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593 results on '"Marandet, Y."'

7. Self‐organization of plasma edge turbulence in interaction with recycling neutrals.

Author

Quadri, V., Tamain, P., Marandet, Y., Bufferand, H., Rivals, N., Ciraolo, G., Falchetto, G., Düll, R., and Yang, H.

Subjects
PLASMA boundary layers, PLASMA oscillations, CONFORMAL geometry, TURBULENCE, PHYSICS, PLASMA turbulence
Abstract

Experimental results from several tokamaks suggest a strong impact of divertor density regimes on turbulent transport in the edge plasma. Reciprocally, the change in transverse transport and SOL width affects the access to density regimes, making it a fundamental topic for heat exhaust issue. Such phenomenology is highly nonlinear and can only be approached quantitatively using numerical simulations treating turbulence and neutrals recycling physics self‐consistently. In this study, the SOLEDGE3X edge multi‐fluid code is used to investigate the mutual interaction between edge plasma turbulence and neutrals recycling. A fluid neutrals model based on the assumption of a charge‐exchange‐dominated plasma‐neutral interaction has been implemented. Two simulations in circular geometry are compared: one without neutrals, where the particle flux is driven by a constant in flux from the core region, and the other one with neutrals recycling included in which the particle input to the system is self‐consistently injected by a gas puff from the midplane. The presence of the neutrals triggers three types of perturbations on the plasma: a local and non‐axisymmetric one driven by the gas puff, a global perturbation affecting both profiles and turbulence properties in the whole domain, and a local one in the vicinity of the limiter where recycling occurs. The largest effect of the inclusion of self‐consistent neutrals recycling is a large‐scale reorganization of the plasma profiles and turbulence properties due to the dissociation of particle and energy fluxes. These effects are expected to be more important at higher densities regimes or in diverted configuration. [ABSTRACT FROM AUTHOR]

Published
2024
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10. Kinetic equations for Stark line shapes

Author

Rosato, J., Capes, H., Marandet, Y., Mekkaoui, A., and Stamm, R.

Subjects
Physics - Plasma Physics
Abstract

The BBGKY formalism is revisited in the framework of plasma spectroscopy. We address the issue of Stark line shape modeling by using kinetic transport equations. In the most simplified treatment of these equations, triple correlations between an emitter and the perturbing charged particles are neglected and a collisional description of Stark effect is obtained. Here we relax this assumption and retain triple correlations using a generalization of the Kirkwood truncature hypothesis to quantum operator. An application to hydrogen lines is done in the context of plasma diagnostic, and indicates that the neglect of triple correlations can lead to a significant overestimate of the line width., Comment: 13 pages, 1 figure

Published
2012
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11. Linear transport in stochastic media. Application to neutral transport in turbulent plasmas

Author

Marandet, Y., Mekkaoui, A., Reiter, D., Boerner, P., Genesio, P., Rosato, J., Capes, H., Catoire, F., Koubiti, M., Godbert-Mouret, L., and Stamm, R.

Subjects
Physics - Plasma Physics
Abstract

This work addresses linear transport in turbulent media, with emphasis on neutral particle (atoms, molecules) transport in magnetized fusion plasmas. A stochastic model for turbulent plasmas, based upon a multivariate Gamma distribution, is presented. The geometry is a 2D slab and turbulence is assumed to be statistically homogeneous. The average neutral density and ionization source, which are the quantities relevant for integrated simulations and diagnostic applications, are calculated analytically in the scattering free case. The boundary conditions and the ratio of the turbulence correlation length to the neutral mean free path are identified as the main control parameters in the problem. The non trivial relationship between the average neutral density and the ionization source is investigated. Monte Carlo calculations including scattering are then presented, and the main trends obtained in the scattering free case are shown to be conserved., Comment: 11 figures

Published
2010

12. Spectral line shape modeling and ion temperature fluctuations in tokamak edge plasmas

Author

Marandet, Y. and Dufty, J. W.

Subjects
Physics - Plasma Physics
Abstract

In this work, we use a passive advection model for ion temperature fluctuations, in order to investigate their effects on Doppler Spectral line shapes. The relevance of the model is discussed in the framework of the Braginskii equations, and the subsequent Probability Density Function evaluation relies on results obtained in neutral fluids. The resulting Doppler line profiles are shown to exhibit characteristic exponential tails., Comment: 6 pages, 2 figures, to be published in Contributions to Plasma Physics

Published
2006
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13. Spectral line shapes in low frequency turbulent tokamak plasmas

Author

Marandet, Y., Capes, H., Godbert-Mouret, L., Koubiti, M., and Stamm, R.

Subjects
Physics - Plasma Physics, Physics - Atomic Physics
Abstract

In this paper we investigate the influence of low frequency turbulence on Doppler spectral line shapes in magnetized plasmas. Low frequency refers here to fluctuations whose typical time scale is much larger than those characterizing the atomic processes, such as radiative decay, collisions and charge exchange. This ordering is in particular relevant for drift wave turbulence, ubiquitous in edge plasmas of fusion devices. Turbulent fluctuations are found to affect line shapes through both the spatial and time averages introduced by the measurement process. The profile is expressed in terms of the fluid fields describing the plasma. Assuming the spectrometer acquisition time to be much larger than the turbulent time scale, an ordering generally fulfilled in experiments, allows to develop a statistical formalism. We proceed by investigating the effects of density, fluid velocity and temperature fluctuations alone on the Doppler profile of a spectral line emitted by a charge exchange population of neutrals. Line wings are found to be affected by ion temperature or fluid velocity fluctuations, and can in some cases exhibit a power-law behavior. This study gives some insights in the appearance of non-Boltzmann statistics, such as Levy statistics, when dealing with averaged experimental data., Comment: 7 figures, submitted to Physical Review E

Published
2004

15. Measurements and controls implementation for WEST

Author

Moreau, P., Bucalossi, J., Missirlian, M., Samaille, F., Courtois, X., Gil, C., Lotte, P., Meyer, O., Nardon, E., Nouailletas, R., Ravenel, N., Travere, J.M., Alarcon, T., Antusch, S., Aumeunier, M.H., Barjat, P., Belsare, S., Bernard, J.M., Bhandarkar, M., Bottereau, C., Bourdelle, C., Brémond, S., Camenen, Y., Chaudhari, V., Chavda, C., Chernyshova, M., Clairet, F., Colnel, J., Czarski, T., Choi, M., Colledani, G., Corre, Y., Daniel, R., Davis, D., Dejarnac, R., Devynck, P., Dhongde, J., Douai, D., Elbeze, D., Escarguel, A., Fenzi, C., Figacz, W., Guangwu, Z., Giacalone, J.C., Guirlet, R., Gunn, J., Hacquin, S., Hao, X., Harris, J.H., Hoang, G.T., Houry, M., Imbeaux, F., Jablonski, S., Jardin, A., Joshi, H., Kasprowicz, G., Klepper, C.C., Kowalska-Strzeciwilk, E., Kubkowska, M., Kumar, A., Kumar, V., Kumari, P., Laqua, H., Le-Luyer, A., Lee, W., Lewerentz, M., Lyu, B., Malard, P., Manenc, L., Mansuri, I., Marandet, Y., Masand, H., Mazon, D., Molina, D., Moureau, G., Nam, Y., Park, H., Pascal, J.Y., Patel, K., Patel, M., Pozniak, K., Radloff, D., Ranjan, S., Rapson, C., Raupp, G., Rieth, M., Sabot, R., Santraine, B., Sestac, D., Sharma, M., Shen, J., Signoret, J., Soni, J., Spring, A., Spuig, P., Sugandhi, R., Treuterrer, W., Tsitrone, E., Varshney, S., Vartanian, S., Volpe, D., Wang, F.D., Werner, A., Yun, G., Zabolotny, W., and Zhao, W.

