional, Barbisan, M., additional, Battistella, M., additional, Berton, G., additional, Bigi, M., additional, Brombin, M., additional, Candela, V., additional, Candeloro, V., additional, Canton, A., additional, Casagrande, R., additional, Cavallini, C., additional, Cavazzana, R., additional, Cordaro, L., additional, Cruz, N., additional, Dalla Palma, M., additional, Dan, M., additional, De Lorenzi, A., additional, Delogu, R., additional, De Muri, M., additional, De Nardi, M., additional, Denizeau, S., additional, Fadone, M., additional, Fellin, F., additional, Ferro, A., additional, Gaio, E., additional, Gasparrini, C., additional, Gnesotto, F., additional, Jain, P., additional, La Rosa, A., additional, Lopez-Bruna, D., additional, Lorenzini, R., additional, Maistrello, A., additional, Manduchi, G., additional, Manfrin, S., additional, Marconato, N., additional, Mario, I., additional, Martini, G., additional, Milazzo, R., additional, Patton, T., additional, Peruzzo, S., additional, Pilan, N., additional, Pimazzoni, A., additional, Poggi, C., additional, Pomaro, N., additional, Pouradier-Duteil, B., additional, Recchia, M., additional, Rigoni-Garola, A., additional, Rizzetto, D., additional, Rizzolo, A., additional, Santoro, F., additional, Sartori, E., additional, Segalini, B., additional, Shepherd, A., 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, Tomsič, P., additional, Trevisan, L., additional, Ugoletti, M., additional, Valente, M., additional, Valisa, M., additional, Veronese, F., additional, Vignando, M., additional, Zaccaria, P., additional, Zagorski, R., additional, Zaniol, B., additional, Zaupa, M., additional, Zuin, M., additional, Cavenago, M., additional, Boilson, D., additional, Rotti, C., additional, Decamps, H., additional, Geli, F., additional, Sharma, A., additional, Veltri, P., additional, Zacks, J., additional, Simon, M., additional, Paolucci, F., additional, Garbuglia, A., additional, Gutierrez, D., additional, Masiello, A., additional, Mico, G., additional, Labate, C., additional, Readman, P., additional, Bragulat, E., additional, Bailly-Maitre, L., additional, Gomez, G., additional, Kouzmenko, G., additional, Albajar, F., additional, Kashiwagi, M., additional, Tobari, H., additional, Kojima, A., additional, Murayama, M., additional, Hatakeyama, S., additional, Oshita, E., additional, Maejima, T., additional, Shibata, N., additional, Yamashita, Y., additional, Watanabe, K., additional, Singh, N.P., additional, Singh, M.J., additional, Dhola, H., additional, Fantz, U., additional, Heinemann, B., additional, Wimmer, C., additional, Wünderlich, D., additional, Tsumori, K., additional, Croci, G., additional, Gorini, G., additional, Muraro, A., additional, Rebai, M., additional, Tardocchi, M., additional, Giacomelli, L., additional, Rigamonti, D., additional, Taccogna, F., additional, Bruno, D., additional, Rutigliano, M., additional, Longo, S., additional, Deambrosis, S., additional, Miorin, E., additional, Montagner, F., additional, Tonti, A., additional, and Panin, F., additional

