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102. SPIDER in the roadmap of the ITER neutral beams

Author

M. Valente, Roberto Pasqualotto, M. Pavei, A. Ferro, M. Recchia, S. Dal Bello, Matteo Agostini, R. Piovan, Silvia Spagnolo, D. Boilson, Piergiorgio Sonato, M. Ugoletti, Marco Boldrin, Roberto Cavazzana, M. Battistella, L. Ferbel, S. Denizeau, Gianluigi Serianni, Marco Barbisan, Giuseppe Marchiori, Marco Cavenago, Vanni Toigo, Pierluigi Zaccaria, V. Antoni, C. Rotti, P. Jain, Luca Grando, W. Kraus, Mieko Kashiwagi, Bernd Heinemann, G. Rostagni, P. Tinti, Katsuyoshi Tsumori, M. Fadone, C. Baltador, S. Manfrin, Nicolò Marconato, G. Gambetta, N. Pomaro, Piero Agostinetti, Nicola Pilan, Gabriele Manduchi, F. Paolucci, A. Masiello, Loris Zanotto, Giuseppe Chitarin, A. De Lorenzi, B. Zaniol, C. Taliercio, M. Dan, M. Brombin, Namita Singh, T. Patton, F. Gasparini, Ursel Fantz, M. Moresco, M. Zaupa, M. Siragusa, A.K. Chakraborty, M. De Muri, A. Zamengo, S. Muriel, Simone Peruzzo, Elena Gaio, D. Aprile, E. Spada, M. Bigi, A. Pimazzoni, Pierluigi Veltri, M. Spolaore, Francesco Gnesotto, Emanuele Sartori, Diego Marcuzzi, Tullio Bonicelli, F. Fellin, Adriano Luchetta, R. Delogu, A. Maistrello, C. Poggi, M. Dalla Palma, A. Rizzolo, Hitesh Patel, Serianni, G., Toigo, V., Bigi, M., Boldrin, M., Chitarin, G., Dal Bello, S., Grando, L., Luchetta, A., Marcuzzi, D., Pasqualotto, R., Pomaro, N., 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., Denizeau, S., Fadone, M., Fellin, F., Ferbel, L., Ferro, A., Gaio, E., Gambetta, G., Gasparini, F., Gnesotto, F., Jain, P., Maistrello, A., Manduchi, G., Manfrin, S., Marchiori, G., Marconato, N., Moresco, M., 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., Spada, E., Spagnolo, S., Spolaore, M., Taliercio, C., Tinti, P., Ugoletti, M., Valente, M., Zamengo, A., Zaniol, B., Zaupa, M., Baltador, C., Cavenago, M., Boilson, D., Rotti, C., Veltri, P., Bonicelli, T., Paolucci, F., Muriel, S., Masiello, A., Chakraborty, A., Patel, H., Singh, N. P., Fantz, U., Heinemann, B., Kraus, W., Kashiwagi, M., and Tsumori, K.

Subjects
Materials science, Mechanical Engineering, Nuclear engineering, Plasma, 01 natural sciences, 7. Clean energy, Ion source, 010305 fluids & plasmas, Ion, Nuclear Energy and Engineering, Deuterium, Physics::Plasma Physics, Neutral beam injectors, 0103 physical sciences, Physics::Accelerator Physics, Particle, Negative ion beam, General Materials Science, Negative ion source, 010306 general physics, Current density, Beam (structure), Civil and Structural Engineering, Beam divergence
Abstract

To reach fusion conditions and control plasma configuration in ITER, a suitable combination of additional heating and current drive systems is necessary. Among them, two Neutral Beam Injectors (NBI) will provide 33 MW hydrogen/deuterium particles electrostatically accelerated to 1 MeV; efficient gas-cell neutralisation at such beam energy requires negative ions, obtained by caesium-catalysed surface conversion of atoms inside the ion source. As ITER NBI requirements have never been simultaneously attained, a Neutral Beam Test Facility (NBTF) was set up at Consorzio RFX (Italy), including two experiments. MITICA is the full-scale NBI prototype with 1 MeV particle energy. SPIDER, with 100 keV particle energy, aims at testing and optimising the full-scale ion source: extracted beam uniformity, negative ion current density (for one hour) and beam optics (beam divergence

