Attenzione: i dati modificati non sono ancora stati salvati. Per confermare inserimenti o cancellazioni di voci è necessario confermare con il tasto SALVA/INSERISCI in fondo alla pagina
The dynamics for the transition from L-mode to a stationary high QDT H-mode regime in ITER is expected to be qualitatively different to present experiments. Differences may be caused by a low fuelling efficiency of recycling neutrals, that influence the post transition plasma density evolution on the one hand. On the other hand, the effect of the plasma density evolution itself both on the alpha heating power and the edge power flow required to sustain the H-mode confinement itself needs to be considered. This paper presents results of modelling studies of the transition to stationary high QDT H-mode regime in ITER with the JINTRAC suite of codes, which include optimisation of the plasma density evolution to ensure a robust achievement of high QDT regimes in ITER on the one hand and the avoidance of tungsten accumulation in this transient phase on the other hand. As a first step, the JINTRAC integrated models have been validated in fully predictive simulations (excluding core momentum transport which is prescribed) against core, pedestal and divertor plasma measurements in JET C-wall experiments for the transition from L-mode to stationary H-mode in partially ITER relevant conditions (highest achievable current and power, H-98,H-y similar to 1.0, low collisionality, comparable evolution in P-net/PL-H, but different rho(*), T-i/T-e, Mach number and plasma composition compared to ITER expectations). The selection of transport models (core: NCLASS + Bohm/gyroBohm in L-mode/GLF23 in H-mode) was determined by a trade-off between model complexity and efficiency. Good agreement between code predictions and measured plasma parameters is obtained if anomalous heat and particle transport in the edge transport barrier are assumed to be reduced at different rates with increasing edge power flow normalised to the H-mode threshold; in particular the increase in edge plasma density is dominated by this edge transport reduction as the calculated neutral influx across the separatrix remains unchanged (or even slightly decreases) following the H-mode transition. JINTRAC modelling of H-mode transitions for the ITER 15 MA/5.3 T high Q(DT) scenarios with the same modelling assumptions as those being derived from JET experiments has been carried out. The modelling finds that it is possible to access high Q(DT) conditions robustly for additional heating power levels of P-AUX >= 53 MW by optimising core and edge plasma fuelling in the transition from L-mode to high Q(DT) H-mode. An initial period of low plasma density, in which the plasma accesses the H-mode regime and the