Published
2017
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18. Overview of the TCV tokamak experimental programme

Author

Reimerdes, H, Agostini, M, Alessi, E, Alberti, S, Andrebe, Y, Arnichand, H, Balbin, J, Bagnato, F, Baquero-Ruiz, M, Bernert, M, Bin, W, Blanchard, P, Blanken, T, Boedo, J, Brida, D, Brunner, S, Bogar, C, Bogar, O, Bolzonella, T, Bombarda, F, Bouquey, F, Bowman, C, Brunetti, D, Buermans, J, Bufferand, H, Calacci, L, Camenen, Y, Carli, S, Carnevale, D, Carpanese, F, Causa, F, Cavalier, J, Cavedon, M, Cazabonne, J, Cerovsky, J, Chandra, R, Chandrarajan Jayalekshmi, A, Chellai, O, Chmielewski, P, Choi, D, Ciraolo, G, Classen, I, Coda, S, Colandrea, C, Dal Molin, A, David, P, De Baar, M, Decker, J, Dekeyser, W, De Oliveira, H, Douai, D, Dreval, M, Dunne, M, Duval, B, Elmore, S, Embreus, O, Eriksson, F, Faitsch, M, Falchetto, G, Farnik, M, Fasoli, A, Fedorczak, N, Felici, F, Fevrier, O, Ficker, O, Fil, A, Fontana, M, Fransson, E, Frassinetti, L, Furno, I, Gahle, D, Galassi, D, Galazka, K, Galperti, C, Garavaglia, S, Garcia-Munoz, M, Geiger, B, Giacomin, M, Giruzzi, G, Gobbin, M, Golfinopoulos, T, Goodman, T, Gorno, S, Granucci, G, Graves, J, Griener, M, Gruca, M, Gyergyek, T, Haelterman, R, Hakola, A, Han, W, Happel, T, Harrer, G, Harrison, J, Henderson, S, Hogeweij, G, Hogge, J, Hoppe, M, Horacek, J, Huang, Z, Iantchenko, A, Innocente, P, Insulander Bjork, K, Ionita-Schrittweiser, C, Isliker, H, Jardin, A, Jaspers, R, Karimov, R, Karpushov, A, Kazakov, Y, Komm, M, Kong, M, Kovacic, J, Krutkin, O, Kudlacek, O, Kumar, U, Kwiatkowski, R, Labit, B, Laguardia, L, Lammers, J, Laribi, E, Laszynska, E, Lazaros, A, Linder, O, Linehan, B, Lipschultz, B, Llobet, X, Loizu, J, Lunt, T, Macusova, E, Marandet, Y, Maraschek, M, Marceca, G, Marchetto, C, Marchioni, S, Marmar, E, Martin, Y, Martinelli, L, Matos, F, Maurizio, R, Mayoral, M, Mazon, D, Menkovski, V, Merle, A, Merlo, G, Meyer, H, Mikszuta-Michalik, K, Molina Cabrera, P, Morales, J, Moret, J, Moro, A, Moulton, D, Muhammed, H, Myatra, O, Mykytchuk, D, Napoli, F, Nem, R, Nielsen, A, Nocente, M, Nowak, S, Offeddu, N, Olsen, J, Orsitto, F, Pan, O, Papp, G, Pau, A, Perek, A, Pesamosca, F, Peysson, Y, Pigatto, L, Piron, C, Poradzinski, M, Porte, L, Putterich, T, Rabinski, M, Raj, H, Rasmussen, J, Ratta, G, Ravensbergen, T, Ricci, D, Ricci, P, Rispoli, N, Riva, F, Rivero-Rodriguez, J, Salewski, M, Sauter, O, Schmidt, B, Schrittweiser, R, Sharapov, S, Sheikh, U, Sieglin, B, Silva, M, Smolders, A, Snicker, A, Sozzi, C, Spolaore, M, Stagni, A, Stipani, L, Sun, G, Tala, T, Tamain, P, Tanaka, K, Tema Biwole, A, Terranova, D, Terry, J, Testa, D, Theiler, C, Thornton, A, Thrysoe, A, Torreblanca, H, Tsui, C, Vaccaro, D, Vallar, M, Van Berkel, M, Van Eester, D, Van Kampen, R, Van Mulders, S, Verhaegh, K, Verhaeghe, T, Vianello, N, Villone, F, Viezzer, E, Vincent, B, Voitsekhovitch, I, Vu, N, Walkden, N, Wauters, T, Weisen, H, Wendler, N, Wensing, M, Widmer, F, Wiesen, S, Wischmeier, M, Wijkamp, T, Wunderlich, D, Wuthrich, C, Yanovskiy, V, Zebrowski, J, Reimerdes H., Agostini M., Alessi E., Alberti S., Andrebe Y., Arnichand H., Balbin J., Bagnato F., Baquero-Ruiz M., Bernert M., Bin W., Blanchard P., Blanken T. C., Boedo J. A., Brida D., Brunner S., Bogar C., Bogar O., Bolzonella T., Bombarda F., Bouquey F., Bowman C., Brunetti D., Buermans J., Bufferand H., Calacci L., Camenen Y., Carli S., Carnevale D., Carpanese F., Causa F., Cavalier J., Cavedon M., Cazabonne J. A., Cerovsky J., Chandra R., Chandrarajan Jayalekshmi A., Chellai O., Chmielewski P., Choi D., Ciraolo G., Classen I. G. J., Coda S., Colandrea C., Dal Molin A., David P., De Baar M. R., Decker J., Dekeyser W., De Oliveira H., Douai D., Dreval M., Dunne M. G., Duval B. P., Elmore S., Embreus O., Eriksson F., Faitsch M., Falchetto G., Farnik M., Fasoli A., Fedorczak N., Felici F., Fevrier O., Ficker O., Fil A., Fontana M., Fransson E., Frassinetti L., Furno I., Gahle D. S., Galassi D., Galazka K., Galperti C., Garavaglia S., Garcia-Munoz M., Geiger B., Giacomin M., Giruzzi G., Gobbin M., Golfinopoulos T., Goodman T., Gorno S., Granucci G., Graves J. P., Griener M., Gruca M., Gyergyek T., Haelterman R., Hakola A., Han W., Happel T., Harrer G., Harrison J. R., Henderson S., Hogeweij G. M. D., Hogge J. -P., Hoppe M., Horacek J., Huang Z., Iantchenko A., Innocente P., Insulander Bjork K., Ionita-Schrittweiser C., Isliker H., Jardin A., Jaspers R. J. E., Karimov R., Karpushov A. N., Kazakov Y., Komm M., Kong M., Kovacic J., Krutkin O., Kudlacek O., Kumar U., Kwiatkowski R., Labit B., Laguardia L., Lammers J. T., Laribi E., Laszynska E., Lazaros A., Linder O., Linehan B., Lipschultz B., Llobet X., Loizu J., Lunt T., Macusova E., Marandet Y., Maraschek M., Marceca G., Marchetto C., Marchioni S., Marmar E. S., Martin Y., Martinelli L., Matos F., Maurizio R., Mayoral M. -L., Mazon D., Menkovski V., Merle A., Merlo G., Meyer H., Mikszuta-Michalik K., Molina Cabrera P. A., Morales J., Moret J. -M., Moro A., Moulton D., Muhammed H., Myatra O., Mykytchuk D., Napoli F., Nem R. D., Nielsen A. H., Nocente M., Nowak S., Offeddu N., Olsen J., Orsitto F. P., Pan O., Papp G., Pau A., Perek A., Pesamosca F., Peysson Y., Pigatto L., Piron C., Poradzinski M., Porte L., Putterich T., Rabinski M., Raj H., Rasmussen J. J., Ratta G. A., Ravensbergen T., Ricci D., Ricci P., Rispoli N., Riva F., Rivero-Rodriguez J. F., Salewski M., Sauter O., Schmidt B. S., Schrittweiser R., Sharapov S., Sheikh U. A., Sieglin B., Silva M., Smolders A., Snicker A., Sozzi C., Spolaore M., Stagni A., Stipani L., Sun G., Tala T., Tamain P., Tanaka K., Tema Biwole A., Terranova D., Terry J. L., Testa D., Theiler C., Thornton A., Thrysoe A., Torreblanca H., Tsui C. K., Vaccaro D., Vallar M., Van Berkel M., Van Eester D., Van Kampen R. J. R., Van Mulders S., Verhaegh K., Verhaeghe T., Vianello N., Villone F., Viezzer E., Vincent B., Voitsekhovitch I., Vu N. M. T., Walkden N., Wauters T., Weisen H., Wendler N., Wensing M., Widmer F., Wiesen S., Wischmeier M., Wijkamp