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8 results on '"Cester, D"'

1. Current sheet fragmentation following magnetic reconnection in RFP plasmas

Author

Poedts, S, Fajardo, M, Giruzzi, G, Gans, T, Vennekens, N, Mantica, P, Cordaro, L, Zuin, M, Momo, B, Martines, E, Spolaore, M, Auriemma, F, Cavazzana, R, De Masi, G, Scarin, P, Spagnolo, S, Vianello, N, Cester, D, Stevanato, L, Isliker, H, Vlahos, L, Schneider, W, Cordaro L, Zuin M, Momo B, Martines E, Spolaore M, Auriemma F, Cavazzana R, De Masi G, Scarin P, Spagnolo S, Vianello N, Cester D, Stevanato L, Isliker H, Vlahos L, Schneider W, Poedts, S, Fajardo, M, Giruzzi, G, Gans, T, Vennekens, N, Mantica, P, Cordaro, L, Zuin, M, Momo, B, Martines, E, Spolaore, M, Auriemma, F, Cavazzana, R, De Masi, G, Scarin, P, Spagnolo, S, Vianello, N, Cester, D, Stevanato, L, Isliker, H, Vlahos, L, Schneider, W, Cordaro L, Zuin M, Momo B, Martines E, Spolaore M, Auriemma F, Cavazzana R, De Masi G, Scarin P, Spagnolo S, Vianello N, Cester D, Stevanato L, Isliker H, Vlahos L, and Schneider W

Published
2016

2. Current sheet fragmentation following magnetic reconnection in RFP plasmas

Author

Poedts, S, Fajardo, M, Giruzzi, G, Gans, T, Vennekens, N, Mantica, P, Cordaro, L, Zuin, M, Momo, B, Martines, E, Spolaore, M, Auriemma, F, Cavazzana, R, De Masi, G, Scarin, P, Spagnolo, S, Vianello, N, Cester, D, Stevanato, L, Isliker, H, Vlahos, L, Schneider, W, Cordaro L, Zuin M, Momo B, Martines E, Spolaore M, Auriemma F, Cavazzana R, De Masi G, Scarin P, Spagnolo S, Vianello N, Cester D, Stevanato L, Isliker H, Vlahos L, Schneider W, Poedts, S, Fajardo, M, Giruzzi, G, Gans, T, Vennekens, N, Mantica, P, Cordaro, L, Zuin, M, Momo, B, Martines, E, Spolaore, M, Auriemma, F, Cavazzana, R, De Masi, G, Scarin, P, Spagnolo, S, Vianello, N, Cester, D, Stevanato, L, Isliker, H, Vlahos, L, Schneider, W, Cordaro L, Zuin M, Momo B, Martines E, Spolaore M, Auriemma F, Cavazzana R, De Masi G, Scarin P, Spagnolo S, Vianello N, Cester D, Stevanato L, Isliker H, Vlahos L, and Schneider W

Published
2016

3. Characterization of particle dynamics and magnetic reconnection in the RFX-mod plasmas

Author

Bingham, R, Goncalves, B, Suttrop, W, Foest, R, Silva, C, Coelho, R, McClements, K, Atzeni, S, Zuin, M, Stevanato, L, Martines, E, Auriemma, F, Momo, B, Cavazzana, R, De Masi, G, Gonzalez, W, Lorenzini, R, Scarin, P, Spagnolo, S, Spolaore, M, Vianello, N, Schneider, W, Cester, D, Nebbia, G, Sajo-Bohus, L, Viesti, G, Zuin M, Stevanato L, Martines E, Auriemma F, Momo B, Cavazzana R, De Masi G, Gonzalez W, Lorenzini R, Scarin P, Spagnolo S, Spolaore M, Vianello N, Schneider W, Cester D, Nebbia G, Sajo-Bohus L, Viesti G, Bingham, R, Goncalves, B, Suttrop, W, Foest, R, Silva, C, Coelho, R, McClements, K, Atzeni, S, Zuin, M, Stevanato, L, Martines, E, Auriemma, F, Momo, B, Cavazzana, R, De Masi, G, Gonzalez, W, Lorenzini, R, Scarin, P, Spagnolo, S, Spolaore, M, Vianello, N, Schneider, W, Cester, D, Nebbia, G, Sajo-Bohus, L, Viesti, G, Zuin M, Stevanato L, Martines E, Auriemma F, Momo B, Cavazzana R, De Masi G, Gonzalez W, Lorenzini R, Scarin P, Spagnolo S, Spolaore M, Vianello N, Schneider W, Cester D, Nebbia G, Sajo-Bohus L, and Viesti G

