Quantification of locked mode instability triggered by a change in confinement

Autor: Peterka, M., Seidl, J., Markovic, T., Loarte, A., Logan, N. C., Park, J. -K., Cahyna, P., Havlicek, J., Imrisek, M., Kripner, L., Panek, R., Sos, M., Bilkova, P., Bogar, K., Bohm, P., Casolari, A., Gribov, Y., Grover, O., Hacek, P., Hron, M., Kovarik, K., Tomes, M., Tskhakaya, D., Varju, J., Vondracek, P., Weinzettl, V., Team, the COMPASS

This work presents the first analysis of the disruptive locked mode (LM) triggered by the dynamics of a confinement change. It shows that, under certain conditions, the LM threshold during the transient is significantly lower than expected from stead

Externí odkaz: http://arxiv.org/abs/2404.11090

Overview of recent physics results from MAST

Autor: Kirk, A, Adamek, J, Akers, RJ, Allan, S, Appel, L, Lucini, F Arese, Barnes, M, Barrett, T, Ayed, N Ben, Boeglin, W, Bradley, J, Browning, P K, Brunner, J, Cahyna, P, Carr, M, Casson, F, Cecconello, M, Challis, C, Chapman, IT, Chapman, S, Conroy, S, Conway, N, Cooper, WA, Cox, M, Crocker, N, Crowley, B, Cardnell, S, Chorley, J, Cunningham, G, Danilov, A, Darrow, D, Dendy, R, Dickinson, D, Dorland, W, Dudson, B, Easy, L, Elmore, S, Evans, M, Farley, T, Fedorczak, N, Field, A, Fitzgerald, I, Fox, M, Freethy, S, Garzotti, L, Ghim, YC, Gi, K, Gorelenkova, M, Gracias, W, Gurl, C, Guttenfelder, W, Ham, C, Harting, D, Havlickova, E, Hawkes, N, Hender, T, Henderson, S, Hillesheim, J, Hnat, B, Horacek, J, Howard, J, Howell, D, Dunai, D, Fishpool, G, Gibson, K, Harrison, J, Highcock, E, Huang, B, Inomoto, M, Imazawa, R, Jones, O, Kadowaki, K, Kaye, S, Keeling, D, Kocan, M, Kogan, L, Komm, M, Lai, W, Leddy, J, Leggate, H, Imada, K, Klimek, I, Hollocombe, J, Lipschultz, B, Lisgo, S, Liu, YQ, Lloyd, B, Lomanowski, B, Lukin, V, Maddison, G, Madsen, J, Mailloux, J, Martin, R, McArdle, G, Lupelli, I, McClements, K, McMillan, B, Meakins, A, Meyer, H, Michael, C, Militello, F, Milnes, J, Motojima, G, Muir, D, Naylor, G, Nielsen, A, O'Brien, M, O'Mullane, M, Olsen, J, Omotani, J, Ono, Y, Pamela, S, Morris, AW, O'Gorman, T, Pangione, L, Parra, F, Patel, A, Peebles, W, Perez, R, Pinches, S, Piron, L, Price, M, Reinke, M, Ricci, P, Riva, F, Roach, C, Romanelli, M, Ryan, D, Saarelma, S, Saveliev, A, Scannell, R, Schekochihin, A, Sharapov, S, Sharples, R, Shevchenko, V, Shinohara, K, Silburn, S, Simpson, J, Stanier, A, Storrs, J, Summers, H, Takase, Y, Tamain, P, Tanabe, H, Tanaka, H, Tani, K, Taylor, D, Thomas, D, Thomas-Davies, N, Thornton, A, Turnyanskiy, M, Valovic, M, Vann, R, Van Wyk, F, Walkden, N, Watanabe, T, Wilson, H, Wischmeier, M, Yamada, T, Young, J, Zoletnik, S, Team, the MAST, Team, the EUROfusion MST1

New results from MAST are presented that focus on validating models in order to extrapolate to future devices. Measurements during start-up experiments have shown how the bulk ion temperature rise scales with the square of the reconnecting field. Dur

Externí odkaz: http://arxiv.org/abs/1611.06047

Modelling of spatial structure of divertor footprints caused by edge-localized modes mitigated by magnetic perturbations

Autor: Cahyna, Pavel, Becoulet, Marina, Huijsmans, Guido T. A., Orain, Francois, Morales, Jorge, Kirk, Andrew, Thornton, Andrew J., Pamela, Stanislas, Panek, Radomir, Hoelzl, Matthias

Resonant magnetic perturbations (RMPs) can mitigate the edge-localized modes (ELMs), i.e. cause a change of the ELM character towards smaller energy loss and higher frequency. During mitigation a change of the spatial structure of ELM loads on divert

Externí odkaz: http://arxiv.org/abs/1601.03002

ELM mitigation via rotating resonant magnetic perturbations on MAST

Autor: Thornton, A. J., Kirk, A., Cahyna, P., Chapman, I. T., Fishpool, G., Harrison, J. R., Liu, Y. Q., Kripner, L., Peterka, M., Team, the MAST

Publikováno v: Journal of Nuclear Materials, Vol.463, August 2015, pp.723-726

The application of resonant magnetic perturbations (RMPs) produces splitting of the divertor strike point due to the interaction of the RMP field and the plasma field. The application of a rotating RMP field causes the strike point splitting to rotat

Externí odkaz: http://arxiv.org/abs/1410.2473

Characteristics of X-point Lobe Structures in Single-Null Discharges on MAST

Autor: Harrison, J. R., Kirk, A., Chapman, I. T., Cahyna, P., Liu, Yueqiang, Nardon, E., Thornton, A. J.

Publikováno v: Nuclear Fusion, Vol.54, No.6, June 2014, p.064015

Lobe structures due to the application of resonant magnetic perturbations (RMPs) have been observed using wide-angle imaging of light from He1+ ions in the vicinity of the lower X-point in MAST. The data presented are from lower single-null discharge

Externí odkaz: http://arxiv.org/abs/1307.1573