Published
2023
Full Text
View/download PDF

5. On the road to ITER NBIs: SPIDER improvement after first operation and MITICA construction progress

Author

Toigo, V, Marcuzzi, D, Serianni, G, Boldrin, M, Chitarin, G, Bello, S, Grando, L, Luchetta, A, Pasqualotto, R, Zaccaria, P, Zanotto, L, Agnello, R, Agostinetti, P, Agostini, M, Antoni, V, Aprile, D, Barbisan, M, Battistella, M, Berton, G, Bigi, M, Brombin, M, Candeloro, V, Canton, A, Casagrande, R, Cavallini, C, Cavazzana, R, Cordaro, L, Cruz, N, Palma, M, Dan, M, De Lorenzi, A, Delogu, R, De Muri, M, Denizeau, S, Fadone, M, Fellin, F, Ferro, A, Gaio, E, Gasparini, F, Gasparrini, C, Gnesotto, F, Jain, P, Krastev, P, Lopez-Bruna, D, Lorenzini, R, Maistrello, A, Manduchi, G, Manfrin, S, Marconato, N, Martines, E, Martini, G, Martini, S, Milazzo, R, Patton, T, Pavei, M, Peruzzo, S, Pilan, N, Pimazzoni, A, Poggi, C, Pomaro, N, Pouradier-Duteil, B, Recchia, M, Rigoni-Garola, A, Rizzolo, A, Sartori, E, Shepherd, A, Siragusa, M, Sonato, P, Sottocornola, A, Spada, E, Spagnolo, S, Spolaore, M, Taliercio, C, Terranova, D, Tinti, P, Tomsic, P, Trevisan, L, Ugoletti, M, Valente, M, Vignando, M, Zagorski, R, Zamengo, A, Zaniol, B, Zaupa, M, Zuin, M, Cavenago, M, Boilson, D, Rotti, C, Veltri, P, Decamps, H, Dremel, M, Graceffa, J, Geli, F, Urbani, M, Zacks, J, Bonicelli, T, Paolucci, F, Garbuglia, A, Agarici, G, Gomez, G, Gutierrez, D, Kouzmenko, G, Labate, C, Masiello, A, Mico, G, Moreno, J, Pilard, V, Rousseau, A, Simon, M, Kashiwagi, M, Tobari, H, Watanabe, K, Maejima, T, Kojima, A, Oshita, E, Yamashita, Y, Konno, S, Singh, M, Chakraborty, A, Patel, H, Singh, N, Fantz, U, Bonomo, F, Cristofaro, S, Heinemann, B, Kraus, W, Wimmer, C, Wunderlich, D, Fubiani, G, Tsumori, K, Croci, G, Gorini, G, Mccormack, O, Muraro, A, Rebai, M, Tardocchi, M, Giacomelli, L, Rigamonti, D, Taccogna, F, Bruno, D, Rutigliano, M, D'Arienzo, M, Tonti, A, Panin, F, Toigo V., Marcuzzi D., Serianni G., Boldrin M., Chitarin G., Bello S. D., Grando L., Luchetta A., Pasqualotto R., Zaccaria P., Zanotto L., Agnello R., Agostinetti P., Agostini M., Antoni V., Aprile D., Barbisan M., Battistella M., Berton G., Bigi M., Brombin M., Candeloro V., Canton A., Casagrande R., Cavallini C., Cavazzana R., Cordaro L., Cruz N., Palma M. D., Dan M., De Lorenzi A., Delogu R., De Muri M., Denizeau S., Fadone M., Fellin F., Ferro A., Gaio E., Gasparini F., Gasparrini C., Gnesotto F., Jain P., Krastev P., Lopez-Bruna D., Lorenzini R., Maistrello A., Manduchi G., Manfrin S., Marconato N., Martines E., Martini G., Martini S., Milazzo R., Patton T., Pavei M., Peruzzo S., Pilan N., Pimazzoni A., Poggi C., Pomaro N., Pouradier-Duteil B., Recchia M., Rigoni-Garola A., Rizzolo A., Sartori E., Shepherd A., Siragusa M., Sonato P., Sottocornola A., Spada E., Spagnolo S., Spolaore M., Taliercio C., Terranova D., Tinti P., Tomsic P., Trevisan L., Ugoletti M., Valente M., Vignando M., Zagorski R., Zamengo A., Zaniol B., Zaupa M., Zuin M., Cavenago M., Boilson D., Rotti C., Veltri P., Decamps H., Dremel M., Graceffa J., Geli F., Urbani M., Zacks J., Bonicelli T., Paolucci F., Garbuglia A., Agarici G., Gomez G., Gutierrez D., Kouzmenko G., Labate C., Masiello A., Mico G., Moreno J. -F., Pilard V., Rousseau A., Simon M., Kashiwagi M., Tobari H., Watanabe K., Maejima T., Kojima A., Oshita E., Yamashita Y., Konno S., Singh M., Chakraborty A., Patel H., Singh N. P., Fantz U., Bonomo F., Cristofaro S., Heinemann B., Kraus W., Wimmer C., Wunderlich D., Fubiani G., Tsumori K., Croci G., Gorini G., McCormack O., Muraro A., Rebai M., Tardocchi M., Giacomelli L., Rigamonti