Published
2015

4. Characterization of particle dynamics and magnetic reconnection in the RFX-mod plasmas

Author

Bingham, R, Goncalves, B, Suttrop, W, Foest, R, Silva, C, Coelho, R, McClements, K, Atzeni, S, Zuin, M, Stevanato, L, Martines, E, Auriemma, F, Momo, B, Cavazzana, R, De Masi, G, Gonzalez, W, Lorenzini, R, Scarin, P, Spagnolo, S, Spolaore, M, Vianello, N, Schneider, W, Cester, D, Nebbia, G, Sajo-Bohus, L, Viesti, G, Zuin M, Stevanato L, Martines E, Auriemma F, Momo B, Cavazzana R, De Masi G, Gonzalez W, Lorenzini R, Scarin P, Spagnolo S, Spolaore M, Vianello N, Schneider W, Cester D, Nebbia G, Sajo-Bohus L, Viesti G, Bingham, R, Goncalves, B, Suttrop, W, Foest, R, Silva, C, Coelho, R, McClements, K, Atzeni, S, Zuin, M, Stevanato, L, Martines, E, Auriemma, F, Momo, B, Cavazzana, R, De Masi, G, Gonzalez, W, Lorenzini, R, Scarin, P, Spagnolo, S, Spolaore, M, Vianello, N, Schneider, W, Cester, D, Nebbia, G, Sajo-Bohus, L, Viesti, G, Zuin M, Stevanato L, Martines E, Auriemma F, Momo B, Cavazzana R, De Masi G, Gonzalez W, Lorenzini R, Scarin P, Spagnolo S, Spolaore M, Vianello N, Schneider W, Cester D, Nebbia G, Sajo-Bohus L, and Viesti G

