Search Results - "Naulin, V"

Turbulent transport and the plasma edge by Naulin, V.

“…In magnetically confined fusion experiments, turbulent transport dominates over collisional transport in the edge gradient region and in the scrape-off layer…”
Get full text

A key to improved ion core confinement in the JET tokamak: ion stiffness mitigation due to combined plasma rotation and low magnetic shear by Mantica, P, Angioni, C, Challis, C, Colyer, G, Frassinetti, L, Hawkes, N, Johnson, T, Tsalas, M, deVries, P C, Weiland, J, Baiocchi, B, Beurskens, M N A, Figueiredo, A C A, Giroud, C, Hobirk, J, Joffrin, E, Lerche, E, Naulin, V, Peeters, A G, Salmi, A, Sozzi, C, Strintzi, D, Staebler, G, Tala, T, Van Eester, D, Versloot, T

“…New transport experiments on JET indicate that ion stiffness mitigation in the core of a rotating plasma, as described by Mantica et al. [Phys. Rev. Lett. 102,…”
Get full text

First evidence of the role of zonal flows for the L-H transition at marginal input power in the EAST tokamak by Xu, G S, Wan, B N, Wang, H Q, Guo, H Y, Zhao, H L, Liu, A D, Naulin, V, Diamond, P H, Tynan, G R, Xu, M, Chen, R, Jiang, M, Liu, P, Yan, N, Zhang, W, Wang, L, Liu, S C, Ding, S Y

“…A quasiperiodic Er oscillation at a frequency of <4 kHz, much lower than the geodesic-acoustic-mode frequency, with a modulation in edge turbulence preceding…”
Get full text

New edge coherent mode providing continuous transport in long-pulse H-mode plasmas by Wang, H Q, Xu, G S, Wan, B N, Ding, S Y, Guo, H Y, Shao, L M, Liu, S C, Xu, X Q, Wang, E, Yan, N, Naulin, V, Nielsen, A H, Rasmussen, J Juul, Candy, J, Bravenec, R, Sun, Y W, Shi, T H, Liang, Y F, Chen, R, Zhang, W, Wang, L, Chen, L, Zhao, N, Li, Y L, Liu, Y L, Hu, G H, Gong, X Z

“…An electrostatic coherent mode near the electron diamagnetic frequency (20-90 kHz) is observed in the steep-gradient pedestal region of long pulse H-mode…”
Get full text

Evidence of inward toroidal momentum convection in the JET tokamak by Tala, T, Zastrow, K-D, Ferreira, J, Mantica, P, Naulin, V, Peeters, A G, Tardini, G, Brix, M, Corrigan, G, Giroud, C, Strintzi, D

“…Experiments have been carried out on the Joint European Torus tokamak to determine the diffusive and convective momentum transport. Torque, injected by neutral…”
Get full text

Computations of intermittent transport in scrape-off layer plasmas by Garcia, O E, Naulin, V, Nielsen, A H, Rasmussen, J Juul

“…Two-dimensional fluid simulations of interchange turbulence for geometry and parameters relevant for the scrape-off layer of magnetized plasmas are presented…”
Get full text

Autoresonant control of drift waves by Shagalov, A G, Rasmussen, J Juul, Naulin, V

“…The control of nonlinear drift waves in a magnetized plasmas column has been investigated. The studies are based on the Hasegawa-Mima model, which is solved on…”
Get full text

Direct observation of current in type-I edge-localized-mode filaments on the ASDEX Upgrade tokamak by Vianello, N, Naulin, V, Schrittwieser, R, Müller, H W, Zuin, M, Ionita, C, Rasmussen, J J, Mehlmann, F, Rohde, V, Cavazzana, R, Maraschek, M

“…Magnetically confined plasmas in the high confinement regime are regularly subjected to relaxation oscillations, termed edge localized modes (ELMs), leading to…”
Get full text

First results from the NORTH tokamak by Nielsen, S.K., Gryaznevich, M.P., Jacobsen, A.S., Jensen, T., Jessen, M., Korsholm, S.B., Rasmussen, J., Salewski, M., Senstius, M.G., Naulin, V., Nem, R.D., Korsgaard, M.L.H., Nilsson, A.C, Dam, F., Goltermann, A., Pedersen, A.C., Sutherland, M.T., Aalto, T., Hokkanen, A., Salmi, A., Tala, T.