alpha heating power increases, needs to be considered after the start of the additional heating, which is then followed by a slow density ramp. Both the duration of the low density phase and the density ramp-rate depend on boundary and operational conditions and can be optimised to minimise the resistive flux consumption in this transition phase. The modelling also shows that fuelling schemes optimised for a robust access to high Q(DT) H-mode in ITER are also optimum for the prevention of the contamination of the core plasma by tungsten during this phase.
Modelling of transitions between L- and H-mode in JET high plasma current plasmas and application to ITER scenarios including tungsten behaviour
Koechl, F.;Loarte, A.;Parail, V.;Belo, P.;Brix, M.;Corrigan, G.;Harting, D.;Koskela, T.;Kukushkin, A. S.;Polevoi, A. R.;Romanelli, M.;Saibene, G.;Sartori, R.;Eich, T.;Abduallev, S.;Abhangi, M.;Abreu, P.;Afzal, M.;Aggarwal, K. M.;Ahlgren, T.;Ahn, J. H.;Aho-Mantila, L.;Aiba, N.;Airila, M.;Albanese, R.;Aldred, V.;Alegre, D.;Alessi, E.;Aleynikov, P.;Alfier, A.;Alkseev, A.;Allinson, M.;Alper, B.;Alves, E.;Ambrosino, G.;Ambrosino, R.;Amicucci, L.;Amosov, V.;Sunden, E. Andersson;Angelone, M.;Anghel, M.;Angioni, C.;Appel, L.;Appelbee, C.;Arena, P.;Ariola, M.;Arnichand, H.;Arshad, S.;Ash, A.;Ashikawa, N.;Aslanyan, V.;Asunta, O.;Auriemma, F.;Austin, Y.;Avotina, L.;Axton, M. D.;Ayres, C.;Bacharis, M.;Baciero, A.;Baiao, D.;Bailey, S.;Baker, A.;Balboa, I.;Balden, M.;Balshaw, N.;Bament, R.;Banks, J. W.;Baranov, Y. F.;Barnard, M. A.;Barnes, D.;Barnes, M.;Barnsley, R.;Wiechec, A. Baron;Orte, L. Barrera;Baruzzo, M.;Basiuk, V.;Bassan, M.;Bastow, R.;Batista, A.;Batistoni, P.;Baughan, R.;Bauvir, B.;Baylor, L.;Bazylev, B.;Beal, J.;Beaumont, P. S.;Beckers, M.;Beckett, B.;Becoulet, A.;Bekris, N.;Beldishevski, M.;Bell, K.;Belli, F.;Bellinger, M.;Belonohy, E.;Ben Ayed, N.;Benterman, N. A.;Bergsaker, H.;Bernardo, J.;Bernert, M.;Berry, M.;Bertalot, L.;Besliu, C.;Beurskens, M.;Bieg, B.;Bielecki, J.;Biewer, T.;Bigi, M.;Bilkova, P.;Binda, F.;Bisoffi, A.;Bizarro, J. P. S.;Bjorkas, C.;Blackburn, J.;Blackman, K.;Blackman, T. R.;Blanchard, P.;Blatchford, P.;Bobkov, V.;Boboc, A.;Bodnar, G.;Bogar, O.;Bolshakova, I.;Bolzonella, T.;Bonanomi, N.;Bonelli, F.;Boom, J.;Booth, J.;Borba, D.;Borodin, D.;Borodkina, I.;Botrugno, A.;Bottereau, C.;Boulting, P.;Bourdelle, C.;Bowden, M.;Bower, C.;Bowman, C.;Boyce, T.;Boyd, C.;Boyer, H. J.;Bradshaw, J. M. A.;Braic, V.;Bravanec, R.;Breizman, B.;Bremond, S.;Brennan, P. D.;Breton, S.;Brett, A.;Brezinsek, S.;Bright, M. D. J.;Brix, M.;Broeckx, W.;Brombin, M.;Broslawski, A.;Brown, D. P. D.;Brown, M.;Bruno, E.;Bucalossi, J.;Buch, J.;Buchanan, J.;Buckley, M. A.;Budny, R.;Bufferand, H.;Bulman, M.;Bulmer, N.;Bunting, P.;Buratti, P.;Burckhart, A.;Buscarino