Published
2015

5. Overview of the RFX-mod contribution to the international Fusion Science Program

Author

Puiatti, M, Dal Bello, S, Marrelli, L, Martin, P, Agostinetti, P, Agostini, M, Antoni, V, Auriemma, F, Barbisan, M, Barbui, T, Baruzzo, M, Battistella, M, Belli, F, Bettini, P, Bigi, M, Bilel, R, Boldrin, M, Bolzonella, T, Bonfiglio, D, Brombin, M, Buffa, A, Canton, A, Cappello, S, Carraro, L, Cavazzana, R, Cester, D, Chacon, L, Chapman, B, Chitarin, G, Ciaccio, G, Cooper, W, Dalla Palma, M, Deambrosis, S, Delogu, R, De Lorenzi, A, De Masi, G, Dong, J, Escande, D, Esposito, B, Fassina, A, Fellin, F, Ferro, A, Finotti, C, Franz, P, Frassinetti, L, Palumbo, M, Gaio, E, Ghezzi, F, Giudicotti, L, Gnesotto, F, Gobbin, M, Gonzales, W, Grando, L, Guo, S, Hanson, J, Hirshman, S, Innocente, P, Jackson, J, Kiyama, S, Komm, M, Laguardia, L, Li, C, Liu, S, Liu, Y, Lorenzini, R, Luce, T, Luchetta, A, Maistrello, A, Manduchi, G, Mansfield, D, Marchiori, G, Marconato, N, Marocco, D, Marcuzzi, D, Martines, E, Martini, S, Matsunaga, G, Mazzitelli, G, Miorin, E, Momo, B, Moresco, M, Okabayashi, M, Olofsson, E, Paccagnella, R, Patel, N, Pavei, M, Peruzzo, S, Pilan, N, Pigatto, L, Piovan, R, Piovesan, P, Piron, C, Piron, L, Predebon, I, Rea, C, Recchia, M, Rigato, V, Rizzolo, A, Roquemore, A, Rostagni, G, Ruset, C, Ruzzon, A, Sajo-Bohus, L, Sakakita, H, Sanchez, R, Sarff, J, Sartori, E, Sattin, F, Scaggion, A, Scarin, P, Schmitz, O, Sonato, P, Spada, E, Spagnolo, S, Spolaore, M, Spong, D, Spizzo, G, Stevanato, L, Takechi, M, Taliercio, C, Terranova, D, Trevisan, G, Urso, G, Valente, M, Valisa, M, Veranda, M, Vianello, N, Viesti, G, Villone, F, Vincenzi, P, Visona', N, Wang, Z, White, R, Xanthopoulos, P, Xu, X, Yanovskiy, V, Zamengo, A, Zanca, P, Zaniol, B, Zanotto, L, Zilli, E, Zuin, M, Puiatti M E, Dal Bello S, Marrelli L, Martin P, Agostinetti P, Agostini M, Antoni V, Auriemma F, Barbisan M, Barbui T, Baruzzo M, Battistella M, Belli F, Bettini P, Bigi M, Bilel R, Boldrin M, Bolzonella T, Bonfiglio D, Brombin M, Buffa A, Canton A, Cappello S, Carraro L, Cavazzana R, Cester D, Chacon L, Chapman B E, Chitarin G, Ciaccio G, Cooper W A, Dalla Palma M, Deambrosis S, Delogu R, De Lorenzi A, De Masi G, Dong J Q, Escande D F, Esposito B, Fassina A, Fellin F, Ferro A, Finotti C, Franz P, Frassinetti L, Palumbo M Furno, Gaio E, Ghezzi F, Giudicotti L, Gnesotto F, Gobbin M, Gonzales W A, Grando L, Guo S C, Hanson J D, Hirshman S P, Innocente P, Jackson J L, Kiyama S, Komm M, Laguardia L, Li C, Liu S F, Liu Y Q, Lorenzini R, Luce T C, Luchetta A, Maistrello A, Manduchi G, Mansfield D K, Marchiori G, Marconato N, Marocco D, Marcuzzi D, Martines E, Martini S, Matsunaga G, Mazzitelli G, Miorin E, Momo B, Moresco M, Okabayashi M, Olofsson E, Paccagnella R, Patel N, Pavei M, Peruzzo S, Pilan N, Pigatto L, Piovan R, Piovesan P, Piron C, Piron L, Predebon I, Rea C, Recchia M, Rigato V, Rizzolo A, Roquemore A L, Rostagni G, Ruset C, Ruzzon A, Sajo-Bohus L, Sakakita H, Sanchez R, Sarff J S, Sartori E, Sattin F, Scaggion A, Scarin P, Schmitz O, Sonato P, Spada E, Spagnolo S, Spolaore M, Spong D A, Spizzo G, Stevanato L, Takechi M, Taliercio C, Terranova D, Trevisan G L, Urso G, Valente M, Valisa M, Veranda M, Vianello N, Viesti G, Villone F, Vincenzi P, Visona' N, Wang Z R, White R B, Xanthopoulos P, Xu X Y, Yanovskiy V, Zamengo A, Zanca P, Zaniol B, Zanotto L, Zilli E, Zuin M, Puiatti, M, Dal Bello, S, Marrelli, L, Martin, P, Agostinetti, P, Agostini, M, Antoni, V, Auriemma, F, Barbisan, M, Barbui, T, Baruzzo, M, Battistella, M, Belli, F, Bettini, P, Bigi, M, Bilel, R, Boldrin, M, Bolzonella, T, Bonfiglio, D, Brombin, M, Buffa, A, Canton, A, Cappello, S, Carraro, L, Cavazzana, R, Cester, D, Chacon, L, Chapman, B, Chitarin, G, Ciaccio, G, Cooper, W, Dalla Palma, M, Deambrosis, S, Delogu, R, De Lorenzi, A, De Masi, G, Dong, J, Escande, D, Esposito, B, Fassina, A, Fellin, F, Ferro, A, Finotti, C, Franz, P, Frassinetti, L, Palumbo, M, Gaio, E, Ghezzi, F, Giudicotti, L, Gnesotto, F, Gobbin, M, Gonzales, W, Grando, L, Guo, S, Hanson, J, Hirshman, S, Innocente, P, Jackson, J, Kiyama, S, Komm, M, Laguardia, L, Li, C, Liu, S, Liu, Y, Lorenzini, R, Luce, T, Luchetta, A, Maistrello, A, Manduchi, G, Mansfield, D, Marchiori, G, Marconato, N, Marocco, D, Marcuzzi, D, Martines, E, Martini, S, Matsunaga, G, Mazzitelli, G, Miorin, E, Momo, B, Moresco, M, Okabayashi, M, Olofsson, E, Paccagnella, R, Patel, N, Pavei, M, Peruzzo, S, Pilan, N, Pigatto, L, Piovan, R, Piovesan, P, Piron, C, Piron, L, Predebon, I, Rea, C, Recchia, M, Rigato, V, Rizzolo, A, Roquemore, A, Rostagni, G, Ruset, C, Ruzzon, A, Sajo-Bohus, L, Sakakita, H, Sanchez, R, Sarff, J, Sartori, E, Sattin, F, Scaggion, A, Scarin, P, Schmitz, O, Sonato, P, Spada, E, Spagnolo, S, Spolaore, M, Spong, D, Spizzo, G, Stevanato, L, Takechi, M, Taliercio, C, Terranova, D, Trevisan, G, Urso, G, Valente, M, Valisa, M, Veranda, M, Vianello, N, Viesti, G, Villone, F, Vincenzi, P, Visona', N, Wang, Z, White, R, Xanthopoulos, P, Xu, X, Yanovskiy, V, Zamengo, A, Zanca, P, Zaniol, B, Zanotto, L, Zilli, E, Zuin, M, Puiatti M E, Dal Bello S, Marrelli L, Martin P, Agostinetti P, Agostini M, Antoni V, Auriemma F, Barbisan M, Barbui T, Baruzzo M, Battistella M, Belli F, Bettini P, Bigi M, Bilel R, Boldrin M, Bolzonella T, Bonfiglio D, Brombin M, Buffa A, Canton A, Cappello S, Carraro L, Cavazzana R, Cester D, Chacon L, Chapman B E, Chitarin G, Ciaccio G, Cooper W A, Dalla Palma M, Deambrosis S, Delogu R, De Lorenzi A, De Masi G, Dong J Q, Escande D F, Esposito B, Fassina A, Fellin F, Ferro A, Finotti C, Franz P, Frassinetti L, Palumbo M Furno, Gaio E, Ghezzi F, Giudicotti L, Gnesotto F, Gobbin M, Gonzales W A, Grando L, Guo S C, Hanson J D, Hirshman S P, Innocente P, Jackson J L, Kiyama S, Komm M, Laguardia L, Li C, Liu S F, Liu Y Q, Lorenzini R, Luce T C, Luchetta A, Maistrello A, Manduchi G, Mansfield D K, Marchiori G, Marconato N, Marocco D, Marcuzzi D, Martines E, Martini S, Matsunaga G, Mazzitelli G, Miorin E, Momo B, Moresco M, Okabayashi M, Olofsson E, Paccagnella R, Patel N, Pavei M, Peruzzo S, Pilan N, Pigatto L, Piovan R, Piovesan P, Piron C, Piron L, Predebon I, Rea C, Recchia M, Rigato V, Rizzolo A, Roquemore A L, Rostagni G, Ruset C, Ruzzon A, Sajo-Bohus L, Sakakita H, Sanchez R, Sarff J S, Sartori E, Sattin F, Scaggion A, Scarin P, Schmitz O, Sonato P, Spada E, Spagnolo S, Spolaore M, Spong D A, Spizzo G, Stevanato L, Takechi M, Taliercio C, Terranova D, Trevisan G L, Urso G, Valente M, Valisa M, Veranda M, Vianello N, Viesti G, Villone F, Vincenzi P, Visona' N, Wang Z R, White R B, Xanthopoulos P, Xu X Y, Yanovskiy V, Zamengo A, Zanca P, Zaniol B, Zanotto L, Zilli E, and Zuin M