T. A., Wunderlich D., Wuthrich C., Yanovskiy V., Zebrowski J., Reimerdes, H, Agostini, M, Alessi, E, Alberti, S, Andrebe, Y, Arnichand, H, Balbin, J, Bagnato, F, Baquero-Ruiz, M, Bernert, M, Bin, W, Blanchard, P, Blanken, T, Boedo, J, Brida, D, Brunner, S, Bogar, C, Bogar, O, Bolzonella, T, Bombarda, F, Bouquey, F, Bowman, C, Brunetti, D, Buermans, J, Bufferand, H, Calacci, L, Camenen, Y, Carli, S, Carnevale, D, Carpanese, F, Causa, F, Cavalier, J, Cavedon, M, Cazabonne, J, Cerovsky, J, Chandra, R, Chandrarajan Jayalekshmi, A, Chellai, O, Chmielewski, P, Choi, D, Ciraolo, G, Classen, I, Coda, S, Colandrea, C, Dal Molin, A, David, P, De Baar, M, Decker, J, Dekeyser, W, De Oliveira, H, Douai, D, Dreval, M, Dunne, M, Duval, B, Elmore, S, Embreus, O, Eriksson, F, Faitsch, M, Falchetto, G, Farnik, M, Fasoli, A, Fedorczak, N, Felici, F, Fevrier, O, Ficker, O, Fil, A, Fontana, M, Fransson, E, Frassinetti, L, Furno, I, Gahle, D, Galassi, D, Galazka, K, Galperti, C, Garavaglia, S, Garcia-Munoz, M, Geiger, B, Giacomin, M, Giruzzi, G, Gobbin, M, Golfinopoulos, T, Goodman, T, Gorno, S, Granucci, G, Graves, J, Griener, M, Gruca, M, Gyergyek, T, Haelterman, R, Hakola, A, Han, W, Happel, T, Harrer, G, Harrison, J, Henderson, S, Hogeweij, G, Hogge, J, Hoppe, M, Horacek, J, Huang, Z, Iantchenko, A, Innocente, P, Insulander Bjork, K, Ionita-Schrittweiser, C, Isliker, H, Jardin, A, Jaspers, R, Karimov, R, Karpushov, A, Kazakov, Y, Komm, M, Kong, M, Kovacic, J, Krutkin, O, Kudlacek, O, Kumar, U, Kwiatkowski, R, Labit, B, Laguardia, L, Lammers, J, Laribi, E, Laszynska, E, Lazaros, A, Linder, O, Linehan, B, Lipschultz, B, Llobet, X, Loizu, J, Lunt, T, Macusova, E, Marandet, Y, Maraschek, M, Marceca, G, Marchetto, C, Marchioni, S, Marmar, E, Martin, Y, Martinelli, L, Matos, F, Maurizio, R, Mayoral, M, Mazon, D, Menkovski, V, Merle, A, Merlo, G, Meyer, H, Mikszuta-Michalik, K, Molina Cabrera, P, Morales, J, Moret, J, Moro, A, Moulton, D, Muhammed, H, Myatra, O, Mykytchuk, D, Napoli, F, Nem, R, Nielsen, A, Nocente, M, Nowak, S, Offeddu, N, Olsen, J, Orsitto, F, Pan, O, Papp, G, Pau, A, Perek, A, Pesamosca, F, Peysson, Y, Pigatto, L, Piron, C, Poradzinski, M, Porte, L, Putterich, T, Rabinski, M, Raj, H, Rasmussen, J, Ratta, G, Ravensbergen, T, Ricci, D, Ricci, P, Rispoli, N, Riva, F, Rivero-Rodriguez, J, Salewski, M, Sauter, O, Schmidt, B, Schrittweiser, R, Sharapov, S, Sheikh, U, Sieglin, B, Silva, M, Smolders, A, Snicker, A, Sozzi, C, Spolaore, M, Stagni, A, Stipani, L, Sun, G, Tala, T, Tamain, P, Tanaka, K, Tema Biwole, A, Terranova, D, Terry, J, Testa, D, Theiler, C, Thornton, A, Thrysoe, A, Torreblanca, H, Tsui, C, Vaccaro, D, Vallar, M, Van Berkel, M, Van Eester, D, Van Kampen, R, Van Mulders, S, Verhaegh, K, Verhaeghe, T, Vianello, N, Villone, F, Viezzer, E, Vincent, B, Voitsekhovitch, I, Vu, N, Walkden, N, Wauters, T, Weisen, H, Wendler, N, Wensing, M, Widmer, F, Wiesen, S, Wischmeier, M, Wijkamp, T, Wunderlich, D, Wuthrich, C, Yanovskiy, V, Zebrowski, J, Reimerdes H., Agostini M., Alessi E., Alberti S., Andrebe Y., Arnichand H., Balbin J., Bagnato F., Baquero-Ruiz M., Bernert M., Bin W., Blanchard P., Blanken T. C., Boedo J. A., Brida D., Brunner S., Bogar C., Bogar O., Bolzonella T., Bombarda F., Bouquey F., Bowman C., Brunetti D., Buermans J., Bufferand H., Calacci L., Camenen Y., Carli S., Carnevale D., Carpanese F., Causa F., Cavalier J., Cavedon M., Cazabonne J. A., Cerovsky J., Chandra R., Chandrarajan Jayalekshmi A., Chellai O., Chmielewski P., Choi D., Ciraolo G., Classen I. G. J., Coda S., Colandrea C., Dal Molin A., David P., De Baar M. R., Decker J., Dekeyser W., De Oliveira H., Douai D., Dreval M., Dunne M. G., Duval B. P., Elmore S., Embreus O., Eriksson F., Faitsch M., Falchetto G., Farnik M., Fasoli A., Fedorczak N., Felici F., Fevrier O., Ficker O., Fil A., Fontana M., Fransson E., Frassinetti L., Furno I., Gahle D. S., Galassi D., Galazka K., Galperti C., Garavaglia S., Garcia-Munoz M., Geiger B., Giacomin M., Giruzzi G., Gobbin M., Golfinopoulos T., Goodman T., Gorno S., Granucci G., Graves J. P., Griener M., Gruca M., Gyergyek T., Haelterman R., Hakola A., Han W., Happel T., Harrer G., Harrison J. R., Henderson S., Hogeweij G. M. D., Hogge J. -P., Hoppe M., Horacek J., Huang Z., Iantchenko A., Innocente P., Insulander Bjork K., Ionita-Schrittweiser C., Isliker H., Jardin A., Jaspers R. J. E., Karimov R., Karpushov A. N., Kazakov Y., Komm M., Kong M., Kovacic J., Krutkin O., Kudlacek O., Kumar U., Kwiatkowski R., Labit B., Laguardia L., Lammers J. T., Laribi E., Laszynska E., Lazaros A., Linder O., Linehan B., Lipschultz B., Llobet X., Loizu J., Lunt T., Macusova E., Marandet Y., Maraschek M., Marceca G., Marchetto C., Marchioni S., Marmar E. S., Martin Y., Martinelli L., Matos F., Maurizio R., Mayoral M. -L., Mazon D., Menkovski V., Merle A., Merlo G., Meyer H., Mikszuta-Michalik K., Molina Cabrera P. A., Morales J., Moret J. -M., Moro A., Moulton D., Muhammed H., Myatra O., Mykytchuk D., Napoli F., Nem R. D., Nielsen A. H., Nocente M., Nowak S., Offeddu N., Olsen J., Orsitto F. P., Pan O., Papp G., Pau A., Perek A., Pesamosca F., Peysson Y., Pigatto L., Piron C., Poradzinski M., Porte L., Putterich T., Rabinski M., Raj H., Rasmussen J. J., Ratta G. A., Ravensbergen T., Ricci D., Ricci P., Rispoli N., Riva F., Rivero-Rodriguez J. F., Salewski M., Sauter O., Schmidt B. S., Schrittweiser R., Sharapov S., Sheikh U. A., Sieglin B., Silva M., Smolders A., Snicker A., Sozzi C., Spolaore M., Stagni A., Stipani L., Sun G., Tala T., Tamain P., Tanaka K., Tema Biwole A., Terranova D., Terry J. L., Testa D., Theiler C., Thornton A., Thrysoe A., Torreblanca H., Tsui C. K., Vaccaro D., Vallar M., Van Berkel M., Van Eester D., Van Kampen R. J. R., Van Mulders S., Verhaegh K., Verhaeghe T., Vianello N., Villone F., Viezzer E., Vincent B., Voitsekhovitch I., Vu N. M. T., Walkden N., Wauters T., Weisen H., Wendler N., Wensing M., Widmer F., Wiesen S., Wischmeier M., Wijkamp T. A., Wunderlich D., Wuthrich C., Yanovskiy V., and Zebrowski J.