, A.;Busse, A.;Butler, N. K.;Bykov, I.;Byrne, J.;Cahyna, P.;Calabro, G.;Calvo, I.;Camenen, Y.;Camp, P.;Campling, D. C.;Cane, J.;Cannas, B.;Capel, A. J.;Card, P. J.;Cardinali, A.;Carman, P.;Carr, M.;Carralero, D.;Carraro, L.;Carvalho, B. B.;Carvalho, I.;Carvalho, P.;Casson, F. J.;Castaldo, C.;Catarino, N.;Caumont, J.;Causa, F.;Cavazzana, R.;Cave-Ayland, K.;Cavinato, M.;Cecconello, M.;Ceccuzzi, S.;Cecil, E.;Cenedese, A.;Cesario, R.;Challis, C. D.;Chandler, M.;Chandra, D.;Chang, C. S.;Chankin, A.;Chapman, I. T.;Chapman, S. C.;Chernyshova, M.;Chitarin, G.;Ciraolo, G.;Ciric, D.;Citrin, J.;Clairet, F.;Clark, E.;Clark, M.;Clarkson, R.;Clatworthy, D.;Clements, C.;Cleverly, M.;Coad, J. P.;Coates, P. A.;Cobalt, A.;Coccorese, V.;Cocilovo, V.;Coda, S.;Coelho, R.;Coenen, J. W.;Coffey, I.;Colas, L.;Collins, S.;Conka, D.;Conroy, S.;Conway, N.;Coombs, D.;Cooper, D.;Cooper, S. R.;Corradino, C.;Corre, Y.;Corrigan, G.;Cortes, S.;Coster, D.;Couchman, A. S.;Cox, M. P.;Craciunescu, T.;Cramp, S.;Craven, R.;Crisanti, F.;Croci, G.;Croft, D.;Crombe, K.;Crowe, R.;Cruz, N.;Cseh, G.;Cufar, A.;Cullen, A.;Curuia, M.;Czarnecka, A.;Dabirikhah, H.;Dalgliesh, P.;Dalley, S.;Dankowski, J.;Darrow, D.;Davies, O.;Davis, W.;Day, C.;Day, I. E.;De Bock, M.;de Castro, A.;de la Cal, E.;de la Luna, E.;De Masi, G.;de Pablos, J. L.;De Temmerman, G.;De Tommasi, G.;de Vries, P.;Deakin, K.;Deane, J.;Agostini, F. Degli;Dejarnac, R.;Delabie, E.;den Harder, N.;Dendy, R. O.;Denis, J.;Denner, P.;Devaux, S.;Devynck, P.;Di Maio, F.;Di Siena, A.;Di Troia, C.;Dinca, P.;D'Inca, R.;Ding, B.;Dittmar, T.;Doerk, H.;Doerner, R. P.;Donne, T.;Dorling, S. E.;Dormido-Canto, S.;Doswon, S.;Douai, D.;Doyle, P. T.;Drenik, A.;Drewelow, P.;Drews, P.;Duckworth, Ph.;Dumont, R.;Dumortier, P.;Dunai, D.;Dunne, M.;Duran, I.;Durodie, F.;Dutta, P.;Duval, B. P.;Dux, R.;Dylst, K.;Dzysiuk, N.;Edappala, P. V.;Edmond, J.;Edwards, A. M.;Edwards, J.;Eich, Th.;Ekedahl, A.;El-Jorf, R.;Elsmore, C. G.;Enachescu, M.;Ericsson, G.;Eriksson, F.;Eriksson, J.;Eriksson, L. G.;Esposito, B.;Esquembri, S.;Esser, H. G.;Esteve, D.;Evans, B.;Evans, G. E.;Evison, G.;Ewart, G. D.;Fagan, D.;Faitsch, M.;Falie, D.;Fanni, A.;Fasoli, A.;Faustin, J. M.;Fawlk, N.;Fazendeiro, L.;Fedorczak, N.;Felton, R. C.;Fenton, K.;Fernades, A.;Fernandes, H.;Ferreira, J.;Fessey, J. A.;Fevrier, O.;Ficker, O.;Field, A.;Fietz, S.;Figueiredo, A.;Figueiredo, J.;Fil, A.;Finburg, P.;Firdaouss, M.;Fischer, U.;Fittill, L.;Fitzgerald, M.;Flammini, D.;Flanagan, J.;Fleming, C.;Flinders, K.;Fonnesu, N.;Fontdecaba, J. M.;Formisano, A.;Forsythe, L.;Fortuna, L.;Fortuna-Zalesna, E.;Fortune, M.;Foster, S.;Franke, T.;Franklin, T.;Frasca, M.;Frassinetti, L.;Freisinger, M.;Fresa, R.;Frigione, D.;Fuchs, V.;Fuller, D.;Futatani, S.;Fyvie, J.;Gal, K.;Galassi, D.;Galazka, K.;Galdon-Quiroga, J.;Gallagher, J.;Gallart, D.;Galvao, R.;Gao, X.;Gao, Y.;Garcia, J.;Garcia-Carrasco, A.;Garcia-Munoz, M.;Gardarein, J. -L.;Garzotti, L.;Gaudio, P.;Gauthier, E.;Gear, D. F.;Gee, S. J.;Geiger, B.;Gelfusa, M.;Gerasimov, S.;Gervasini, G.;Gethins, M.;Ghani, Z.;Ghate, M.;Gherendi, M.;Giacalone, J. C.;Giacomelli, L.;Gibson, C. S.;Giegerich, T.;Gil, C.;Gil, L.;Gilligan, S.;Gin, D.;Giovannozzi, E.;Girardo, J. B.;Giroud, C.;Giruzzi, G.;Gloeggler, S.;Godwin, J.;Goff, J.;Gohil, P.;Goloborod'ko, V.;Gomes, R.;Goncalves, B.;Goniche, M.;Goodliffe, M.;Goodyear, A.;Gorini, G.;Gosk, M.;Goulding, R.;Goussarov, A.;Gowland, R.;Graham, B.;Graham, M. E.;Graves, J. P.;Grazier, N.;Grazier, P.;Green, N. R.;Greuner, H.;Grierson, B.;Griph, F. S.;Grisolia, C.;Grist, D.;Groth, M.;Grove, R.;Grundy, C. N.;Grzonka, J.;Guard, D.;Guerard, C.;Guillemaut, C.;Guirlet, R.;Gurl, C.;Utoh, H. H.;Hackett, L. J.;Hacquin, S.;Hagar, A.;Hager, R.;Hakola, A.;Halitovs, M.;Hall, S. J.;Cook, S. P. Hallworth;Hamlyn-Harris, C.;Hammond, K.;Harrington, C.;Harrison, J.;Harting, D.;Hasenbeck, F.;Hatano, Y.;Hatch, D. R.;Haupt, T. D. V.;Hawes, J.;Hawkes, N. C.;Hawkins, J.;Hawkins, P.;Haydon, P. W.;Hayter, N.;Hazel, S.;Heesterman, P. J. L.;Heinola, K.;Hellesen, C.;Hellsten, T.;Helou, W.;Hemming, O. N.;Hender, T. C.;Henderson, M.;Henderson, S. S.;Henriques, R.;Hepple, D.;Hermon, G.;Hertout, P.;Hidalgo, C.;Highcock, E. G.;Hill, M.;Hillairet, J.;Hillesheim, J.;Hillis, D.;Hizanidis, K.;Hjalmarsson, A.;Hobirk, J.;Hodille, E.;Hogben, C. H. A.;Hogeweij, G. M. D.;Hollingsworth, A.;Hollis, S.;Homfray, D. A.;Horacek, J.;Hornung, G.;Horton, A. R.;Horton, L. D.;Horvath, L.;Hotchin, S. P.;Hough, M. R.;Howarth, P. J.;Hubbard, A.;Huber, A.;Huber, V.;Huddleston, T. M.;Hughes, M.;Huijsmans, G. T. A.;Hunter, C. L.;Huynh, P.;Hynes, A. M.;Iglesias, D.;Imazawa, N.;Imbeaux, F.;Imrisek, M.;Incelli, M.;Innocente, P.;Irishkin, M.;Ivanova-Stanik, I.;Jachmich, S.;Jacobsen, A. S.;Jacquet, P.;Jansons, J.;Jardin, A.;Jarvinen, A.;Jaulmes, F.;Jednorog, S.;Jenkins, I.;Jeong, C.;Jepu, I.;Joffrin, E.;Johnson, R.;Johnson, T.;Johnston, Jane;Joita, L.;Jones, G.;Jones, T. T. C.;Hoshino, K. K.;Kallenbach, A.;Kamiya, K.;Kaniewski, J.;Kantor, A.;Kappatou, A.;Karhunen, J.;Karkinsky, D.;Karnowska, I.;Kaufman, M.;Kaveney, G.;Kazakov, Y.;Kazantzidis, V.;Keeling, D. L.;Keenan, T.;Keep, J.;Kempenaars, M.;Kennedy, C.;Kenny, D.;Kent, J.;Kent, O. N.;Khilkevich, E.;Kim, H. T.;Kim, H. S.;Kinch, A.;King, C.;King, D.;King, R. F.;Kinna, D. J.;Kiptily, V.;Kirk, A.;Kirov, K.;Kirschner, A.;Kizane, G.;Klepper, C.;Klix, A.;Knight, P.;Knipe, S. J.;Knott, S.;Kobuchi, T.;Koechl, F.;Kocsis, G.;Kodeli, I.;Kogan, L.;Kogut, D.;Koivuranta, S.;Kominis, Y.;Koeppen, M.;Kos, B.;Koskela, T.;Koslowski, H. R.;Koubiti, M.;Kovari, M.;Kowalska-Strzeciwilk, E.;Krasilnikov, A.;Krasilnikov, V.;Krawczyk, N.;Kresina, M.;Krieger, K.;Krivska, A.;Kruezi, U.;Ksiazek, I.;Kukushkin, A.;Kundu, A.;Kurki-Suonio, T.;Kwak, S.;Kwiatkowski, R.;Kwon, O. J.;Laguardia, L.;Lahtinen, A.;Laing, A.;Lam, N.;Lambertz, H. T.;Lane, C.;Lang, P. T.;Lanthaler, S.;Lapins, J.;Lasa, A.;Last, J. R.;Laszynska, E.;Lawless, R.;Lawson, A.;Lawson, K. D.;Lazaros, A.;Lazzaro, E.;Leddy, J.;Lee, S.;Lefebvre, X.;Leggate, H. J.;Lehmann, J.;Lehnen, M.;Leichtle, D.;Leichuer, P.;Leipold, F.;Lengar, I.;Lennholm, M.;Lerche, E.;Lescinskis, A.;Lesnoj, S.;Letellier, E.;Leyland, M.;Leysen, W.;Li, L.;Liang, Y.;Likonen, J.;Linke, J.;Linsmeier, Ch.;Lipschultz, B.;Liu, G.;Liu, Y.;Lo Schiavo, V. P.;Loarer, T.;Loarte, A.;Lobel, R. C.;Lomanowski, B.;Lomas, P. J.;Lonnroth, J.;Lopez, J. M.;Lopez-Razola, J.;Lorenzini, R.;Losada, U.;Lovell, J. J.;Loving, A. B.;Lowry, C.;Luce, T.;Lucock, R. M. A.;Lukin, A.;Luna, C.;Lungaroni, M.;Lungu, C. P.;Lungu, M.;Lunniss, A.;Lupelli, I.;Lyssoivan, A.;Macdonald, N.;Macheta, P.;Maczewa, K.;Magesh, B.;Maget, P.;Maggi, C.;Maier, H.;Mailloux, J.;Makkonen, T.;Makwana, R.;Malaquias, A.;Malizia, A.;Manas, P.;Manning, A.;Manso, M. E.;Mantica, P.;Mantsinen, M.;Manzanares, A.;Maquet, Ph.;Marandet, Y.;Marcenko, N.;Marchetto, C.;Marchuk, O.;Marinelli, M.;Marinucci, M.;Markovic, T.;Marocco, D.;Marot, L.;Marren, C. A.;Marshal, R.;Martin, A.;Martin, Y.;Martin de Aguilera, A.;Martinez, F. J.;Martin-Solis, J. R.;Martynova, Y.;Maruyama, S.;Masiello, A.;Maslov, M.;Matejcik, S.;Mattei, M.;Matthews, G. F.;Maviglia, F.;Mayer, M.;Mayoral, M. L.;May-Smith, T.;Mazon, D.;Mazzotta, C.;McAdams, R.;McCarthy, P. J.;McClements, K. G.;McCormack, O.;McCullen, P. A.;McDonald, D.;McIntosh, S.;McKean, R.;McKehon, J.;Meadows, R. C.;Meakins, A.;Medina, F.;Medland, M.;Medley, S.;Meigh, S.;Meigs, A. G.;Meisl, G.;Meitner, S.;Meneses, L.;Menmuir, S.;Mergia, K.;Merrigan, I. R.;Mertens, Ph.;Meshchaninov, S.;Messiaen, A.;Meyer, H.;Mianowski, S.;Michling, R.;Middleton-Gear, D.;Miettunen, J.;Militello, F.;Militello-Asp, E.;Miloshevsky, G.;Mink, F.;Minucci, S.;Miyoshi, Y.;Mlynar, J.;Molina, D.;Monakhov, I.;Moneti, M.;Mooney, R.;Moradi, S.;Mordijck, S.;Moreira, L.;Moreno, R.;Moro, F.;Morris, A. W.;Morris, J.;Moser, L.;Mosher, S.;Moulton, D.;Murari, A.;Muraro, A.;Murphy, S.;Asakura, N. N.;Na, Y. S.;Nabais, F.;Naish, R.;Nakano, T.;Nardon, E.;Naulin, V.;Nave, M. F. F.;Nedzelski, I.;Nemtsev, G.;Nespoli, F.;Neto, A.;Neu, R.;Neverov, V. S.;Newman, M.;Nicholls, K. J.;Nicolas, T.;Nielsen, A. H.;Nielsen, P.;Nilsson, E.;Nishijima, D.;Noble, C.;Nocente, M.;Nodwell, D.;Nordlund, K.;Nordman, H.;Nouailletas, R.;Nunes, I.;Oberkofler, M.;Odupitan, T.;Ogawa, M. T.;O'Gorman, T.;Okabayashi, M.;Olney, R.;Omolayo, O.;O'Mullane, M.;Ongena, J.;Orsitto, F.;Orszagh, J.;Oswuigwe, B. I.;Otin, R.;Owen, A.;Paccagnella, R.;Pace, N.;Pacella, D.;Packer, L. W.;Page, A.;Pajuste, E.;Palazzo, S.;Pamela, S.;Panja, S.;Papp, P.;Paprok, R.;Parail, V.;Park, M.;Diaz, F. Parra;Parsons, M.;Pasqualotto, R.;Patel, A.;Pathak, S.;Paton, D.;Patten, H.;Pau, A.;Pawelec, E.;Soldan, C. Paz;Peackoc, A.;Pearson, I. J.;Pehkonen, S. -P.;Peluso, E.;Penot, C.;Pereira, A.;Pereira, R.;Puglia, P. P. Pereira;von