Abstract

The RFX-mod device is operated both as a reversed field pinch (RFP), where advanced regimes featuring helical shape develop, and as a tokamak. Due to its flexibility, RFX-mod is contributing to the solution of key issues in the roadmap to ITER and DEMO, including MHD instability control, internal transport barriers, edge transport and turbulence, isotopic effect, high density limit and three-dimensional (3D) non-linear MHD modelling. This paper reports recent advancements in the understanding of the self-organized helical states, featuring a strong electron transport barrier, in the RFP configuration; the physical mechanism driving the residual transport at the barrier has been investigated. Following the first experiments with deuterium as the filling gas, new results concerning the isotope effect in the RFP are discussed. Studies on the high density limit show that in the RFP it is related to a toroidal particle accumulation due to the onset of a convective cell. In the tokamak configuration, q(a) regimes down to q(a) = 1.2 have been pioneered, with (2,1) tearing mode (TM) mitigated and (2,1) resistive wall mode (RWM) stabilized: the control of such modes can be obtained both by poloidal and radial sensors. Progress has been made in the avoidance of disruptions due to the (2,1) TM by applying q(a) control, and on the general issue of error field control. The effect of externally applied 3D fields on plasma flow and edge turbulence, sawtooth control and runaway electron decorrelation has been analysed. The experimental program is supported by substantial theoretical activity: 3D non-linear visco-resistive MHD and non-local transport modelling have been advanced; RWMs have been studied by a toroidal MHD kinetic hybrid stability code.