D., Taccogna F., Bruno D., Rutigliano M., D'Arienzo M., Tonti A., Panin F., Toigo, V, Marcuzzi, D, Serianni, G, Boldrin, M, Chitarin, G, Bello, S, Grando, L, Luchetta, A, Pasqualotto, R, Zaccaria, P, Zanotto, L, Agnello, R, Agostinetti, P, Agostini, M, Antoni, V, Aprile, D, Barbisan, M, Battistella, M, Berton, G, Bigi, M, Brombin, M, Candeloro, V, Canton, A, Casagrande, R, Cavallini, C, Cavazzana, R, Cordaro, L, Cruz, N, Palma, M, Dan, M, De Lorenzi, A, Delogu, R, De Muri, M, Denizeau, S, Fadone, M, Fellin, F, Ferro, A, Gaio, E, Gasparini, F, Gasparrini, C, Gnesotto, F, Jain, P, Krastev, P, Lopez-Bruna, D, Lorenzini, R, Maistrello, A, Manduchi, G, Manfrin, S, Marconato, N, Martines, E, Martini, G, Martini, S, Milazzo, R, Patton, T, Pavei, M, Peruzzo, S, Pilan, N, Pimazzoni, A, Poggi, C, Pomaro, N, Pouradier-Duteil, B, Recchia, M, Rigoni-Garola, A, Rizzolo, A, Sartori, E, Shepherd, A, Siragusa, M, Sonato, P, Sottocornola, A, Spada, E, Spagnolo, S, Spolaore, M, Taliercio, C, Terranova, D, Tinti, P, Tomsic, P, Trevisan, L, Ugoletti, M, Valente, M, Vignando, M, Zagorski, R, Zamengo, A, Zaniol, B, Zaupa, M, Zuin, M, Cavenago, M, Boilson, D, Rotti, C, Veltri, P, Decamps, H, Dremel, M, Graceffa, J, Geli, F, Urbani, M, Zacks, J, Bonicelli, T, Paolucci, F, Garbuglia, A, Agarici, G, Gomez, G, Gutierrez, D, Kouzmenko, G, Labate, C, Masiello, A, Mico, G, Moreno, J, Pilard, V, Rousseau, A, Simon, M, Kashiwagi, M, Tobari, H, Watanabe, K, Maejima, T, Kojima, A, Oshita, E, Yamashita, Y, Konno, S, Singh, M, Chakraborty, A, Patel, H, Singh, N, Fantz, U, Bonomo, F, Cristofaro, S, Heinemann, B, Kraus, W, Wimmer, C, Wunderlich, D, Fubiani, G, Tsumori, K, Croci, G, Gorini, G, Mccormack, O, Muraro, A, Rebai, M, Tardocchi, M, Giacomelli, L, Rigamonti, D, Taccogna, F, Bruno, D, Rutigliano, M, D'Arienzo, M, Tonti, A, Panin, F, Toigo V., Marcuzzi D., Serianni G., Boldrin M., Chitarin G., Bello S. D., Grando L., Luchetta A., Pasqualotto R., Zaccaria P., Zanotto L., Agnello R., Agostinetti P., Agostini M., Antoni V., Aprile D., Barbisan M., Battistella M., Berton G., Bigi M., Brombin M., Candeloro V., Canton A., Casagrande R., Cavallini C., Cavazzana R., Cordaro L., Cruz N., Palma M. D., Dan M., De Lorenzi A., Delogu R., De Muri M., Denizeau S., Fadone M., Fellin F., Ferro A., Gaio E., Gasparini F., Gasparrini C., Gnesotto F., Jain P., Krastev P., Lopez-Bruna D., Lorenzini R., Maistrello A., Manduchi G., Manfrin S., Marconato N., Martines E., Martini G., Martini S., Milazzo R., Patton T., Pavei M., Peruzzo S., Pilan N., Pimazzoni A., Poggi C., Pomaro N., Pouradier-Duteil B., Recchia M., Rigoni-Garola A., Rizzolo A., Sartori E., Shepherd A., Siragusa M., Sonato P., Sottocornola A., Spada E., Spagnolo S., Spolaore M., Taliercio C., Terranova D., Tinti P., Tomsic P., Trevisan L., Ugoletti M., Valente M., Vignando M., Zagorski R., Zamengo A., Zaniol B., Zaupa M., Zuin M., Cavenago M., Boilson D., Rotti C., Veltri P., Decamps H., Dremel M., Graceffa J., Geli F., Urbani M., Zacks J., Bonicelli T., Paolucci F., Garbuglia A., Agarici G., Gomez G., Gutierrez D., Kouzmenko G., Labate C., Masiello A., Mico G., Moreno J. -F., Pilard V., Rousseau A., Simon M., Kashiwagi M., Tobari H., Watanabe K., Maejima T., Kojima A., Oshita E., Yamashita Y., Konno S., Singh M., Chakraborty A., Patel H., Singh N. P., Fantz U., Bonomo F., Cristofaro S., Heinemann B., Kraus W., Wimmer C., Wunderlich D., Fubiani G., Tsumori K., Croci G., Gorini G., McCormack O., Muraro A., Rebai M., Tardocchi M., Giacomelli L., Rigamonti D., Taccogna F., Bruno D., Rutigliano M., D'Arienzo M., Tonti A., and Panin F.