Abstract

The tokamak à configuration variable (TCV) continues to leverage its unique shaping capabilities, flexible heating systems and modern control system to address critical issues in preparation for ITER and a fusion power plant. For the 2019-20 campaign its configurational flexibility has been enhanced with the installation of removable divertor gas baffles, its diagnostic capabilities with an extensive set of upgrades and its heating systems with new dual frequency gyrotrons. The gas baffles reduce coupling between the divertor and the main chamber and allow for detailed investigations on the role of fuelling in general and, together with upgraded boundary diagnostics, test divertor and edge models in particular. The increased heating capabilities broaden the operational regime to include Te/Ti ∼1 and have stimulated refocussing studies from L-mode to H-mode across a range of research topics. ITER baseline parameters were reached in type-I ELMy H-modes and alternative regimes with 'small' (or no) ELMs explored. Most prominently, negative triangularity was investigated in detail and confirmed as an attractive scenario with H-mode level core confinement but an L-mode edge. Emphasis was also placed on control, where an increased number of observers, actuators and control solutions became available and are now integrated into a generic control framework as will be needed in future devices. The quantity and quality of results of the 2019-20 TCV campaign are a testament to its successful integration within the European research effort alongside a vibrant domestic programme and international collaborations.

Published
2022

31. Characterizing W sources in the all-W wall, all-RF WEST tokamak environment * , **

Author

Klepper, C C, primary, Unterberg, E A, additional, Marandet, Y, additional, Curreli, D, additional, Grosjean, A, additional, Harris, J H, additional, Johnson, C A, additional, Gallo, A, additional, Goniche, M, additional, Guillemaut, Ch, additional, Gunn, J P, additional, Raghunathan, M, additional, Tsitrone, E, additional, Ciraolo, G, additional, Colas, L, additional, Donovan, D, additional, Ekedahl, A, additional, Easley, D, additional, and Urbanczyk, G, additional

Published
2022
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32. Fluid, kinetic and hybrid approaches for neutral and trace ion edge transport modelling in fusion devices

Author

Borodin, D.V., primary, Schluck, F., additional, Wiesen, S., additional, Harting, D., additional, Börner, P., additional, Brezinsek, S., additional, Dekeyser, W., additional, Carli, S., additional, Blommaert, M., additional, Van Uytven, W., additional, Baelmans, M., additional, Mortier, B., additional, Samaey, G., additional, Marandet, Y., additional, Genesio, P., additional, Bufferand, H., additional, Westerhof, E., additional, Gonzalez, J., additional, Groth, M., additional, Holm, A., additional, Horsten, N., additional, and Leggate, H.J., additional