Published
2015

6. Overview of the RFX-mod fusion science activity

Author

Zuin, M., Dal Bello, S., Marrelli, L., Puiatti, M. E., Agostinetti, P., Agostini, M., Antoni, V., Auriemma, F., Barbisan, M., Barbui, T., Baruzzo, M., Belli, F., Bettini, P., Bigi, M., Bilel, R., Boldrin, M., Bolzonella, T., Bonfiglio, D., Brombin, M., Buffa, A., Bustreo, C., Canton, A., Cappello, S., Carraro, L., Cavazzana, R., Cester, D., Chacon, L., Chitarin, G., Cooper, W. A., Cordaro, L., Palma, M. Dalla, Deambrosis, S., Delogu, R., De Lorenzi, A., De Masi, G., Dong, J. Q., Escande, D. F., Fassina, A., Felici, F., Ferro, A., Finotti, C., Franz, P., Frassinetti, Lorenzo, Gaio, E., Ghezzi, F., Giudicotti, L., Gnesotto, F., Gobbin, M., Gonzalez, W. A., Grando, L., Guo, S. C., Hanson, J. D., Hirshman, S. P., Innocente, P., Jackson, J. L., Kiyama, S., Komm, M., Kudlacek, O., Laguardia, L., Li, C., Liu, B., Liu, S. F., Liu, Y. Q., Lopez-Bruna, D., Lorenzini, R., Luce, T. C., Luchetta, A., Maistrello, A., Manduchi, G., Mansfield, D. K., Marchiori, G., Marconato, N., Marcuzzi, D., Martin, P., Martines, E., Martini, S., Mazzitelli, G., McCormack, O., Miorin, E., Momo, B., Moresco, M., Narushima, Y., Okabayashi, M., Paccagnella, R., Patel, N., Pavei, M., Peruzzo, S., Pilan, N., Pigatto, L., Piovan, R., Piovesan, P., Piron, C., Piron, L., Predebon, I., Pucella, G., Rea, C., Recchia, M., Rizzolo, A., Rostagni, G., Ruset, C., Sajo-Bohus, L., Sakakita, H., Sanchez, R., Sarff, J. S., Sattin, F., Scarin, P., Schmitz, O., Schneider, W., Siragusa, M., Sonato, P., Spada, E., Spagnolo, S., Spolaore, M., Spong, D. A., Spizzo, G., Stevanato, L., Suzuki, Y., Taliercio, C., Terranova, D., Tudisco, O., Urso, G., Valente, M., Valisa, M., Vallar, M., Veranda, M., Vianello, N., Villone, F., Vincenzi, P., Visona, N., White, R. B., Xanthopoulos, P., Xu, X. Y., Yanovskiy, V., Zamengo, A., Zanca, P., Zaniol, B., Zanotto, L., Zhang, Y., Zilli, E., Zuin, M., Dal Bello, S., Marrelli, L., Puiatti, M. E., Agostinetti, P., Agostini, M., Antoni, V., Auriemma, F., Barbisan, M., Barbui, T., Baruzzo, M., Belli, F., Bettini, P., Bigi, M., Bilel, R., Boldrin, M., Bolzonella, T., Bonfiglio, D., Brombin, M., Buffa, A., Bustreo, C., Canton, A., Cappello, S., Carraro, L., Cavazzana, R., Cester, D., Chacon, L., Chitarin, G., Cooper, W. A., Cordaro, L., Palma, M. Dalla, Deambrosis, S., Delogu, R., De Lorenzi, A., De Masi, G., Dong, J. Q., Escande, D. F., Fassina, A., Felici, F., Ferro, A., Finotti, C., Franz, P., Frassinetti, Lorenzo, Gaio, E., Ghezzi, F., Giudicotti, L., Gnesotto, F., Gobbin, M., Gonzalez, W. A., Grando, L., Guo, S. C., Hanson, J. D., Hirshman, S. P., Innocente, P., Jackson, J. L., Kiyama, S., Komm, M., Kudlacek, O., Laguardia, L., Li, C., Liu, B., Liu, S. F., Liu, Y. Q., Lopez-Bruna, D., Lorenzini, R., Luce, T. C., Luchetta, A., Maistrello, A., Manduchi, G., Mansfield, D. K., Marchiori, G., Marconato, N., Marcuzzi, D., Martin, P., Martines, E., Martini, S., Mazzitelli, G., McCormack, O., Miorin, E., Momo, B., Moresco, M., Narushima, Y., Okabayashi, M., Paccagnella, R., Patel, N., Pavei, M., Peruzzo, S., Pilan, N., Pigatto, L., Piovan, R., Piovesan, P., Piron, C., Piron, L., Predebon, I., Pucella, G., Rea, C., Recchia, M., Rizzolo, A., Rostagni, G., Ruset, C., Sajo-Bohus, L., Sakakita, H., Sanchez, R., Sarff, J. S., Sattin, F., Scarin, P., Schmitz, O., Schneider, W., Siragusa, M., Sonato, P., Spada, E., Spagnolo, S., Spolaore, M., Spong, D. A., Spizzo, G., Stevanato, L., Suzuki, Y., Taliercio, C., Terranova, D., Tudisco, O., Urso, G., Valente, M., Valisa, M., Vallar, M., Veranda, M., Vianello, N., Villone, F., Vincenzi, P., Visona, N., White, R. B., Xanthopoulos, P., Xu, X. Y., Yanovskiy, V., Zamengo, A., Zanca, P., Zaniol, B., Zanotto, L., Zhang, Y., and Zilli, E.

Abstract

This paper reports the main recent results of the RFX-mod fusion science activity. The RFX-mod device is characterized by a unique flexibility in terms of accessible magnetic configurations. Axisymmetric and helically shaped reversed-field pinch equilibria have been studied, along with tokamak plasmas in a wide range of q(a) regimes (spanning from 4 down to 1.2 values). The full range of magnetic configurations in between the two, the so-called ultra-low q ones, has been explored, with the aim of studying specific physical issues common to all equilibria, such as, for example, the density limit phenomenon. The powerful RFX-mod feedback control system has been exploited for MHD control, which allowed us to extend the range of experimental parameters, as well as to induce specific magnetic perturbations for the study of 3D effects. In particular, transport, edge and isotope effects in 3D equilibria have been investigated, along with runaway mitigations through induced magnetic perturbations. The first transitions to an improved confinement scenario in circular and D-shaped tokamak plasmas have been obtained thanks to an active modification of the edge electric field through a polarized electrode. The experiments are supported by intense modeling with 3D MHD, gyrokinetic, guiding center and transport codes. Proposed modifications to the RFX-mod device, which will enable further contributions to the solution of key issues in the roadmap to ITER and DEMO, are also briefly presented., QC 20170802

Published
2017
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7. Overview of the RFX-mod fusion science activity