Abstract

To reach fusion conditions and control the plasma configuration in ITER, the next step in tokamak fusion research, two neutral beam injectors (NBIs) will supply 16.5 MW each, by neutralizing accelerated negative hydrogen or deuterium ions. The requirements of ITER NBIs (40A/1 MeV D- ions for ≤1 h, 46A/870 keV H- ions for ≤1000 s) have never been simultaneously attained. So in the Neutral Beam Test Facility (NBTF, Consorzio RFX, Italy) the operation of the full-scale ITER NBI prototype (MITICA) will be tested and optimised up to full performances, focussing on accelerator (including voltage holding), beam optics, neutralisation, residual ion removal. The NBTF includes also the full-scale prototype of the ITER NBI source with 100 keV particle energy (SPIDER), for early investigation of: negative ion production and extraction, source uniformity, negative ion current density and beam optics. This paper will describe the main results of the first two years of SPIDER operation, devoted to characterizing plasma and beam parameters, including investigation of RF-plasma coupling efficiency and magnetic filter field effectiveness in reducing co-extracted electrons. SPIDER is progressing towards the first caesium injection, which aims at increasing the negative ion density. A major shutdown, planned for 2021, to solve the issues identified during the operation and to carry out programmed modifications, will be outlined. The installation of each MITICA power supply and auxiliary system is completed; in-vessel mechanical components are under procurement by Fusion for Energy (F4E). Integration, commissioning and test of the power supplies, procured by F4E and QST, as the Japanese Domestic Agency (JADA), will be presented. In particular, 1.0MV insulating tests were carried out step-by-step and successfully completed. In 2020 integrated tests of the power supplies on the accelerator dummy load started, including the assessment of their resilience to accelerator grid breakdowns usin

Published
2021

6. Progress in the ITER neutral beam test facility

Author

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., 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, 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.

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

8. First operation in SPIDER and the path to complete MITICA

Author

Serianni, G., primary, Toigo, V., additional, Bigi, M., additional, Boldrin, M., additional, Chitarin, G., additional, Dal Bello, S., additional, Grando, L., additional, Luchetta, A., additional, Marcuzzi, D., additional, Pasqualotto, R., additional, Pomaro, N., 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, Canton, A., additional, Cavazzana, R., additional, Dalla Palma, M., additional, Dan, M., additional, Delogu, R., additional, De Lorenzi, A., additional, De Muri, M., additional, Denizeau, S., additional, Fadone, M., additional, Fellin, F., additional, Ferro, 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, Patton, T., additional, Pavei, M., additional, Peruzzo, S., additional, Pilan, N., additional, Pimazzoni, A., additional, Piovan, R., additional, Poggi, C., additional, Recchia, M., additional, Rigoni, A., additional, Rizzolo, A., additional, Rostagni, G., additional, Sartori, E., additional, Siragusa, M., additional, Sonato, P., 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, Cavenago, 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, Chakraborty, A., additional, Baruah, U., additional, Patel, H., additional, Singh, N. P., additional, Patel, A., additional, Dhola, H., additional, Raval, B., additional, Cristofaro, S., additional, Fantz, U., additional, Heinemann, B., additional, Kraus, W., additional, Kashiwagi, M., additional, and Tobari, H., additional

Published
2020
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9. Progress in the ITER Neutral Beam Test Facility

Author

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., 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., Maejiama T., Kojima A., Umeda N., Sasaki S., Chakraborty A., Baruah U., Patel H., Singh N.P., Patel A., Dhola H., Raval B., Gutpa 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
MITICA, ITER Neutral Beam Test Facility, SPIDER
Abstract