“…NORTH is a small-sized tokamak located at the Technical University of Denmark. It can be operated both as a spherical tokamak and a simple magnetized torus…”
Get full text

Low-to-High Confinement Transition Mediated by Turbulence Radial Wave Number Spectral Shift in a Fusion Plasma by Xu, G S, Wan, B N, Wang, H Q, Guo, H Y, Naulin, V, Rasmussen, J Juul, Nielsen, A H, Wu, X Q, Yan, N, Chen, L, Shao, L M, Chen, R, Wang, L, Zhang, W

“…A new model for the low-to-high (L-H) confinement transition has been developed based on a new paradigm for turbulence suppression by velocity shear [G. M…”
Get full text

On the asymmetries of ELM divertor power deposition in JET and ASDEX Upgrade by Eich, T., Kallenbach, A., Fundamenski, W., Herrmann, A., Naulin, V.

“…An analytical expression was derived for describing the divertor target power during ELMs based on the model discussed in [W. Fundamenski, R.A. Pitts, Plasma…”
Get full text

RAMI analysis of the ITER LFS CTS system by Infante, V., Henriques, E., Gonçalves, B., Korsholm, S.B., Leipold, F., Gutierrez, H.E., Jensen, T., Jessen, M., Larsen, A.W., Naulin, V., Nielsen, S.K., Rasmussen, J., Salewski, M., Stejner, M., Taormina, A.

“…•An analysis was developed to obtain the ITER LFS CTS reliability and availability.•This study includes FMECA and the RBD of the system.•Criticality charts are…”
Get full text

Numerical investigation of Scrape Off Layer anomalous particle transport for MAST parameters by Militello, F., Fundamenski, W., Naulin, V., Nielsen, A.H.

“…Numerical simulations of L-mode plasma turbulence in the Scrape Off Layer of MAST are presented. Relevant features of the boundary plasma, such as the…”
Get full text

Relevance of collisionality in the transport model assumptions for divertor detachment multi-fluid modelling on JET by Wiesen, S., Fundamenski, W., Wischmeier, M., Groth, M., Brezinsek, S., Naulin, V.

“…A revised formulation of the perpendicular diffusive transport model in 2D multi-fluid edge codes is proposed. Based on theoretical predictions and…”
Get full text

Turbulent transport in the TCV SOL by Garcia, O.E., Pitts, R.A., Horacek, J., Nielsen, A.H., Fundamenski, W., Graves, J.P., Naulin, V., Rasmussen, J. Juul

“…From probe measurements in the far SOL of TCV it is demonstrated that while the particle density profile becomes increasingly broader with increasing line…”
Get full text

A study on the density shoulder formation in the SOL of H-mode plasmas by Carralero, D., Madsen, J., Artene, S.A., Bernert, M., Birkenmeier, G., Eich, T., Fuchert, G., Laggner, F., Naulin, V., Manz, P., Vianello, N., Wolfrum, E.

“…•The formation of a density shoulder has been observed in inter-ELM H-mode plasmas.•There is a link between shoulder formation and filament…”
Get full text

New Edge Coherent Mode Providing Continuous Transport in Long-Pulse H-mode Plasmas by Wang, H. Q., Xu, G. S., Wan, B. N., Ding, S. Y., Guo, H. Y., Shao, L. M., Liu, S. C., Xu, X. Q., Wang, E., Yan, N., Naulin, V., Nielsen, A. H., Rasmussen, J. Juul, Candy, J., Bravenec, R., Sun, Y. W., Shi, T. H., Liang, Y. F., Chen, R., Zhang, W., Wang, L., Chen, L., Zhao, N., Li, Y. L., Liu, Y. L., Hu, G. H., Gong, X. Z.

Get full text

The effect of plasma fluctuations on parallel transport parameters in the SOL by Havlíčková, E., Fundamenski, W., Naulin, V., Nielsen, A.H., Wiesen, S., Horacek, J., Seidl, J.

“…The effect of plasma fluctuations due to turbulence at the outboard midplane on parallel transport properties is investigated. Time-dependent fluctuating…”
Get full text

Parallel SOL flow on TCV by Pitts, R.A., Horacek, J., Fundamenski, W., Garcia, O.E., Nielsen, A.H., Wischmeier, M., Naulin, V., Juul Rasmussen, J.

“…Particle flow measurements parallel to the total magnetic field direction have been obtained for the first time in the TCV tokamak scrape-off layer. The plasma…”
Get full text

Palm trees and islands – Current filaments in the edge of JET by Maszl, Ch, Naulin, V., Brix, M., Versloot, T.W., Schrittwieser, R.

“…It is now well known that edge localized modes (ELMs) lead to the ejection of a number of filamentary structures into the scrape-off layer (SOL). ELMs thus…”
Get full text