Author

Zuin, M, DAL BELLO, S, Marrelli, L, Puiatti, M, Agostinetti, P, Agostini, M, Antoni, V, Auriemma, F, Barbisan, M, Barbui, T, Baruzzo, M, Belli, F, Bettini, P, Bigi, M, Bilel, R, Boldrin, M, Bolzonella, T, Bonfiglio, D, Brombin, M, Buffa, A, Bustreo, C, Canton, A, Cappello, S, Carraro, L, Cavazzana, R, Cester, D, Chacon, L, Chitarin, G, Cooper, W, Cordaro, L, DALLA PALMA, M, Deambrosis, S, Delogu, R, De Lorenzi, A, DE MASI, G, Dong, J, Escande, D, Fassina, A, Felici, F, Ferro, A, Finotti, C, Franz, P, Frassinetti, L, Gaio, E, Ghezzi, F, Giudicotti, L, Gnesotto, F, Gobbin, M, Gonzalez, W, Grando, L, Guo, S, Hanson, J, Hirshman, S, Innocente, P, Jackson, J, Kiyama, S, Komm, M, Kudlacek, O, Laguardia, A, Li, C, Liu, B, Liu, S, Liu, Y, López Bruna, D, Lorenzini, R, Luce, T, Luchetta, A, Maistrello, A, Manduchi, G, Mansfield, D, Marchiori, G, Marconato, N, Marcuzzi, D, Martin, P, Martines, E, Martini, S, Mazzitelli, G, Mccormack, O, Miorin, E, Momo, B, Moresco, M, Narushima, Y, Okabayashi, M, Paccagnella, R, Patel, N, Pavei, M, Peruzzo, S, Pilan, N, Pigatto, L, Piovan, R, Piovesan, P, Piron, C, Piron, L, Predebon, I, Pucella, G, Rea, C, Recchia, M, Rizzolo, A, Rostagni, G, Ruset, C, Sajò Bohus, L, Sakakita, H, Sanchez, R, Sarff, J, Sattin, F, Scarin, P, Schmitz, O, Schneider, W, Siragusa, M, Sonato, P, Spada, E, Spagnolo, S, Spolaore, M, Spong, D, Spizzo, G, Stevanato, L, Suzuki, Y, Taliercio, C, Terranova, D, Tudisco, O, Urso, G, Valente, M, Valisa, M, Vallar, M, Veranda, M, Vianello, N, Villone, F, Vincenzi, P, Visonà, N, White, R, Xanthopoulos, P, Xu, X, Yanovskiy, V, Zamengo, A, Zanca, P, Zaniol, B, Zanotto, L, Zhang, Y, Zilli, E, ZUIN, MATTEO, DAL BELLO, SILVIA, MARRELLI, LIONELLO, Puiatti, M. E., AGOSTINETTI, PIERO, AGOSTINI, MATTEO, ANTONI, VANNI, AURIEMMA, FULVIO, BARBISAN, MARCO, BARBUI, TULLIO, BARUZZO, MATTEO, Belli, F., BETTINI, PAOLO, Bigi, M., Bilel, R., Boldrin, M., BOLZONELLA, TOMMASO, BONFIGLIO, DANIELE, BROMBIN, MATTEO, BUFFA, ANTONIO, BUSTREO, CHIARA, CANTON, ALESSANDRA MARIA, CAPPELLO, SUSANNA, Carraro, L., Cavazzana, R., CESTER, DAVIDE, Chacon, L., CHITARIN, GIUSEPPE, Cooper, W. A., CORDARO, LUIGI, DALLA PALMA, MAURO, DEAMBROSIS, SILVIA MARIA, Delogu, R., De Lorenzi, A., DE MASI, GIANLUCA, Dong, J. Q., Escande, D. F., FASSINA, ALESSANDRO, Felici, F., Ferro, A., FINOTTI, CLAUDIO, Franz, P., FRASSINETTI, LORENZO, Gaio, E., GHEZZI, FEDERICO, GIUDICOTTI, LEONARDO, GNESOTTO, FRANCESCO, GOBBIN, MARCO, GONZALEZ, WINDER ALEXANDER, GRANDO, LUCA, Guo, S. C., Hanson, J. D., Hirshman, S. P., Innocente, P., Jackson, J. L., Kiyama, S., Komm, M., KUDLACEK, ONDREJ, LAGUARDIA, ANNA LUCIA, Li, C., Liu, B., Liu, S. F., Liu, Y. Q., López Bruna, D., Lorenzini, R., Luce, T. C., LUCHETTA, ADRIANO FRANCESCO, MAISTRELLO, ALBERTO, MANDUCHI, GABRIELE, Mansfield, D. K., Marchiori, G., MARCONATO, NICOLO', Marcuzzi, D., MARTIN, PIERO, MARTINES, EMILIO, MARTINI, STEFANO, Mazzitelli, G., Mccormack, O., Miorin, E., MOMO, BARBARA, MORESCO, MAURIZIO, Narushima, Y., Okabayashi, M., Paccagnella, R., Patel, N., Pavei, M., Peruzzo, S., Pilan, N., Pigatto, L., Piovan, R., Piovesan, P., Piron, C., Piron, L., Predebon, I., Pucella, G., Rea, C., Recchia, M., Rizzolo, A., Rostagni, G., Ruset, C., Sajò Bohus, L., Sakakita, H., Sanchez, R., Sarff, J. S., Sattin, F., Scarin, P., Schmitz, O., Schneider, W., Siragusa, M., Sonato, P., Spada, E., Spagnolo, S., Spolaore, M., Spong, D. A., Spizzo, G., Stevanato, L., Suzuki, Y., Taliercio, C., Terranova, D., Tudisco, O., Urso, G., Valente, M., Valisa, M., Vallar, M., Veranda, M., Vianello, N., Villone, F., Vincenzi, P., Visonà, N., White, R. B., Xanthopoulos, P., Xu, X. Y., Yanovskiy, V., Zamengo, A., Zanca, P., Zaniol, B., Zanotto, L., Zhang, Y., Zilli, E., Zuin, M, DAL