The ITER Heating Neutral Beam (HNB) injectors, one of the tools necessary both to achieve burning conditions and to control plasma instabilities, are characterized by such demanding parameters as to require the construction of a Neutral Beam Test Facility (NBTF) dedicated to their development and optimization. The NBTF was realized in Padua (Italy), with the direct contribution of the Italian government, through the Consorzio RFX as the host entity, IO, the in kind contributions of three Domestic Agencies (F4E, JADA, INDA) and the technical and scientific support of various European laboratories and universities. The NBTF hosts two experiments: SPIDER and MITICA. The former is devoted to the optimization of the HNB and DNB ion sources and to the achievement of the required source performances. MITICA is the full size prototype of the ITER HNB, with an ion source identical to the one used in SPIDER. This paper gives an overview of the progress of the NBTF realization with particular emphasis on issues discovered during this phase of activities and to the adopted solutions in order to minimize the impact on the schedule while maintaining the goals of the facilities. The realization of MITICA is well advanced; it is expected to enter into operation in 2023 due to the long procurement times of the in-vessel mechanical components. The power supply designed to operate at 1MV are in an advanced phase of realization; all the high voltage components have been installed and the complex insulation test phase has begun in 2018. The construction and installation of SPIDER plant systems was successfully completed with their integration into the facility. The mechanical components of the ion source were installed inside the vessel and connected to the plants. The integrated commissioning with control (CODAS), protection and safety systems ended positively and the first experimental phase began. Finally, the first results of the SPIDER experimentation and of the 1MV insulation tests on the MITICA high voltage components are presented.

Published
2018

10. 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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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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17. Lessons learned after three years of SPIDER operation and the first MITICA integrated tests

Author

D. Marcuzzi, V. Toigo, M. Boldrin, G. Chitarin, S. Dal Bello, L. Grando, A. Luchetta, R. Pasqualotto, M. Pavei, G. Serianni, L. Zanotto, R. Agnello, P. Agostinetti, M. Agostini, D. Aprile, M. Barbisan, M. Battistella, G. Berton, M. Bigi, M. Brombin, V. Candela, V. Candeloro, A. Canton, R. Casagrande, C. Cavallini, R. Cavazzana, L. Cordaro, N. Cruz, M. Dalla Palma, M. Dan, A. De Lorenzi, R. Delogu, M. De Muri, M. De Nardi, S. Denizeau, M. Fadone, F. Fellin, A. Ferro, E. Gaio, C. Gasparrini, F. Gnesotto, P. Jain, A. La Rosa, D. Lopez-Bruna, R. Lorenzini, A. Maistrello, G. Manduchi, S. Manfrin, N. Marconato, I. Mario, G. Martini, R. Milazzo, T. Patton, S. Peruzzo, N. Pilan, A. Pimazzoni, C. Poggi, N. Pomaro, B. Pouradier-Duteil, M. Recchia, A. Rigoni-Garola, D. Rizzetto, A. Rizzolo, F. Santoro, E. Sartori, B. Segalini, A. Shepherd, M. Siragusa, P. Sonato, A. Sottocornola, E. Spada, S. Spagnolo, M. Spolaore, C. Taliercio, P. Tinti, P. Tomsič, L. Trevisan, M. Ugoletti, M. Valente, M. Valisa, F. Veronese, M. Vignando, P. Zaccaria, R. Zagorski, B. Zaniol, M. Zaupa, M. Zuin, M. Cavenago, D. Boilson, C. Rotti, H. Decamps, F. Geli, A. Sharma, P. Veltri, J. Zacks, M. Simon, F. Paolucci, A. Garbuglia, D. Gutierrez, A. Masiello, G. Mico, C. Labate, P. Readman, E. Bragulat, L. Bailly-Maitre, G. Gomez, G. Kouzmenko, F. Albajar, M. Kashiwagi, H. Tobari, A. Kojima, M. Murayama, S. Hatakeyama, E. Oshita, T. Maejima, N. Shibata, Y. Yamashita, K. Watanabe, N.P. Singh, M.J. Singh, H. Dhola, U. Fantz, B. Heinemann, C. Wimmer, D. Wünderlich, K. Tsumori, G. Croci, G. Gorini, A. Muraro, M. Rebai, M. Tardocchi, L. Giacomelli, D. Rigamonti, F. Taccogna, D. Bruno, M. Rutigliano, S. Longo, S. Deambrosis, E. Miorin, F. Montagner, A. Tonti, F. Panin, Marcuzzi, D, Toigo, V, Boldrin, M, Chitarin, G, Dal Bello, S, Grando, L, Luchetta, A, Pasqualotto, R, Pavei, M, Serianni, G, Zanotto, L, Agnello, R, Agostinetti, P, Agostini, M, Aprile, D, Barbisan, M, Battistella, M, Berton, G, Bigi, M, Brombin, M, Candela, V, Candeloro, V, Canton, A, Casagrande, R, Cavallini, C, Cavazzana, R, Cordaro, L, Cruz, N, Dalla Palma, M, Dan, M, De Lorenzi, A, Delogu, R, De Muri, M, De Nardi, M, Denizeau, S, Fadone, M, Fellin, F, Ferro, A, Gaio, E, Gasparrini, C, Gnesotto, F, Jain, P, La Rosa, A, Lopez-Bruna, D, Lorenzini, R, Maistrello, A, Manduchi, G, Manfrin, S, Marconato, N, Mario, I, Martini, G, Milazzo, R, Patton, T, Peruzzo, S, Pilan, N, Pimazzoni, A, Poggi, C, Pomaro, N, Pouradier-Duteil, B, Recchia, M, Rigoni-Garola, A, Rizzetto, D, Rizzolo, A, Santoro, F, Sartori, E, Segalini, B, Shepherd, A, Siragusa, M, Sonato, P, Sottocornola, A, Spada, E, Spagnolo, S, Spolaore, M, Taliercio, C, Tinti, P, Tomsic, P, Trevisan, L, Ugoletti, M, Valente, M, Valisa, M, Veronese, F, Vignando, M, Zaccaria, P, Zagorski, R, Zaniol, B, Zaupa, M, Zuin, M, Cavenago, M, Boilson, D, Rotti, C, Decamps, H, Geli, F, Sharma, A, Veltri, P, Zacks, J, Simon, M, Paolucci, F, Garbuglia, A, Gutierrez, D, Masiello, A, Mico, G, Labate, C, Readman, P, Bragulat, E, Bailly-Maitre, L, Gomez, G, Kouzmenko, G, Albajar, F, Kashiwagi, M, Tobari, H, Kojima, A, Murayama, M, Hatakeyama, S, Oshita, E, Maejima, T, Shibata, N, Yamashita, Y, Watanabe, K, Singh, N, Singh, M, Dhola, H, Fantz, U, Heinemann, B, Wimmer, C, Wunderlich, D, Tsumori, K, Croci, G, Gorini, G, Muraro, A, Rebai, M, Tardocchi, M, Giacomelli, L, Rigamonti, D, Taccogna, F, Bruno, D, Rutigliano, M, Longo, S, Deambrosis, S, Miorin, E, Montagner, F, Tonti, A, and Panin, F