Published
2022
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38. Deuterium inventory in Tore Supra: Coupled carbon–deuterium balance

Author

Pégourié, B., Panayotis, S., Languille, P., Martin, C., Dittmar, T., Gauthier, E., Hatchressian, J.-C., Pascal, J.-Y., Roubin, P., Ruffe, R., Tsitrone, E., Vartanian, S., Wang, H., Beauté, A., Bouvet, J., Brosset, C., Bucalossi, J., Cabié, M., Caprin, E., Courtois, X., Dachicourt, R., Delchambre, E., Dominici, C., Douai, D., Ekedahl, A., Gunn, J.P., Hakola, A., Jacob, W., Khodja, H., Likonen, J., Linez, F., Litnovsky, A., Marandet, Y., Markelj, S., Martinez, A., Mayer, M., Meyer, O., Monier-Garbet, P., Moreau, P., Negrier, V., Oddon, P., Pardanaud, C., Pasquet, B., Pelicon, P., Petersson, P., Philipps, V., Possnert, G., Reiter, D., Roth, J., Roure, I., Rubel, M., Saint-Laurent, F., Samaille, F., and Vavpetič, P.

Published
2013
Full Text
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39. SOL modelling of the JT-60SA tokamak initial operational scenario using SOLEDGE-EIRENE code

Author

Gał Ązka, K., Balbinot, L., Falchetto, G., Rivals, N., Tamain, P., Marandet, Y., Bufferand, H., Innocente, P., Ciraolo, G., Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), IPPLM Institute of Plasma Physics and Laser Microfusion, 23 Hery Str., 01-497 Warsaw, Poland, Ricerca Formazione Innovazione (Consorzio RFX), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Aix Marseille Université (AMU), EUROfusion Consortium, European Project: 101052200,Implementation of activities described in the Roadmap to Fusion during Horizon Europe through a joint programme of the members of the EUROfusion consortium,EUROfusion, icard, valerie, EUROfusion - EUROfusion - - Implementation of activities described in the Roadmap to Fusion during Horizon Europe through a joint programme of the members of the EUROfusion consortium0000-00-00 - 0000-00-00 - 101052200 - VALID, Physique des interactions ioniques et moléculaires (PIIM), and Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)

Subjects
SOLEDGE3X-EIRENE, SOL, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], JT-60SA, tokamak, Scrape-off layer plasma
Abstract

International audience; The main aim of this work is to assess the realistic heat loads on the first wall of the JT-60SA tokamak. To achieve this scope, for the first time the entire chamber and thesubdivertor region is modeled by the fluid transport code SOLEDGE3X-EIRENE [1]. Whereas the full power scenario #2 modeling was reported elsewhere [2] here wefocus on scenario #2 initial phase with carbon divertor and limited heating power Paux, which is the main scanned parameter. Standard computational mesh with pumpssituated next to the strike points (STD) is compared with full chamber + subdivertor mesh (SUBD)

Published
2022

40. Tungsten sources and core contamination in WEST plasmas: from experiments to simulations

Author

Fedorczak, N, Di Genova, S, Guillemaut, C, Guirlet, R, Cappelli, L, Gallo, A, Colas, L, Romazanov, J, Brezinsek, S, Marandet, Y, Bufferand, H, Yang, H, Ciraolo, G, Serre, E, Unterberg, E, Klepper, C, Johnson, C, Donovan, D, Kosslow, S, Maker, J, Grosjean, A, Tsitrone, E, Bucalossi, J, CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), Aix Marseille Université (AMU), Forschungszentrum Jülich GmbH, Physique des interactions ioniques et moléculaires (PIIM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), CEA- Saclay (CEA), Laboratoire de Mécanique, Modélisation et Procédés Propres (M2P2), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Oak Ridge National Laboratory [Oak Ridge] (ORNL), UT-Battelle, LLC, The University of Tennessee [Knoxville], and icard, valerie

Subjects
[PHYS]Physics [physics], [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS] Physics [physics]
Abstract

International audience

Published
2022

41. First wall fluxes in ITER from full vessel edge-plasma simulations

Author

Rivals, Nicolas, Tamain, Patrick, Marandet, Y, Bonnin, X., Bufferand, Hugo, Falchetto, G., Yang, Hao, Ciraolo, Guido, Pitts, R.A., CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), Aix Marseille Université (AMU), ITER organization (ITER), and icard, valerie

Subjects
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph]
Abstract

International audience

Published
2022

42. Impact of leakage under divertor baffle on detachment onset in WEST

Author

Yang, H, Ciraolo, G, Bucalossi, J, Bufferand, H, Fedorczak, N, Tamain, P, Falchetto, G, Rivals, N, Gunn, J, Marandet, Y, Pégourié, B, Vartanian, S, Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)