BELLO, S, Marrelli, L, Puiatti, M, Agostinetti, P, Agostini, M, Antoni, V, Auriemma, F, Barbisan, M, Barbui, T, Baruzzo, M, Belli, F, Bettini, P, Bigi, M, Bilel, R, Boldrin, M, Bolzonella, T, Bonfiglio, D, Brombin, M, Buffa, A, Bustreo, C, Canton, A, Cappello, S, Carraro, L, Cavazzana, R, Cester, D, Chacon, L, Chitarin, G, Cooper, W, Cordaro, L, DALLA PALMA, M, Deambrosis, S, Delogu, R, De Lorenzi, A, DE MASI, G, Dong, J, Escande, D, Fassina, A, Felici, F, Ferro, A, Finotti, C, Franz, P, Frassinetti, L, Gaio, E, Ghezzi, F, Giudicotti, L, Gnesotto, F, Gobbin, M, Gonzalez, W, Grando, L, Guo, S, Hanson, J, Hirshman, S, Innocente, P, Jackson, J, Kiyama, S, Komm, M, Kudlacek, O, Laguardia, A, Li, C, Liu, B, Liu, S, Liu, Y, López Bruna, D, Lorenzini, R, Luce, T, Luchetta, A, Maistrello, A, Manduchi, G, Mansfield, D, Marchiori, G, Marconato, N, Marcuzzi, D, Martin, P, Martines, E, Martini, S, Mazzitelli, G, Mccormack, O, Miorin, E, Momo, B, Moresco, M, Narushima, Y, Okabayashi, M, Paccagnella, R, Patel, N, Pavei, M, Peruzzo, S, Pilan, N, Pigatto, L, Piovan, R, Piovesan, P, Piron, C, Piron, L, Predebon, I, Pucella, G, Rea, C, Recchia, M, Rizzolo, A, Rostagni, G, Ruset, C, Sajò Bohus, L, Sakakita, H, Sanchez, R, Sarff, J, Sattin, F, Scarin, P, Schmitz, O, Schneider, W, Siragusa, M, Sonato, P, Spada, E, Spagnolo, S, Spolaore, M, Spong, D, Spizzo, G, Stevanato, L, Suzuki, Y, Taliercio, C, Terranova, D, Tudisco, O, Urso, G, Valente, M, Valisa, M, Vallar, M, Veranda, M, Vianello, N, Villone, F, Vincenzi, P, Visonà, N, White, R, Xanthopoulos, P, Xu, X, Yanovskiy, V, Zamengo, A, Zanca, P, Zaniol, B, Zanotto, L, Zhang, Y, Zilli, E, ZUIN, MATTEO, DAL BELLO, SILVIA, MARRELLI, LIONELLO, Puiatti, M. E., AGOSTINETTI, PIERO, AGOSTINI, MATTEO, ANTONI, VANNI, AURIEMMA, FULVIO, BARBISAN, MARCO, BARBUI, TULLIO, BARUZZO, MATTEO, Belli, F., BETTINI, PAOLO, Bigi, M., Bilel, R., Boldrin, M., BOLZONELLA, TOMMASO, BONFIGLIO, DANIELE, BROMBIN, MATTEO, BUFFA, ANTONIO, BUSTREO, CHIARA, CANTON, ALESSANDRA MARIA, CAPPELLO, SUSANNA, Carraro, L., Cavazzana, R., CESTER, DAVIDE, Chacon, L., CHITARIN, GIUSEPPE, Cooper, W. A., CORDARO, LUIGI, DALLA PALMA, MAURO, DEAMBROSIS, SILVIA MARIA, Delogu, R., De Lorenzi, A., DE MASI, GIANLUCA, Dong, J. Q., Escande, D. F., FASSINA, ALESSANDRO, Felici, F., Ferro, A., FINOTTI, CLAUDIO, Franz, P., FRASSINETTI, LORENZO, Gaio, E., GHEZZI, FEDERICO, GIUDICOTTI, LEONARDO, GNESOTTO, FRANCESCO, GOBBIN, MARCO, GONZALEZ, WINDER ALEXANDER, GRANDO, LUCA, Guo, S. C., Hanson, J. D., Hirshman, S. P., Innocente, P., Jackson, J. L., Kiyama, S., Komm, M., KUDLACEK, ONDREJ, LAGUARDIA, ANNA LUCIA, Li, C., Liu, B., Liu, S. F., Liu, Y. Q., López Bruna, D., Lorenzini, R., Luce, T. C., LUCHETTA, ADRIANO FRANCESCO, MAISTRELLO, ALBERTO, MANDUCHI, GABRIELE, Mansfield, D. K., Marchiori, G., MARCONATO, NICOLO', Marcuzzi, D., MARTIN, PIERO, MARTINES, EMILIO, MARTINI, STEFANO, Mazzitelli, G., Mccormack, O., Miorin, E., MOMO, BARBARA, MORESCO, MAURIZIO, Narushima, Y., Okabayashi, M., Paccagnella, R., Patel, N., Pavei, M., Peruzzo, S., Pilan, N., Pigatto, L., Piovan, R., Piovesan, P., Piron, C., Piron, L., Predebon, I., Pucella, G., Rea, C., Recchia, M., Rizzolo, A., Rostagni, G., Ruset, C., Sajò Bohus, L., Sakakita, H., Sanchez, R., Sarff, J. S., Sattin, F., Scarin, P., Schmitz, O., Schneider, W., Siragusa, M., Sonato, P., Spada, E., Spagnolo, S., Spolaore, M., Spong, D. A., Spizzo, G., Stevanato, L., Suzuki, Y., Taliercio, C., Terranova, D., Tudisco, O., Urso, G., Valente, M., Valisa, M., Vallar, M., Veranda, M., Vianello, N., Villone, F., Vincenzi, P., Visonà, N., White, R. B., Xanthopoulos, P., Xu, X. Y., Yanovskiy, V., Zamengo, A., Zanca, P., Zaniol, B., Zanotto, L., Zhang, Y., and Zilli, E.