Subjects
Accelerator Physics (physics.acc-ph), iter, Mechanical Engineering, FOS: Physical sciences, nbtf, neutral beam injector, mitica, Physics - Plasma Physics, Plasma Physics (physics.plasm-ph), Nuclear Energy and Engineering, Physics - Accelerator Physics, General Materials Science, spider, Civil and Structural Engineering
Abstract

ITER envisages the use of two heating neutral beam injectors plus an optional one as part of the auxiliary heating and current drive system, to reach the desired performances during its various phases of operation. The 16.5 MW expected neutral beam power per injector is several notches higher than worldwide existing facilities.In order to enable such development, a Neutral Beam Test Facility (NBTF) was established at Consorzio RFX, exploiting the synergy of two test beds, called SPIDER and MITICA. SPIDER is dedicated developing and char-acterizing large efficient negative ion sources at relevant parameters in ITER-like conditions: source and accel-erator located in the same vacuum where the beam propagates, immunity to electromagnetic interferences of multiple radio-frequency (RF) antennas, avoidance of RF-induced discharges on the outside of the source. Three years of experiments on SPIDER have addressed to the necessary design modifications to enable full perfor-mances. The source is presently under a long shut-down phase to incorporate learnings from the experimental campaign, in particular events/issues occurred during operation, which led to the identification of improvement opportunities/necessities (e.g. RF discharges, local burns, water leaks, other damages, configuration/design upgrades to maximize chances/margin to quest target parameters).Parallelly, developments on MITICA, the full-scale prototype of the ITER Neutral Beam Injector (NBI) featuring a 1 MV accelerator and ion neutralization, are underway including manufacturing of the beam source, accel-erator and the beam line components, while power supplies and auxiliary plants, already installed, are under final testing and commissioning.Integration, commissioning and tests of the 1 MV power supplies are essential for this first-of-kind system, unparalleled both in research and industry field. 1.2 MV dc insulating tests of high voltage components were successfully completed. The integrated test to confirm 1 MV output by combining invertor systems, DC gener-ators and transmission lines extracted errors/accidents in some components. To realize a concrete system for ITER, said events have been addressed and solutions for the repair and the improvement of the system were developed.Hence, NBTF is emerging as a necessary facility, due to the large gap with existing injectors, effectively dedicated to identify issues and find solutions to enable successful ITER NBI operations in a time bound fashion. The lessons learned during the implementation on NBTF and future perspectives are here discussed.