Subjects
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph]
Published
2022

43. Overview of the TCV tokamak experimental programme

Author

Reimerdes, H., Agostini, M., Alessi, E., Alberti, S., Andrebe, Y., Arnichand, H., Balbin, J., Bagnato, F., Baquero-Ruiz, M., Bernert, M., Bin, W., Blanchard, P., Blanken, T. C., Boedo, J. A., Brida, D., Brunner, S., Bogar, C., Bogar, O., Bolzonella, T., Bombarda, F., Bouquey, F., Bowman, C., Brunetti, D., Buermans, J., Bufferand, H., Calacci, L., Camenen, Y., Carli, S., Carnevale, D., Carpanese, F., Causa, F., Cavalier, J., Cavedon, M., Cazabonne, J. A., Cerovsky, J., Chandra, R., Chandrarajan Jayalekshmi, A., Chellaï, O., Chmielewski, P., Choi, D., Ciraolo, G., Classen, I.G.J., Coda, S., Colandrea, C., Dal Molin, A., David, P., de Baar, M.R., Decker, J., Dekeyser, W., De Oliveira, H., Douai, D., Dreval, M., Dunne, M. G., Duval, B. P., Elmore, S., Embreus, O., Eriksson, F., Faitsch, M., Falchetto, G., Farnik, M., Fasoli, A., Fedorczak, N., Felici, F., Février, O., Ficker, O., Fil, A., Fontana, M., Fransson, E., Frassinetti, L., Furno, I., Gahle, D. S., Galassi, D., Galazka, K., Galperti, C., Garavaglia, S., Garcia-Munoz, M., Geiger, B., Giacomin, M., Giruzzi, G., Gobbin, M., Golfinopoulos, T., Goodman, T., Gorno, S., Granucci, G., Graves, J. P., Griener, M., Gruca, M., Gyergyek, T., Haelterman, R., Hakola, A., Han, W., Happel, T., Harrer, G., Harrison, J. R., Henderson, S., Hogeweij, G. M.D., Hogge, J. P., Hoppe, M., Horacek, J., Huang, Z., Iantchenko, A., Innocente, P., Insulander Björk, K., Ionita-Schrittweiser, C., Isliker, H., Jardin, A., Jaspers, R.J.E., Karimov, R., Karpushov, A. N., Kazakov, Y., Komm, M., Kong, M., Kovacic, J., Krutkin, O., Kudlacek, O., Kumar, U., Kwiatkowski, R., Labit, B., Laguardia, L., Lammers, J.T., Laribi, E., Laszynska, E., Lazaros, A., Linder, O., Linehan, B., Lipschultz, B., Llobet, X., Loizu, J., Lunt, T., Macusova, E., Marandet, Y., Maraschek, M., Marceca, G., Marchetto, C., Marchioni, S., Marmar, E. S., Martin, Y., Martinelli, L., Matos, F., Maurizio, R., Mayoral, M. L., Mazon, D., Menkovski, V., Merle, A., Merlo, G., Meyer, H., Mikszuta-Michalik, K., Molina Cabrera, P. A., Morales, J., Moret, J. M., Moro, A., Moulton, D., Muhammed, H., Myatra, O., Mykytchuk, D., Napoli, F., Nem, R.D., Nielsen, A. H., Nocente, M., Nowak, S., Offeddu, N., Olsen, J., Orsitto, F. P., Pan, O., Papp, G., Pau, A., Perek, A., Pesamosca, F., Peysson, Y., Pigatto, L., Piron, C., Poradzinski, M., Porte, L., Pütterich, T., Rabinski, M., Raj, H., Rasmussen, J. J., Rattá, G. A., Ravensbergen, T., Ricci, D., Ricci, P., Rispoli, N., Riva, F., Rivero-Rodriguez, J. F., Salewski, M., Sauter, O., Schmidt, B. S., Schrittweiser, R., Sharapov, S., Sheikh, U. A., Sieglin, B., Silva, M., Smolders, A., Snicker, A., Sozzi, C., Spolaore, M., Stagni, A., Stipani, L., Sun, G., Tala, T., Tamain, P., Tanaka, K., Tema Biwole, A., Terranova, D., Terry, J. L., Testa, D., Theiler, C., Thornton, A., Thrysøe, A., Torreblanca, H., Tsui, C. K., Vaccaro, D., Vallar, M., van Berkel, M., Van Eester, D., van Kampen, R.J.R., van Mulders, S., Verhaegh, K., Verhaeghe, T., Vianello, N., Villone, F., Viezzer, E., Vincent, B., Voitsekhovitch, I., Vu, N. M.T., Walkden, N., Wauters, T., Weisen, H., Wendler, N., Wensing, M., Widmer, F., Wiesen, S., Wischmeier, M., Wijkamp, T.A., Wünderlich, D., Wüthrich, C., Yanovskiy, V., Zebrowski, J., Reimerdes, H., Agostini, M., Alessi, E., Alberti, S., Andrebe, Y., Arnichand, H., Balbin, J., Bagnato, F., Baquero-Ruiz, M., Bernert, M., Bin, W., Blanchard, P., Blanken, T. C., Boedo, J. A., Brida, D., Brunner, S., Bogar, C., Bogar, O., Bolzonella, T., Bombarda, F., Bouquey, F., Bowman, C., Brunetti, D., Buermans, J., Bufferand, H., Calacci, L., Camenen, Y., Carli, S., Carnevale, D., Carpanese, F., Causa, F., Cavalier, J., Cavedon, M., Cazabonne, J. A., Cerovsky, J., Chandra, R., Chandrarajan Jayalekshmi, A., Chellaï, O., Chmielewski, P., Choi, D., Ciraolo, G., Classen, I.G.J., Coda, S., Colandrea, C., Dal Molin, A., David, P., de Baar, M.R., Decker, J., Dekeyser, W., De Oliveira, H., Douai, D., Dreval, M., Dunne, M. G., Duval, B. P., Elmore, S., Embreus, O., Eriksson, F., Faitsch, M., Falchetto, G., Farnik, M., Fasoli, A., Fedorczak, N., Felici, F., Février, O., Ficker, O., Fil, A., Fontana, M., Fransson, E., Frassinetti, L., Furno, I., Gahle, D. S., Galassi, D., Galazka, K., Galperti, C., Garavaglia, S., Garcia-Munoz, M., Geiger, B., Giacomin, M., Giruzzi, G., Gobbin, M., Golfinopoulos, T., Goodman, T., Gorno, S., Granucci, G., Graves, J. P., Griener, M., Gruca, M., Gyergyek, T., Haelterman, R., Hakola, A., Han, W., Happel, T., Harrer, G., Harrison, J. R., Henderson, S., Hogeweij, G. M.D., Hogge, J. P., Hoppe, M., Horacek, J., Huang, Z., Iantchenko, A., Innocente, P., Insulander Björk, K., Ionita-Schrittweiser, C., Isliker, H., Jardin, A., Jaspers, R.J.E., Karimov, R., Karpushov, A. N., Kazakov, Y., Komm, M., Kong, M., Kovacic, J., Krutkin, O., Kudlacek, O., Kumar, U., Kwiatkowski, R., Labit, B., Laguardia, L., Lammers, J.T., Laribi, E., Laszynska, E., Lazaros, A., Linder, O., Linehan, B., Lipschultz, B., Llobet, X., Loizu, J., Lunt, T., Macusova, E., Marandet, Y., Maraschek, M., Marceca, G., Marchetto, C., Marchioni, S., Marmar, E. S., Martin, Y., Martinelli, L., Matos, F., Maurizio, R., Mayoral, M. L., Mazon, D., Menkovski, V., Merle, A., Merlo, G., Meyer, H., Mikszuta-Michalik, K., Molina Cabrera, P. A., Morales, J., Moret, J. M., Moro, A., Moulton, D., Muhammed, H., Myatra, O., Mykytchuk, D., Napoli, F., Nem, R.D., Nielsen, A. H., Nocente, M., Nowak, S., Offeddu, N., Olsen, J., Orsitto, F. P., Pan, O., Papp, G., Pau, A., Perek, A., Pesamosca, F., Peysson, Y., Pigatto, L., Piron, C., Poradzinski, M., Porte, L., Pütterich, T., Rabinski, M., Raj, H., Rasmussen, J. J., Rattá, G. A., Ravensbergen, T., Ricci, D., Ricci, P., Rispoli, N., Riva, F., Rivero-Rodriguez, J. F., Salewski, M., Sauter, O., Schmidt, B. S., Schrittweiser, R., Sharapov, S., Sheikh, U. A., Sieglin, B., Silva, M., Smolders, A., Snicker, A., Sozzi, C., Spolaore, M., Stagni, A., Stipani, L., Sun, G., Tala, T., Tamain, P., Tanaka, K., Tema Biwole, A., Terranova, D., Terry, J. L., Testa, D., Theiler, C., Thornton, A., Thrysøe, A., Torreblanca, H., Tsui, C. K., Vaccaro, D., Vallar, M., van Berkel, M., Van Eester, D., van Kampen, R.J.R., van Mulders, S., Verhaegh, K., Verhaeghe, T., Vianello, N., Villone, F., Viezzer, E., Vincent, B., Voitsekhovitch, I., Vu, N. M.T., Walkden, N., Wauters, T., Weisen, H., Wendler, N., Wensing, M., Widmer, F., Wiesen, S., Wischmeier, M., Wijkamp, T.A., Wünderlich, D., Wüthrich, C., Yanovskiy, V., and Zebrowski, J.