Thun, C. Perez;Peruzzo, S.;Peschanyi, S.;Peterka, M.;Petersson, P.;Petravich, G.;Petre, A.;Petrella, N.;Petrzilka, V.;Peysson, Y.;Pfefferle, D.;Philipps, V.;Pillon, M.;Pintsuk, G.;Piovesan, P.;Pires dos Reis, A.;Piron, L.;Pironti, A.;Pisano, F.;Pitts, R.;Pizzo, F.;Plyusnin, V.;Pomaro, N.;Pompilian, O. G.;Pool, P. J.;Popovichev, S.;Porfiri, M. T.;Porosnicu, C.;Porton, M.;Possnert, G.;Potzel, S.;Powell, T.;Pozzi, J.;Prajapati, V.;Prakash, R.;Prestopino, G.;Price, D.;Price, M.;Price, R.;Prior, P.;Proudfoot, R.;Pucella, G.;Puglia, P.;Puiatti, M. E.;Pulley, D.;Purahoo, K.;Puetterich, Th.;Rachlew, E.;Rack, M.;Ragona, R.;Rainford, M. S. J.;Rakha, A.;Ramogida, G.;Ranjan, S.;Rapson, C. J.;Rasmussen, J. J.;Rathod, K.;Ratta, G.;Ratynskaia, S.;Ravera, G.;Rayner, C.;Rebai, M.;Reece, D.;Reed, A.;Refy, D.;Regan, B.;Regana, J.;Reich, M.;Reid, N.;Reimold, F.;Reinhart, M.;Reinke, M.;Reiser, D.;Rendell, D.;Reux, C.;Reyes Cortes, S. D. A.;Reynolds, S.;Riccardo, V.;Richardson, N.;Riddle, K.;Rigamonti, D.;Rimini, F. G.;Risner, J.;Riva, M.;Roach, C.;Robins, R. J.;Robinson, S. A.;Robinson, T.;Robson, D. W.;Roccella, R.;Rodionov, R.;Rodrigues, P.;Rodriguez, J.;Rohde, V.;Romanelli, F.;Romanelli, M.;Romanelli, S.;Romazanov, J.;Rowe, S.;Rubel, M.;Rubinacci, G.;Rubino, G.;Ruchko, L.;Ruiz, M.;Ruset, C.;Rzadkiewicz, J.;Saarelma, S.;Sabot, R.;Safi, E.;Sagar, P.;Saibene, G.;Saint-Laurent, F.;Salewski, M.;Salmi, A.;Salmon, R.;Salzedas, F.;Samaddar, D.;Samm, U.;Sandiford, D.;Santa, P.;Santala, M. I. K.;Santos, B.;Santucci, A.;Sartori, F.;Sartori, R.;Sauter, O.;Scannell, R.;Schlummer, T.;Schmid, K.;Schmidt, V.;Schmuck, S.;Schneider, M.;Schoepf, K.;Schworer, D.;Scott, S. D.;Sergienko, G.;Sertoli, M.;Shabbir, A.;Sharapov, S. E.;Shaw, A.;Shaw, R.;Sheikh, H.;Shepherd, A.;Shevelev, A.;Shumack, A.;Sias, G.;Sibbald, M.;Sieglin, B.;Silburn, S.;Silva, A.;Silva, C.;Simmons, P. A.;Simpson, J.;Simpson-Hutchinson, J.;Sinha, A.;Sipila, S. K.;Sips, A. C. C.;Siren, P.;Sirinelli, A.;Sjostrand, H.;Skiba, M.;Skilton, R.;Slabkowska, K.;Slade, B.;Smith, N.;Smith, P. G.;Smith, R.;Smith, T. J.;Smithies, M.;Snoj, L.;Soare, S.;Solano, E. R.;Somers, A.;Sommariva, C.;Sonato, P.;Sopplesa, A.;Sousa, J.;Sozzi, C.;Spagnolo, S.;Spelzini, T.;Spineanu, F.;Stables, G.;Stamatelatos, I.;Stamp, M. F.;Staniec, P.;Stankunas, G.;Stan-Sion, C.;Stead, M. J.;Stefanikova, E.;Stepanov, I.;Stephen, A. V.;Stephen, M.;Stevens, A.;Stevens, B. D.;Strachan, J.;Strand, P.;Strauss, H. R.;Strom, P.;Stubbs, G.;Studholme, W.;Subba, F.;Summers, H. P.;Svensson, J.;Swiderski, L.;Szabolics, T.;Szawlowski, M.;Szepesi, G.;Suzuki, T. T.;Tal, B.;Tala, T.;Talbot, A. R.;Talebzadeh, S.;Taliercio, C.;Tamain, P.;Tame, C.;Tang, W.;Tardocchi, M.;Taroni, L.;Taylor, D.;Taylor, K. A.;Tegnered, D.;Telesca, G.;Teplova, N.;Terranova, D.;Testa, D.;Tholerus, E.;Thomas, J.;Thomas, J. D.;Thomas, P.;Thompson, A.;Thompson, C. -A.;Thompson, V. K.;Thorne, L.;Thornton, A.;Thrysoe, A. S.;Tigwell, P. A.;Tipton, N.;Tiseanu, I.;Tojo, H.;Tokitani, M.;Tolias, P.;Tomes, M.;Tonner, P.;Towndrow, M.;Trimble, P.;Tripsky, M.;Tsalas, M.;Tsavalas, P.;Jun, D. Tskhakaya;Turner, I.;Turner, M. M.;Turnyanskiy, M.;Tvalashvili, G.;Tyrrell, S. G. J.;Uccello, A.;Ul-Abidin, Z.;Uljanovs, J.;Ulyatt, D.;Urano, H.;Uytdenhouwen, I.;Vadgama, A. P.;Valcarcel, D.;Valentinuzzi, M.;Valisa, M.;Olivares, P. Vallejos;Valovic, M.;Van De Mortel, M.;Van Eester, D.;Van Renterghem, W.;van Rooij, G. J.;Varje, J.;Varoutis, S.;Vartanian, S.;Vasava, K.;Vasilopoulou, T.;Vega, J.;Verdoolaege, G.;Verhoeven, R.;Verona, C.;Rinati, G. Verona;Veshchev, E.;Vianello, N.;Vicente, J.;Viezzer, E.;Villari, S.;Villone, F.;Vincenzi, P.;Vinyar, I.;Viola, B.;Vitins, A.;Vizvary, Z.;Vlad, M.;Voitsekhovitch, I.;Vondracek, P.;Vora, N.;Vu, T.;Pires de Sa, W. W.;Wakeling, B.;Waldon, C. W. F.;Walkden, N.;Walker, M.;Walker, R.;Walsh, M.;Wang, E.;Wang, N.;Warder, S.;Warren, R. J.;Waterhouse, J.;Watkins, N. W.;Watts, C.;Wauters, T.;Weckmann, A.;Weiland, J.;Weisen, H.;Weiszflog, M.;Wellstood, C.;West, A. T.;Wheatley, M. R.;Whetham, S.;Whitehead, A. M.;Whitehead, B. D.;Widdowson, A. M.;Wiesen, S.;Wilkinson, J.;Williams, J.;Williams, M.;Wilson, A. R.;Wilson, D. J.;Wilson, H. R.;Wilson, J.;Wischmeier, M.;Withenshaw, G.;Withycombe, A.;Witts, D. M.;Wood, D.;Wood, R.;Woodley, C.;Wray, S.;Wright, J.;Wright, J. C.;Wu, J.;Wukitch, S.;Wynn, A.;Xu, T.;Yadikin, D.;Yanling, W.;Yao, L.;Yavorskij, V.;Yoo, M. G.;Young, C.;Young, D.;Young, I. D.;Young, R.;Zacks, J.;Zagorski, R.;Zaitsev, F. S.;Zanino, R.;Zarins, A.;Zastrow, K. D.;Zerbini, M.;Zhang, W.;Zhou, Y.;Zilli, E.;Zoita, V.;Zoletnik, S.;Zychor, I.
2017
Abstract
The dynamics for the transition from L-mode to a stationary high QDT H-mode regime in ITER is expected to be qualitatively different to present experiments. Differences may be caused by a low fuelling efficiency of recycling neutrals, that influence the post transition plasma density evolution on the one hand. On the other hand, the effect of the plasma density evolution itself both on the alpha heating power and the edge power flow required to sustain the H-mode confinement itself needs to be considered. This paper presents results of modelling studies of the transition to stationary high QDT