Published
2023

18. On the road to ITER NBIs: SPIDER improvement after first operation and MITICA construction progress

Author

M. Tardocchi, G. Mico, Hitesh Patel, V. Antoni, A. Garbuglia, A. Masiello, Emanuele Sartori, L. Giacomelli, M. Brombin, F. Geli, A. De Lorenzi, Pierluigi Veltri, Piero Agostinetti, Gabriele Manduchi, S. Cristofaro, T. Maejima, D. Bruno, F. Paolucci, Marica Rebai, L. Cordaro, M. Zaupa, B. Pouradier-Duteil, S. Denizeau, M. Vignando, R. Lorenzini, Y. Yamashita, M. Dan, R. Casagrande, D. Lopez-Bruna, Federica Bonomo, R. Zagorski, M. Siragusa, M. Zuin, A. Rigoni-Garola, V. Candeloro, Daniel Gutierrez, H. Decamps, C. Taliercio, Loris Zanotto, F. Fellin, C. Rotti, M. Fadone, R. Delogu, M. Valente, M. Bigi, A. Canton, Gabriele Croci, R. Agnello, A. Pimazzoni, Bernd Heinemann, Emilio Martines, O. McCormack, M. Dalla Palma, Kazuhiro Watanabe, J. Graceffa, Nicola Pilan, Simone Peruzzo, Vanni Toigo, E. Oshita, A. Rizzolo, Elena Gaio, D. Aprile, M. Dremel, M. De Muri, B. Zaniol, R. Milazzo, C. Cavallini, Silvia Spagnolo, Gianluigi Serianni, N. Cruz, A. Sottocornola, Claudia Gasparrini, Hiroyuki Tobari, L. Trevisan, Namita Singh, P. Tomsic, T. Patton, F. Gasparini, F. Taccogna, Diego Marcuzzi, Atsushi Kojima, E. Spada, A. Muraro, Ursel Fantz, M. Pavei, A.K. Chakraborty, Francesco Gnesotto, A. Ferro, S. Konno, Tullio Bonicelli, Roberto Cavazzana, Giuseppe Chitarin, Nicolò Marconato, Giuseppe Gorini, Adriano Luchetta, A. Maistrello, A. Zamengo, C. Poggi, Marco D’Arienzo, N. Pomaro, F. Panin, A. Rousseau, Monica Spolaore, G. Berton, J.F. Moreno, W. Kraus, S. Dal Bello, M. Battistella, P. Tinti, G. Kouzmenko, D. Boilson, Piergiorgio Sonato, Marco Cavenago, C. Wimmer, M. J. Singh, M. Rutigliano, P. Jain, Pierluigi Zaccaria, M. Ugoletti, Marco Boldrin, D. Rigamonti, Katsuyoshi Tsumori, S. Manfrin, D. Wünderlich, Gwenael Fubiani, Muriel Simon, G. Martini, G. Agarici, Mieko Kashiwagi, D. Terranova, Marco Barbisan, S. Martini, M. Urbani, Luca Grando, Roberto Pasqualotto, J. Zacks, A. Tonti, M. Recchia, C. Labate, Matteo Agostini, P.B. Krastev, V. Pilard, G. Gomez, A. Shepherd, Toigo, V, Marcuzzi, D, Serianni, G, Boldrin, M, Chitarin, G, Bello, S, Grando, L, Luchetta, A, Pasqualotto, R, Zaccaria, P, Zanotto, L, Agnello, R, Agostinetti, P, Agostini, M, Antoni, V, Aprile, D, Barbisan, M, Battistella, M, Berton, G, Bigi, M, Brombin, M, Candeloro, V, Canton, A, Casagrande, R, Cavallini, C, Cavazzana, R, Cordaro, L, Cruz, N, Palma, M, Dan, M, De Lorenzi, A, Delogu, R, De Muri, M, Denizeau, S, Fadone, M, Fellin, F, Ferro, A, Gaio, E, Gasparini, F, Gasparrini, C, Gnesotto, F, Jain, P, Krastev, P, Lopez-Bruna, D, Lorenzini, R, Maistrello, A, Manduchi, G, Manfrin, S, Marconato, N, Martines, E, Martini, G, Martini, S, Milazzo, R, Patton, T, Pavei, M, Peruzzo, S, Pilan, N, Pimazzoni, A, Poggi, C, Pomaro, N, Pouradier-Duteil, B, Recchia, M, Rigoni-Garola, A, Rizzolo, A, Sartori, E, Shepherd, A, Siragusa, M, Sonato, P, Sottocornola, A, Spada, E, Spagnolo, S, Spolaore, M, Taliercio, C, Terranova, D, Tinti, P, Tomsic, P, Trevisan, L, Ugoletti, M, Valente, M, Vignando, M, Zagorski, R, Zamengo, A, Zaniol, B, Zaupa, M, Zuin, M, Cavenago, M, Boilson, D, Rotti, C, Veltri, P, Decamps, H, Dremel, M, Graceffa, J, Geli, F, Urbani, M, Zacks, J, Bonicelli, T, Paolucci, F, Garbuglia, A, Agarici, G, Gomez, G, Gutierrez, D, Kouzmenko, G, Labate, C, Masiello, A, Mico, G, Moreno, J, Pilard, V, Rousseau, A, Simon, M, Kashiwagi, M, Tobari, H, Watanabe, K, Maejima, T, Kojima, A, Oshita, E, Yamashita, Y, Konno, S, Singh, M, Chakraborty, A, Patel, H, Singh, N, Fantz, U, Bonomo, F, Cristofaro, S, Heinemann, B, Kraus, W, Wimmer, C, Wunderlich, D, Fubiani, G, Tsumori, K, Croci, G, Gorini, G, Mccormack, O, Muraro, A, Rebai, M, Tardocchi, M, Giacomelli, L, Rigamonti, D, Taccogna, F, Bruno, D, Rutigliano, M, D'Arienzo, M, Tonti, A, and Panin, F