Abstract

The tokamak à configuration variable (TCV) continues to leverage its unique shaping capabilities, flexible heating systems and modern control system to address critical issues in preparation for ITER and a fusion power plant. For the 2019-20 campaign its configurational flexibility has been enhanced with the installation of removable divertor gas baffles, its diagnostic capabilities with an extensive set of upgrades and its heating systems with new dual frequency gyrotrons. The gas baffles reduce coupling between the divertor and the main chamber and allow for detailed investigations on the role of fuelling in general and, together with upgraded boundary diagnostics, test divertor and edge models in particular. The increased heating capabilities broaden the operational regime to include Te/Ti ∼1 and have stimulated refocussing studies from L-mode to H-mode across a range of research topics. ITER baseline parameters were reached in type-I ELMy H-modes and alternative regimes with 'small' (or no) ELMs explored. Most prominently, negative triangularity was investigated in detail and confirmed as an attractive scenario with H-mode level core confinement but an L-mode edge. Emphasis was also placed on control, where an increased number of observers, actuators and control solutions became available and are now integrated into a generic control framework as will be needed in future devices. The quantity and quality of results of the 2019-20 TCV campaign are a testament to its successful integration within the European research effort alongside a vibrant domestic programme and international collaborations.

Published
2022

45. Advanced spatially hybrid fluid‐kinetic modelling of plasma‐edge neutrals and application to <scp>ITER</scp> case using <scp>SOLPS‐ITER</scp>

Author

Van Uytven, W., Dekeyser, W., Blommaert, M., Horsten, N., Marandet, Y., Baelmans, M., KU Leuven, Department of Applied Physics, Aix-Marseille Université, Aalto-yliopisto, and Aalto University

Subjects
Science & Technology, Physics, Fluids & Plasmas, plasma-edge, Physics, ITER, Physical Sciences, neutral molecules, Condensed Matter Physics, hybrid fluid-kinetic neutrals, SOLPS-ITER
Abstract

openaire: EC/H2020/633053/EU//EUROfusion Funding Information: The first author is funded by a PhD fellowship of the Research Foundation—Flanders. This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 and 2019–2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. The computational resources and services used in this work were provided by the VSC (Flemish Supercomputer Centre), funded by the Research Foundation Flanders (FWO), and the Flemish Government—department EWI. 1 Publisher Copyright: © 2022 Wiley-VCH GmbH. A spatially hybrid fluid-kinetic approach for the efficient simulation of plasma-edge neutrals is extended with a kinetic-fluid condensation process and an automated approach to select a fluid or kinetic treatment at each point along the divertor targets. With the proposed hybrid fluid-kinetic methods, the dominant charge–exchange reaction can be largely removed from the kinetic neutral simulation. The hybrid methods achieve quantitative agreement with the standard kinetic approach, with relative errors on the peak target plasma density and peak target ion flux density of 5–30%, while the Central Processing Unit (CPU) time for the kinetic neutral solver is reduced by a factor 3–6.

Published
2022
Full Text
View/download PDF

46. Overview of the TCV tokamak experimental programme

Author

Reimerdes, H. Agostini, M. Alessi, E. Alberti, S. and Andrebe, Y. Arnichand, H. Balbin, J. Bagnato, F. and Baquero-Ruiz, M. Bernert, M. Bin, W. Blanchard, P. and Blanken, T. C. Boedo, J. A. Brida, D. Brunner, S. Bogar, C. Bogar, O. Bolzonella, T. Bombarda, F. Bouquey, F. and Bowman, C. Brunetti, D. Buermans, J. Bufferand, H. and Calacci, L. Camenen, Y. Carli, S. Carnevale, D. and Carpanese, F. Causa, F. Cavalier, J. Cavedon, M. and Cazabonne, J. A. Cerovsky, J. Chandra, R. Jayalekshmi, A. Chandrarajan Chellai, O. Chmielewski, P. Choi, D. and Ciraolo, G. Classen, I. G. J. Coda, S. Colandrea, C. Dal Molin, A. David, P. de Baar, M. R. Decker, J. Dekeyser, W. de Oliveira, H. Douai, D. Dreval, M. Dunne, M. G. and Duval, B. P. Elmore, S. Embreus, O. Eriksson, F. and Faitsch, M. Falchetto, G. Farnik, M. Fasoli, A. and Fedorczak, N. Felici, F. Fevrier, O. Ficker, O. Fil, A. and Fontana, M. Fransson, E. Frassinetti, L. Furno, I and Gahle, D. S. Galassi, D. Galazka, K. Galperti, C. and Garavaglia, S. Garcia-Munoz, M. Geiger, B. Giacomin, M. and Giruzzi, G. Gobbin, M. Golfinopoulos, T. Goodman, T. and Gorno, S. Granucci, G. Graves, J. P. Griener, M. Gruca, M. Gyergyek, T. Haelterman, R. Hakola, A. Han, W. and Happel, T. Harrer, G. Harrison, J. R. Henderson, S. and Hogeweij, G. M. D. Hogge, J-P Hoppe, M. Horacek, J. and Huang, Z. Iantchenko, A. Innocente, P. Bjork, K. Insulander and Ionita-Schrittweiser, C. Isliker, H. Jardin, A. Jaspers, R. J. E. Karimov, R. Karpushov, A. N. Kazakov, Y. Komm, M. Kong, M. Kovacic, J. Krutkin, O. Kudlacek, O. and Kumar, U. Kwiatkowski, R. Labit, B. Laguardia, L. and Lammers, J. T. Laribi, E. Laszynska, E. Lazaros, A. and Linder, O. Linehan, B. Lipschultz, B. Llobet, X. Loizu, J. Lunt, T. Macusova, E. Marandet, Y. Maraschek, M. and Marceca, G. Marchetto, C. Marchioni, S. Marmar, E. S. and Martin, Y. Martinelli, L. Matos, F. Maurizio, R. and Mayoral, M-L Mazon, D. Menkovski, V Merle, A. Merlo, G. and Meyer, H. Mikszuta-Michalik, K. Cabrera, P. A. Molina and Morales, J. Moret, J-M Moro, A. Moulton, D. Muhammed, H. and Myatra, O. Mykytchuk, D. Napoli, F. Nem, R. D. and Nielsen, A. H. Nocente, M. Nowak, S. Offeddu, N. Olsen, J. Orsitto, F. P. Pan, O. Papp, G. Pau, A. Perek, A. and Pesamosca, F. Peysson, Y. Pigatto, L. Piron, C. and Poradzinski, M. Porte, L. Putterich, T. Rabinski, M. and Raj, H. Rasmussen, J. J. Ratta, G. A. Ravensbergen, T. and Ricci, D. Ricci, P. Rispoli, N. Riva, F. and Rivero-Rodriguez, J. F. Salewski, M. Sauter, O. Schmidt, B. S. Schrittweiser, R. Sharapov, S. Sheikh, U. A. Sieglin, B. Silva, M. Smolders, A. Snicker, A. Sozzi, C. and Spolaore, M. Stagni, A. Stipani, L. Sun, G. Tala, T. and Tamain, P. Tanaka, K. Biwole, A. Tema Terranova, D. and Terry, J. L. Testa, D. Theiler, C. Thornton, A. Thrysoe, A. Torreblanca, H. Tsui, C. K. Vaccaro, D. Vallar, M. and van Berkel, M. Van Eester, D. van Kampen, R. J. R. Van Mulders, S. Verhaegh, K. Verhaeghe, T. Vianello, N. and Villone, F. Viezzer, E. Vincent, B. Voitsekhovitch, I and Vu, N. M. T. Walkden, N. Wauters, T. Weisen, H. Wendler, N. Wensing, M. Widmer, F. Wiesen, S. Wischmeier, M. and Wijkamp, T. A. Wunderlich, D. Wuthrich, C. Yanovskiy, V and Zebrowski, J. EUROfusion MST1 Team

