Results 31 to 40 of about 2,674 (184)

Experimental observations of bifurcated power decay lengths in the near Scrape-Off Layer of ST40 High Field Spherical Tokamak

Nuclear Materials and Energy
The scrape-off layer parallel heat flux decay lengths measured at ST40, a high field, low aspect ratio spherical tokamak, have been observed to bifurcate into two groups.
X. Zhang, C. Marsden, M. Moscheni, E.N.J. Maartensson, A. Rengle, M. Robinson, T. O’Gorman, H.F. Lowe, E. Vekshina, S. Janhunen, A. Scarabosio, P.F. Buxton, M. Sertoli, M. Romanelli, S.A.M. McNamara, T.K. Gray, N.A. Lopez   +16 more
doaj   +1 more source

Scalings for tokamak energy confinement [PDF]

Nuclear Fusion, 1990
On the basis of an analysis of the ITER L-mode energy confinement database, two new scaling expressions for tokamak L-mode energy confinement are proposed, namely a power law scaling and an offset-linear scaling. The analysis indicates that the present multiplicity of scaling expressions for the energy confinement time TE in tokamaks (Goldston, Kaye ...
Yushmanov, P., Takizuka, T., Riedel, K., Kardaun, O., Cordey, J., Kaye, S., Post, D.   +6 more
openaire   +3 more sources

Effect of negative triangularity on the bulk ions co-current rotation caused by the ion orbit loss at the edge of the tokamak plasmas

Nuclear Fusion, 2022
The ion orbit loss (IOL) can drive the bulk ions co-current rotation at the edge of the tokamak plasmas. The effect of triangularity on the IOL is investigated by using an analytical tokamak equilibrium model for the shaped plasmas.
Ruoying Wang, Chengkang Pan
doaj   +1 more source

Simple Parametric Model for Calculation of Lateral Electromagnetic Loads in Tokamaks at Asymmetric Vertical Displacement Events (AVDE)

Plasma, 2022
This paper describes a family of relatively simple numerical models for calculation of asymmetric electromagnetic (EM) loads at all tokamak structures and coils at asymmetric vertical plasma displacement events (AVDE). Unlike currently known AVDE studies
Sergey Sadakov, Fabio Villone, Guglielmo Rubinacci, Salvatore Ventre   +3 more
doaj   +1 more source

Coupling Fluid Neutrals to Gyrokinetic Plasma Dynamics for Edge and SOL Turbulence Simulations

Contributions to Plasma Physics, EarlyView.
ABSTRACT Accurate modeling of turbulent transport in magnetic confinement fusion devices requires extending first‐principles gyrokinetic simulations from the core to the edge and scrape‐off layer (SOL), where additional physics—particularly plasma–neutrals interactions—must be included.
Sabine Ogier‐Collin, Philipp Ulbl, Wladimir Zholobenko, Frank Jenko   +3 more
wiley   +1 more source

Edge Fluid Turbulence Simulations of Stellarators With GRILLIX

Contributions to Plasma Physics, EarlyView.
ABSTRACT The edge fluid turbulence code GRILLIX has recently been extended from axisymmetric tokamak geometries to support 3D stellarator configurations. Following successful proof‐of‐principle simulations published in Stegmeir et al., we present here a comprehensive simulation of the Wendelstein 7‐AS stellarator.
Andreas Stegmeir, Christoph Pitzal, Barnabas Csillag, Miguel Madeira, Marion Finkbeiner   +4 more
wiley   +1 more source

Initial analytical theory of plasma disruption and experimental evidence

Scientific Reports, 2023
It is a great physical challenge to achieve controlled nuclear fusion in magnetic confinement tokamak and solve energy shortage problem for decades. In tokamak plasma, large-scale plasma instability called disruption will halt power production of reactor
Huibin Qiu, Zuozhi Hu, Shengfa Wu, Jiangcun Chen, Chengjie Zhong, Junjie Wu, Xiaobin Li, Donghua Xiao, Chunhui Shi, Junhui Liu, Wenjun Xiong, Tianyi Hu, Qilong Cai, Youlong Yuan   +13 more
doaj   +1 more source

2D Implementation of Kinetic‐Diffusion Monte Carlo in Eiron

Contributions to Plasma Physics, EarlyView.
ABSTRACT Particle‐based kinetic Monte Carlo simulations of neutral particles are one of the major computational bottlenecks in tokamak scrape‐off layer simulations. This computational cost comes from the need to resolve individual collision events in high‐collisional regimes.
Oskar Lappi, Emil Løvbak, Thijs Steel, Giovanni Samaey   +3 more
wiley   +1 more source

Effect of Magnetic Islands on Neoclassical Heat Diffusivity in a Global Tokamak Simulation

Contributions to Plasma Physics, EarlyView.
ABSTRACT Resonant magnetic perturbations (RMPs) alter magnetic field topology via island formation and can modify core transport in toroidal fusion devices. Using the global gyrokinetic particle‐in‐cell code XGC‐S, originally developed for stellarator geometries, we quantify how island topology affects neoclassical heat transport in a circular tokamak ...
Joseph X. Li, Toseo Moritaka, Ryutaro Kanno, Gakushi Kawamura, Robert Hager, C.‐S. Chang   +5 more
wiley   +1 more source

Tokamak Energy’s pre-concept design for a fusion power plant: an overview of ST-E1

Nuclear Fusion
Climate change and rapidly rising energy demand, driven in part by artificial intelligence and data-centre growth, create an urgent need for stable, low-carbon, and abundant power. Fusion is a promising long-term solution, yet its commercialisation faces
J. Willis, S.A.M. McNamara, E.N.J. Maartensson, J. Astbury, E. Yildirim, N. Hinton, C.L. Wilson, X. Zhang, J.W. Berkery, L. Baylor, M. Shimada, H. Flynn, A.O. Nelson, S. Abouelazayem, A. Alieva, T. Anderson, J. Benayas, L. Black, M. Borscz, M. Bristow, S. Brown, P. Bunting, A. Burchill, K. Chandrasekhar, P. Cheema, O. Danisworo, A. Dnestrovskii, A.V. Dudkovskaia, J. England, J. Fowler, V. Godhani, E. Guise, S. Irukuvarghula, D. James, F. Janky, G.S. Kamal, J. Kang, M. Kruip, A. Kumar, V.Y.S. Lee, S.M. Levine, J. Lima, N.A. Lopez, I. Loughran, F. Malinowski, C. Marsden, L. Mateescu, A.F.P. McAdam, S.Y. Medvedev, M. Michalopoulou, M.K.E. Mohamed, J. Naish, G. Naylor, D. O’Dea, J. Pickles, R. Pocock, M. Robinson, M. Romanelli, S. Romanelli, A. Scarabosio, M. Scarpari, A. Scott, A. Shone, A. Sladkomedova, A. Soldatova, T. Srawley, J. Stirling, G. Stoneham, R. Suhardjo, Y. Takase, J. Taylor, S. Terry, R. Thwaites, J. Trueba, B. van Nugteren, J. Varje, E. Vekshina, B. Vincent, A. Vorobev, A.L. Washington II, N. Welch, A. Whitehead, M. Whitfield, E. Wooldridge, M. Ginsberg   +84 more
doaj   +1 more source