Subjects
Tokamak, Nuclear engineering, design, 7. Clean energy, 01 natural sciences, negative ion source, 010305 fluids & plasmas, law.invention, ITER neutral beam injector, ITER neutral beam injectors, Negative ion beam, Negative ion source, law, iter neutral beam injectors, 0103 physical sciences, General Materials Science, 010306 general physics, Civil and Structural Engineering, Dummy load, Magnetic filter, negative ion beam, Mechanical Engineering, Injector, Beam optics, Power (physics), Nuclear Energy and Engineering, Environmental science, Beam (structure), Voltage
Abstract

To reach fusion conditions and control the plasma configuration in ITER, the next step in tokamak fusion research, two neutral beam injectors (NBIs) will supply 16.5 MW each, by neutralizing accelerated negative hydrogen or deuterium ions. The requirements of ITER NBIs (40A/1 MeV D- ions for ≤1 h, 46A/870 keV H- ions for ≤1000 s) have never been simultaneously attained. So in the Neutral Beam Test Facility (NBTF, Consorzio RFX, Italy) the operation of the full-scale ITER NBI prototype (MITICA) will be tested and optimised up to full performances, focussing on accelerator (including voltage holding), beam optics, neutralisation, residual ion removal. The NBTF includes also the full-scale prototype of the ITER NBI source with 100 keV particle energy (SPIDER), for early investigation of: negative ion production and extraction, source uniformity, negative ion current density and beam optics. This paper will describe the main results of the first two years of SPIDER operation, devoted to characterizing plasma and beam parameters, including investigation of RF-plasma coupling efficiency and magnetic filter field effectiveness in reducing co-extracted electrons. SPIDER is progressing towards the first caesium injection, which aims at increasing the negative ion density. A major shutdown, planned for 2021, to solve the issues identified during the operation and to carry out programmed modifications, will be outlined. The installation of each MITICA power supply and auxiliary system is completed; in-vessel mechanical components are under procurement by Fusion for Energy (F4E). Integration, commissioning and test of the power supplies, procured by F4E and QST, as the Japanese Domestic Agency (JADA), will be presented. In particular, 1.0MV insulating tests were carried out step-by-step and successfully completed. In 2020 integrated tests of the power supplies on the accelerator dummy load started, including the assessment of their resilience to accelerator grid breakdowns using a short-circuit device located in vacuum. The aggressive programme, to validate the NBI design at NBTF and to meet ITER schedule (requiring NBIs in operation in 2032), will be outlined. Unfortunately, in 2020 the coronavirus disease infection affected the NBTF activities. A solution to proceed with integrated power tests despite the coronavirus is presented.

Published
2021

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