Abstract

This paper reports the main recent results of the RFX-mod fusion science activity. The RFX-mod device is characterized by a unique exibility in terms of accessible magnetic con gurations. Axisymmetric and helically shaped reversed- eld pinch equilibria have been studied, along with tokamak plasmas in a wide range of q(a) regimes (spanning from 4 down to 1.2 values). The full range of magnetic con gurations in between the two, the so-called ultra-low q ones, has been explored, with the aim of studying speci c physical issues common to all equilibria, such as, for example, the density limit phenomenon. The powerful RFX-mod feedback control system has been exploited for MHD control, which allowed us to extend the range of experimental parameters, as well as to induce speci c magnetic perturbations for the study of 3D effects. In particular, transport, edge and isotope effects in 3D equilibria have been investigated, along with runaway mitigations through induced magnetic perturbations. The rst transitions to an improved con nement scenario in circular and D-shaped tokamak plasmas have been obtained thanks to an active modi cation of the edge electric eld through a polarized electrode. The experiments are supported by intense modeling with 3D MHD, gyrokinetic, guiding center and transport codes. Proposed modi cations to the RFX-mod device, which will enable further contributions to the solution of key issues in the roadmap to ITER and DEMO, are also brie y presented.

Published
2017

8. Runaway electron mitigation by applied magnetic perturbations in RFX-mod tokamak plasmas

Author

Gobbin, M, Valisa, M, White, R, Cester, D, Marrelli, L, Nocente, M, Piovesan, P, Stevanato, L, Puiatti, M, Zuin, M, Zuin, M., NOCENTE, MASSIMO, Gobbin, M, Valisa, M, White, R, Cester, D, Marrelli, L, Nocente, M, Piovesan, P, Stevanato, L, Puiatti, M, Zuin, M, Zuin, M., and NOCENTE, MASSIMO

Abstract

Thanks to its advanced system for the control of magnetohydrodynamic modes, the RFXmod device run as a tokamak is particularly suited to the study of the possible impact on runaway electron (RE) de-confinement in response to applied magnetic perturbations. This paper shows that during the flat-top phase in RFX-mod discharges, with a plasma current of Ip∼150 kA and a low density (ne<1019 m-3), the amount of REs scales with the m = 2,n = 1 perturbation both in q(a) < 2 and q(a) > 2 plasmas. Similar results have also been obtained in post-disruption phases, but still with limited statistics. The mechanisms generating REs and the effect of magnetic perturbation (MP) on their confinement are interpreted by numerical simulations with the relativistic guiding center code ORBIT. The role played by different magnetic equilibria on the energy of REs and on their loss rates is investigated. ORBIT simulations indicate that RE-enhanced losses are associated with a raised level of stochasticity, the effect being more pronounced when the MP amplitude is higher and internally resonant

Published
2017

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