H-mode regime in ITER with the JINTRAC suite of codes, which include optimisation of the plasma density evolution to ensure a robust achievement of high QDT regimes in ITER on the one hand and the avoidance of tungsten accumulation in this transient phase on the other hand. As a first step, the JINTRAC integrated models have been validated in fully predictive simulations (excluding core momentum transport which is prescribed) against core, pedestal and divertor plasma measurements in JET C-wall experiments for the transition from L-mode to stationary H-mode in partially ITER relevant conditions (highest achievable current and power, H-98,H-y similar to 1.0, low collisionality, comparable evolution in P-net/PL-H, but different rho(*), T-i/T-e, Mach number and plasma composition compared to ITER expectations). The selection of transport models (core: NCLASS + Bohm/gyroBohm in L-mode/GLF23 in H-mode) was determined by a trade-off between model complexity and efficiency. Good agreement between code predictions and measured plasma parameters is obtained if anomalous heat and particle transport in the edge transport barrier are assumed to be reduced at different rates with increasing edge power flow normalised to the H-mode threshold; in particular the increase in edge plasma density is dominated by this edge transport reduction as the calculated neutral influx across the separatrix remains unchanged (or even slightly decreases) following the H-mode transition. JINTRAC modelling of H-mode transitions for the ITER 15 MA/5.3 T high Q(DT) scenarios with the same modelling assumptions as those being derived from JET experiments has been carried out. The modelling finds that it is possible to access high Q(DT) conditions robustly for additional heating power levels of P-AUX >= 53 MW by optimising core and edge plasma fuelling in the transition from L-mode to high Q(DT) H-mode. An initial period of low plasma density, in which the plasma accesses the H-mode regime and the alpha heating power increases, needs to be considered after the start of the additional heating, which is then followed by a slow density ramp. Both the duration of the low density phase and the density ramp-rate depend on boundary and operational conditions and can be optimised to minimise the resistive flux consumption in this transition phase. The modelling also shows that fuelling schemes optimised for a robust access to high Q(DT) H-mode in ITER are also optimum for the prevention of the contamination of the core plasma by tungsten during this phase.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3357290
Citazioni
ND
24
20
social impact
Conferma cancellazione
Sei sicuro che questo prodotto debba essere cancellato?
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.