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

Author

M. Pavei, Alessandra Canton, Matteo Agostini, R. Piovan, Matteo Zuin, G. Mazzitelli, L. Piron, N. Vianello, J.Q. Dong, B. E. Chapman, A. Zamengo, Gianluca Spizzo, Paolo Zanca, T. Barbui, Hajime Sakakita, Piergiorgio Sonato, Nicola Pilan, Yueqiang Liu, Daniele Bonfiglio, P. Piovesan, Lorella Carraro, T.C. Luce, J. L. Jackson, C. Finotti, E. Miorin, M. Recchia, S.P. Hirshman, Rita Lorenzini, Andrea Rizzolo, Roberto Paccagnella, G. Ciaccio, A. Scaggion, Enrico Zilli, Nicolò Marconato, Paolo Scarin, S. Martini, M. Baruzzo, James D. Hanson, M. Veranda, L. Marrelli, M. Bigi, Marco Barbisan, W. A. Cooper, L. Zanotto, Piero Agostinetti, L. Laguardia, Chenguang Li, C. Taliercio, F. Fellin, Oliver Schmitz, Cristian Ruset, Luca Grando, Zhirui Wang, Lorenzo Frassinetti, Silvia Spagnolo, X. Y. Xu, Simone Peruzzo, B. Esposito, Erik Olofsson, Elena Gaio, M. Furno Palumbo, M. Okabayashi, Nisarg Patel, G. L. Trevisan, Matthias Komm, M. Spolaore, Francesco Gnesotto, S. C. Guo, Raul Sanchez, D. Terranova, Susanna Cappello, R. Bilel, G. Urso, Marco Gobbin, Fabio Villone, E. Spada, M. Moresco, D. Cester, Emanuele Sartori, L. Pigatto, Leonardo Giudicotti, B. Momo, Tommaso Bolzonella, Piero Martin, Luis Chacon, A. L. Roquemore, F. Belli, Barbara Zaniol, C. Piron, F. Sattin, N. Visona, F. Ghezzi, R. Delogu, Emilio Martines, Diego Marcuzzi, D. F. Escande, A. De Lorenzi, M. Dalla Palma, Paolo Franz, Cristina Rea, Adriano Luchetta, Paolo Bettini, Roscoe White, A. Maistrello, Alessandro Fassina, G. Rostagni, Manabu Takechi, Roberto Cavazzana, G. Viesti, M. Boldrin, V. Yanovskiy, Giuseppe Marchiori, D.K. Mansfield, Satoru Kiyama, W. A. Gonzales, M. Valisa, A. Buffa, Pavlos Xanthopoulos, J. S. Sarff, M. E. Puiatti, Go Matsunaga, M. Valente, S. M. Deambrosis, Alberto Ferro, Paolo Innocente, Italo Predebon, V. Rigato, S. Dal Bello, Gabriele Manduchi, Fulvio Auriemma, G. De Masi, P. Vincenzi, Donald A. Spong, M. Battistella, Songfen Liu, D. Marocco, M. Brombin, Laszlo Sajo-Bohus, Giuseppe Chitarin, A. Ruzzon, V. Antoni, L. Stevanato, Consorzio RFX, Associazione Euratom/ENEA sulla Fusione (RFX), Agenzia Nazionale per le nuove Tecnologie, l’energia e lo sviluppo economico sostenibile = Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Laboratori Nazionali di Frascati (LNF), Istituto Nazionale di Fisica Nucleare (INFN), National Institute for Laser, Plasma and Radiation Physics (INFLPR), STMicroelectronics [Crolles] (ST-CROLLES), Canadian Institute for Theoretical Astrophysics (CITA), Département Méthodes et Modèles Mathématiques pour l'Industrie (3MI-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Centre G2I, Physique des interactions ioniques et moléculaires (PIIM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Department of Physics [Stockholm], Stockholm University, Inst Subtrop Agr, Res Ctr Healthy Breeding Livestock & Poultry, Hunan Engn, Chinese Academy of Sciences [Changchun Branch] (CAS), Inst Subtrop Agr, Res Ctr Anim & Poultry Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, 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, and Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA)

Subjects
Convection, Physics, [PHYS]Physics [physics], Nuclear and High Energy Physics, Toroid, Tokamak, Reversed field pinch, Turbulence, single helicity, Electron, Mechanics, Sawtooth wave, reversed field pinch, Condensed Matter Physics, 01 natural sciences, 010305 fluids & plasmas, law.invention, 3D boundary, law, Physics::Plasma Physics, 0103 physical sciences, Magnetohydrodynamics, Atomic physics, 010306 general physics, tokamak
Abstract

25th Fusion Energy Conference (FEC), Govt Russian Federat, St ă Petersburg, RUSSIA, OCT 13-18, 2014; International audience; The RFX-mod device is operated both as a reversed field pinch (RFP), ă where advanced regimes featuring helical shape develop, and as a ă tokamak. Due to its flexibility, RFX-mod is contributing to the solution ă of key issues in the roadmap to ITER and DEMO, including MHD instability ă control, internal transport barriers, edge transport and turbulence, ă isotopic effect, high density limit and three-dimensional (3D) ă non-linear MHD modelling. This paper reports recent advancements in the ă understanding of the self-organized helical states, featuring a strong ă electron transport barrier, in the RFP configuration; the physical ă mechanism driving the residual transport at the barrier has been ă investigated. Following the first experiments with deuterium as the ă filling gas, new results concerning the isotope effect in the RFP are ă discussed. Studies on the high density limit show that in the RFP it is ă related to a toroidal particle accumulation due to the onset of a ă convective cell. In the tokamak configuration, q(a) regimes down to q(a) ă = 1.2 have been pioneered, with (2,1) tearing mode (TM) mitigated and ă (2,1) resistive wall mode (RWM) stabilized: the control of such modes ă can be obtained both by poloidal and radial sensors. Progress has been ă made in the avoidance of disruptions due to the (2,1) TM by applying ă q(a) control, and on the general issue of error field control. The ă effect of externally applied 3D fields on plasma flow and edge ă turbulence, sawtooth control and runaway electron decorrelation has been ă analysed. The experimental program is supported by substantial ă theoretical activity: 3D non-linear visco-resistive MHD and non-local ă transport modelling have been advanced; RWMs have been studied by a ă toroidal MHD kinetic hybrid stability code.

104. Fifth Forces from QCD Axions Scale Differently.

Author

Bauer M and Rostagni G

Abstract

We reexamine the low-energy potential for a macroscopic fifth force generated from the exchange of two axions. The shift symmetry of the linear axion interactions leads to a potential falling off as V(r)∼1/r^{5}. We find that in the case of the QCD axion higher-order terms in the Lagrangian break the shift symmetry and lead to the dominant contribution to the potential scaling as V(r)∼1/r^{3}. These terms are generated by the same physics responsible for the axion mass, and therefore the new contributions to the potential induce a different force for external nucleons and leptons. We demonstrate how this result affects the sensitivity of searches for new long-range forces.

Published
2024
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