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In tokamaks, the role of turbulent transport of heavy impurities, relative to that of neoclassical transport, increases with increasing size of the plasma, as clarified by means of general scalings, which use the ITER standard scenario parameters as reference, and by actual results from a selection of discharges from ASDEX Upgrade and JET. This motivates the theoretical investigation of the properties of the turbulent convection of heavy impurities by nonlinear gyrokinetic simulations in the experimentally relevant conditions of comparable ion and electron heat fluxes. These conditions also correspond to an intermediate regime between dominant ion temperature gradient turbulence and trapped electron mode turbulence. At moderate plasma toroidal rotation, the turbulent convection of heavy impurities, computed with nonlinear gyrokinetic simulations, is found to be directed outward, in contrast to that obtained by quasi-linear calculations based on the most unstable linear mode, which is directed inward. In this mixed turbulence regime, with comparable electron and ion heat fluxes, the nonlinear results of the impurity transport can be explained by the coexistence of both ion temperature gradient and trapped electron modes in the turbulent state, both contributing to the turbulent convection and diffusion of the impurity. The impact of toroidal rotation on the turbulent convection is also clarified.
Gyrokinetic study of turbulent convection of heavy impurities in tokamak plasmas at comparable ion and electron heat fluxes
Upgrade Team, Asdex;Angioni, C.;Bilato, R.;Casson, F. J.;Fable, E.;Mantica, P.;Odstrcil, T.;Valisa, M.;Abhangi, M.;Abreu, P.;Aftanas, M.;Afzal, M.;Aggarwal, K. M.;Aho Mantila, L.;Ahonen, E.;Aints, M.;Airila, M.;Albanese, R.;Alegre, D.;Alessi, E.;Aleynikov, P.;Alfier, A.;Alkseev, A.;Allan, P.;Almaviva, S.;Alonso, A.;Alper, B.;Alsworth, I.;Alves, D.;Ambrosino, G.;Ambrosino, R.;Amosov, V.;Andersson, F.;Andersson Sunde´n, E.;Angelone, M.;Anghel, A.;Anghel, M.;Angioni, C.;Appel, L.;Apruzzese, G.;Arena, P.;Ariola, M.;Arnichand, H.;Arnoux, G.;Arshad, S.;Ash, A.;Asp, E.;Asunta, O.;Cooper, D.;Cooper, S. R.;Corre, Y.;Corrigan, G.;Cortes, S.;Coster, D.;Couchman, A. S.;Cox, M.;Cox, M. P.;Cox, P.;Craciunescu, T.;Cramp, S.;Crisanti, F.;Cristescu, I.;Croci, G.;Croft, O.;Crombe, K.;Crowe, R.;Cruz, N.;Cseh, G.;Cull, K.;Cupido, L.;Curran, D.;Curuia, M.;Czarnecka, A.;Czarski, T.;Dalley, S.;Dalziel, A.;Darrow, D.;Davies, R.;Davis, W.;Day, C.;Day, I. E.;de la Cal, E.;de la Luna, E.;De Magistris, M.;de Pablos, J. L.;De Tommasi, G.;de Vries, P. C.;Deakin, K.;Deane, J.;Decker, J.;Degli Agostini, F.;Dejarnac, R.;Delabie, E.;den Harder, N.;Dendy, R. O.;Denner, P.;Devaux, S.;Devynck, P.;Di Maio, F.;Di Pace, L.;Dittmar, T.;Dodt, D.;Donne, T.;Dooley, P.;Dorling, S. E.;Dormido Canto, S.;Doswon, S.;Douai, D.;Doyle, P. T.;Dreischuh, T.;Drewelow, P.;Drozdov, V.;Drozdowicz, K.;Dumont, R.;Dumortier, P.;Atanasiu, C. V.;Austin, Y.;Avotina, L.;Axton, M. D.;Dunai, D.;Dunne, M.;Dˇuran, I.;Durodie, F.;Ayres, C.;Bachmann, C.;Baciero, A.;Baia˜o, D.;Bailescu, V.;Baiocchi, B.;Baker, A.;Baker, R. A.;Balboa, I.;Balden, M.;Balshaw, N.;Bament, R.;Banks, J. W.;Baranov, Y. F.;Barlow, I. L.;Barnard, M. A.;Barnes, D.;Barnsley, R.;Baron Wiechec, A.;Baruzzo, M.;Basiuk, V.;Bassan, M.;Bastow, R.;Batista, A.;Batistoni, P.;Bauer, R.;Bauvir, B.;Bazylev, B.;Beal, J.;Beaumont, P. S.;Becoulet, A.;Bednarczyk, P.;Bekris, N.;Beldishevski, M.;Bell, K.;Belli, F.;Dutta, P.;Duval, B.;Dux, R.;Dylst, K.;Dzysiuk, N.;Edappala, P. V.;Edwards, A. M.;Eich, T.h.;Ekedahl, A.;Elevant, T.;El Jorf, R.;Elsmore, C. G.;Ericsson, G.;Eriksson, A.;Eriksson, J.;Eriksson, L. G.;Esposito, B.;Esser, H. G.;Esteve, D.;Evans, G. E.;Evans, J.;Ewart, G. D.;Ewers, D. T.;Fagan, D.;Falie, D.;Farthing, J. W.;Fasoli, A.;Fattorini, L.;Faugeras, B.;Faustin, J.;Fawlk, N.;Federici, G.;Fedorczak, N.;Felton, R. C.;Fenzi, C.;Fernades, A.;Fernandes, H.;Ferreira, J.;Bellinger, M.;Belo, J. K.;Belo, P.;Belonohy, E.