Abstract

The tokamak a configuration variable (TCV) continues to leverage its unique shaping capabilities, flexible heating systems and modern control system to address critical issues in preparation for ITER and a fusion power plant. For the 2019-20 campaign its configurational flexibility has been enhanced with the installation of removable divertor gas baffles, its diagnostic capabilities with an extensive set of upgrades and its heating systems with new dual frequency gyrotrons. The gas baffles reduce coupling between the divertor and the main chamber and allow for detailed investigations on the role of fuelling in general and, together with upgraded boundary diagnostics, test divertor and edge models in particular. The increased heating capabilities broaden the operational regime to include T (e)/T (i) similar to 1 and have stimulated refocussing studies from L-mode to H-mode across a range of research topics. ITER baseline parameters were reached in type-I ELMy H-modes and alternative regimes with `small' (or no) ELMs explored. Most prominently, negative triangularity was investigated in detail and confirmed as an attractive scenario with H-mode level core confinement but an L-mode edge. Emphasis was also placed on control, where an increased number of observers, actuators and control solutions became available and are now integrated into a generic control framework as will be needed in future devices. The quantity and quality of results of the 2019-20 TCV campaign are a testament to its successful integration within the European research effort alongside a vibrant domestic programme and international collaborations.

Published
2022

48. Operating a full tungsten actively cooled tokamak: overview of WEST first phase of operation

Author

Bucalossi, J., Achard, J., Agullo, O., Alarcon, T., Allegretti, L., Ancher, H., Antar, G., Antusch, S., Anzallo, V., Arnas, C., Arranger, D., Artaud, J. F., Aumeunier, M. H., Baek, S. G., Bai, X., Balbin, J., Balorin, C., Barbui, T., Barbuti, A., Barlerin, J., Basiuk, V., Batal, T., Baulaigue, O., Bec, A., Bécoulet, M., Benoit, E., Benard, E., Benard, J. M., Bertelli, N., Bertrand, E., Beyer, P., Bielecki, J., Bienvenu, P., Bisson, R., Bobkov, V., Bodner, G., Bottereau, C., Bouchand, C., Bouquey, F., Bourdelle, C., Bourg, J., Brezinsek, S., Brochard, F., Brun, C., Bruno, V., Bufferand, H., Bureau, A., Burles, S., Camenen, Y., Cantone, B., Caprin, E., Carpentier, S., Caulier, G., Chanet, N., Chellai, O., Chen, Y., Chernyshova, M., Chmielewski, P., Choe, W., Chomiczewska, A., Ciraolo, G., Clairet, F., Coenen, J., Colas, L., Colledani, G., Colnel, J., Coquillat, P., Corbel, E., Corre, Y., Costea, S., Courtois, X., Czarski, T., Daniel, R., Daumas, J., De Combarieu, M., Temmerman, G., De, De Vries, P., Dechelle, C., Deguara, F., Dejarnac, R., Delaplanche, J. M., Delgado-Aparicio, L. 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Subjects
Nuclear and High Energy Physics, Tokamak, Materials science, WEST, Nuclear engineering, Phase (waves), chemistry.chemical_element, Tungsten, law.invention, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], law, ITER, divertor, DEMO, Engineering & allied operations, nuclear fusion, Superconductivity, [PHYS]Physics [physics], Divertor, RF power amplifier, magnetic confinement, Plasma, Condensed Matter Physics, chemistry, Heat flux, ddc:620, tokamak physics
Abstract

WEST is an MA class superconducting, actively cooled, full tungsten (W) tokamak, designed to operate in long pulses up to 1000 s. In support of ITER operation and DEMO conceptual activities, key missions of WEST are: (i) qualification of high heat flux plasma-facing components in integrating both technological and physics aspects in relevant heat and particle exhaust conditions, particularly for the tungsten monoblocks foreseen in ITER divertor; (ii) integrated steady-state operation at high confinement, with a focus on power exhaust issues. During the phase 1 of operation (2017–2020), a set of actively cooled ITER-grade plasma facing unit prototypes was integrated into the inertially cooled W coated startup lower divertor. Up to 8.8 MW of RF power has been coupled to the plasma and divertor heat flux of up to 6 MW m−2 were reached. Long pulse operation was started, using the upper actively cooled divertor, with a discharge of about 1 min achieved. This paper gives an overview of the results achieved in phase 1. Perspectives for phase 2, operating with the full capability of the device with the complete ITER-grade actively cooled lower divertor, are also described.

Published
2022
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49. Stochastic Processes Applied to Line Shapes

Author

Stamm R., Boland D., Hammami R., Capes H., Catoire F., Koubiti M., Mekkaoui A., Marandet Y., Rosato J., Godbert-Mouret L., and Christova M.

Subjects
line shapes, stark effect, stochastic processes, Astronomy, QB1-991
Abstract

We present approaches using stochastic processes for the calculation of line broadening in plasmas. The derivation of model microfield methods (MMM) based on analytic formulations is recalled, as well as an approach using a simulation of the stochastic process. We discuss the possibility of an improvement of the stochastic process by comparing our first results to ab initio particle simulations coupled to a numerical integration of the emitters Schrödinger equation.

Published
2011
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50. Multi machine scaling of fuel retention in 4 carbon dominated tokamaks

Author

Tsitrone, E., Pégourié, B., Marandet, Y., Artaud, J.F., Brosset, C., Bucalossi, J., Corre, Y., Dittmar, T., Gauthier, E., Languille, P., Linez, F., Loarer, T., Martin, C., Roubin, P., Kallenbach, A., Krieger, K., Mayer, M., Neu, R., Rohde, V., Roth, J., Rubel, M., Brezinsek, S., Kirschner, A., Kreter, A., Litnovsky, A., Philipps, V., Wienhold, P., Likonen, J., Coad, P., Lipschultz, B., and Doerner, R.

Published
2011
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