´.;Fessey, J. A.;Figini, L.;Figueiredo, A.;Figueiredo, J.;Benterman, N. A.;Bergsåker, H.;Bernardo, J.;Bernert, M.;Berry, M.;Bertalot, L.;Beurskens, M. N. A.;Bieg, B.;Bielecki, J.;Biewer, T.;Bigi, M.;B´ılkova, P.;Binda, F.;Bizarro, J. P. S.;Bjo¨ rkas, C.;Blackman, K.;Blackman, T. R.;Blanchard, P.;Blanco, E.;Blatchford, P.;Bobkov, V.;Boboc, A.;Bodna´r, G.;Bogar, O.;Bolzonella, T.;Boncagni, L.;Bonham, R.;Bonheure, G.;Boom, J.;Booth, J.;Borba, D.;Borodin, D.;Botrugno, A.;Boulbe, C.;Boulting, P.;Bovert, K. V.;Bowden, M.;Bower, C.;Boyce, T.;Boyer, H. J.;Bradshaw, J. M. A.;Braic, V.;Breizman, B.;Bremond, S.;Brennan, P. D.;Brett, A.;Brezinsek, S.;Bright, M. D. J.;Brix, M.;Broeckx, W.;Brombin, M.;Brown, B. C.;Brown, D. P. D.;Brown, M.;Bruno, E.;Bucalossi, J.;Buch, J.;Buckley, M. A.;Bucko, K.;Budny, R.;Bufferand, H.;Bulman, M.;Bulmer, N.;Bunting, P.;Buratti, P.;Burcea, G.;Burckhart, A.;Buscarino, A.;Butcher, P. R.;Butler, N. K.;Bykov, I.;Byrne, J.;Byszuk, A.;Cackett, A.;Cahyna, P.;Cain, G.;Calabro, G.;Callaghan, C. P.;Campling, D. C.;Cane, J.;Cannas, B.;Capel, A. J.;Caputano, M.;Card, P. J.;Cardinali, A.;Carman, P.;Carralero, D.;Carraro, L.;Carvalho, B. B.;Carvalho, I.;Carvalho, P.;Casson, F. 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S.;Maddaluno, G.;Maddison, G. P.;Magesh, B.;Maget, P.;Maggi, C. F.;Maier, H.;Mailloux, J.;Maj, A.;Makkonen, T.;Makwana, R.;Malaquias, A.;Mansffield, F.;Mansfield, M.;Manso, M. E.;Mantica, P.;Mantsinen, M.;Manzanares, A.;Marandet, Y.;Marcenko, N.;Marchetto, C.;Marchuk, O.;Marinelli, M.;Marinucci, M.;Markovicˇ, T.;Marocco, D.;Marot, L.;Marren, C. A.;Marsen, S.;Marshal, R.;Martin, A.;Martin, D. L.;Martin, Y.;Mart´ın de Aguilera, A.;Mart´ın Sol´ıs, J. R.;Masiello, A.;Maslov, M.;Maslova, V.;Matejcik, S.;Mattei, M.;Matthews, G. F.;Matveev, D.;Matveev, M.;Maviglia, F.;Mayer, M.;Mayoral, M. L.;Mazon, D.;Mazzotta, C.;Mcadams, R.;Mccarthy, P. J.;Mcclements, K. G.;Mccormick, K.;Mccullen, P. A.;Mcdonald, D.;Mcgregor, R.;Mckean, R.;Mckehon, J.;Mckinley, R.;Meadows, I.;Meadows, R. C.;Medina, F.;Medland, M.;Medley, S.;Meigh, S.;Meigs, A. G.;Meneses, L.;Menmuir, S.;Merrigan, I. R.;Mertens, P.h.;Meshchaninov, S.;Messiaen, A.;Meszaros, B.;Meyer, H.;Miano, G.;Michling, R.;Middleton Gear, D.;Miettunen, J.;Migliucci, P.;Militello Asp, E.;Minucci, S.;Mirizzi, F.;Miyoshi, Y.;Mlyna´ˇr, J.;Monakhov, I.;Monier Garbet, P.;Mooney, R.;Moradi, S.;Mordijck, S.;Moreira, L.;Moreno, R.;Morgan, P. D.;Morgan, R.;Morley, L.;Morlock, C.;Morris, A. W.;Morris, J.;Moser, L.;Moulton, D.;Murari, A.;Muraro, A.;Mustata, I.;Asakura, N. N.;Nabais, F.;Nakano, T.;Nardon, E.;Naulin, V.;Nave, M. F. F.;Nedzelski, I.;Neethiraj, N.;Nemtsev, G.;Nespoli, F.;Neto, A.;Neu, R.;Neubauer, O.;Newman, M.;Nicholls, K. J.;Nicolai, D.;Nicolas, T.;Nieckchen, P.;Nielsen, P.;Nightingale, M. P. S.;Nilsson, E.;Nishijima, D.;Noble, C.;Nocente, M.;Nodwell, D.;Nordman, H.;Nunes, I.;O’Meara, B.;Oberkofler, M.;Obryk, B.;Odupitan, T.;Ogawa, M. T.;O’Gorman, T.;Okabayashi, M.;Olariu, S.;O’Mullane, M.;Ongena, J.;Orsitto, F.;Oswuigwe, B. 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J.;Sharapov, S. E.;Shaw, I.;Shaw, S. R.;Shepherd, A.;Shevelev, A.;Shumack, A.;Sibbald, M.;Sieglin, B.;Silva, C.;Simmons, P. A.;Sinha, A.;Sipila, S. K.;Sips, A. C. C.;Sire´n, P.;Sirinelli, A.;Sjo¨ strand, H.;Skiba, M.;Skilton, R.;Slade, B.;Smith, N.;Smith, P. G.;Smith, T. J.;Snoj, L.;Soare, S.;Solano, E. R.;Soldatov, S.;Sonato, P.;Sopplesa, A.;Sousa, J.;Sowden, C. B. C.;Sozzi, C.;Sparkes, A.;Spelzini, T.;Spineanu, F.;Stables, G.;Stamatelatos, I.;Stamp, M. F.;Stancalie, V.;Stankiewicz, R.;Stanku¯ nas, G.;Stano, M.;Stan Sion, C.;Starkey, D. E.;Stead, M. J.;Stejner, M.;Stephen, A. V.;Stephen, M.;Stevens, B. D.;Stoyanov, D.;Strachan, J.;Strand, P.;Stransky, M.;Stro¨ m, P.;Stubbs, G.;Studholme, W.;Subba, F.;Summers, H. P.;Sun, Y.;Svensson, J.;Sykes, N.;Syme, B. D.;Szabolics, T.;Szepesi, G.;Szydlowski, A.;Suzuki, T. T.;Tabare´s, F.;Takalo, V.;Ta´l, B.;Tala, T.;Talbot, A. R.;Taliercio, C.;Tamain, P.;Tame, C.;Tardocchi, M.;Taroni, L.;Taylor, K. 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2017-01-01
Abstract
In tokamaks, the role of turbulent transport of heavy impurities, relative to that of neoclassical transport, increases with increasing size of the plasma, as clarified by means of general scalings, which use the ITER standard scenario parameters as reference, and by actual results from a selection of discharges from ASDEX Upgrade and JET. This motivates the theoretical investigation of the properties of the turbulent convection of heavy impurities by nonlinear gyrokinetic simulations in the experimentally relevant conditions of comparable ion and electron heat fluxes. These conditions also correspond to an intermediate regime between dominant ion temperature gradient turbulence and trapped electron mode turbulence. At moderate plasma toroidal rotation, the turbulent convection of heavy impurities, computed with nonlinear gyrokinetic simulations, is found to be directed outward, in contrast to that obtained by quasi-linear calculations based on the most unstable linear mode, which is directed inward. In this mixed turbulence regime, with comparable electron and ion heat fluxes, the nonlinear results of the impurity transport can be explained by the coexistence of both ion temperature gradient and trapped electron modes in the turbulent state, both contributing to the turbulent convection and diffusion of the impurity. The impact of toroidal rotation on the turbulent convection is also clarified.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11563/126998
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simulazione ASN
Il report seguente simula gli indicatori relativi alla propria produzione scientifica in relazione alle soglie ASN 2023-2025 del proprio SC/SSD. Si ricorda che il superamento dei valori soglia (almeno 2 su 3) è requisito necessario ma non sufficiente al conseguimento dell'abilitazione. La simulazione si basa sui dati IRIS e sugli indicatori bibliometrici alla data indicata e non tiene conto di eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori. La simulazione può differire dall'esito di un’eventuale domanda ASN sia per errori di catalogazione e/o dati mancanti in IRIS, sia per la variabilità dei dati bibliometrici nel tempo. Si consideri che Anvur calcola i valori degli indicatori all'ultima data utile per la presentazione delle domande.
La presente simulazione è stata realizzata sulla base delle specifiche raccolte sul tavolo ER del Focus Group IRIS coordinato dall’Università di Modena e Reggio Emilia e delle regole riportate nel DM 589/2018 e allegata Tabella A. Cineca, l’Università di Modena e Reggio Emilia e il Focus Group IRIS non si assumono alcuna responsabilità in merito all’uso che il diretto interessato o terzi faranno della simulazione. Si specifica inoltre che la simulazione contiene calcoli effettuati con dati e algoritmi di pubblico dominio e deve quindi essere considerata come un mero ausilio al calcolo svolgibile manualmente o con strumenti equivalenti.