Results 11 to 20 of about 345 (184)

Design of vacuum system for NCST spherical tokamak

AIP Advances, 2023
The NanChang Spherical Tokamak (NCST) is a new compact tokamak with an aspect ratio of R/a = 1.67. The vacuum system is one of the most important sub-systems of the tokamak device and has been designed especially for the NCST device. It consists of three
Fu Hua Huang, Dong Hua Xiao, Xiao Chang Chen, Hui Chen, San Qiu Liu   +4 more
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Studies of various lower hybrid wave launch scenarios for non-inductive start-up on TST-2 [PDF]

EPJ Web of Conferences
Efficient non-inductive start-up of a spherical tokamak may be achieved by using lower hybrid waves that have high current drive efficiency. On the TST-2 spherical tokamak, three lower hybrid launchers are installed at the outer-midplane, top and outer ...
Tsujii Naoto, Adachi Fumiya, Ejiri Akira, Shinohara Kouji, Peng Yi, Lin Yuting, Jiang Zhengnan, Tian Yiming, Jiang Yangguang, Wang Shengyu, Yoshida Masaru, Takechi Yuta   +11 more
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Numerical Studies and Simulation of the Lower Hybrid Waves Current Drive by using Fokker – Planck Equation in NSST and HT-7 Tokamaks [PDF]

Journal of Sciences, Islamic Republic of Iran, 2014
Recent experiments on the spherical tokamak have discovered the conditions to create a powerful plasma and ensure easy shaping and amplification of stability, high bootstrap current and confinement energy.
A.A. Molavi Choobini
doaj  

Spherical tokamak development in Brazil [PDF]

Brazilian Journal of Physics, 2003
This paper describes the general characteristics of spherical tokamaks, or spherical tori, with a brief overview of work in this area already performed or in progress at several institutions worldwide. The paper presents also the steps in the development of the ETE (Experimento Tokamak Esferico) project, its research program, technical characteristics ...
Ludwig, G.O., Del Bosco, E., Ferreira, J.G., Berni, L.A., Oliveira, R.M., Andrade, M.C.R., Shibata, C.S., Ueda, M., Barbosa, L.F.W., Barroso, J.J., Castro, P.J., Patire Jr, H.   +11 more
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Achievement of ion temperatures in excess of 100 million degrees Kelvin in the compact high-field spherical tokamak ST40

Nuclear Fusion, 2023
Ion temperatures of over 100 million degrees Kelvin (8.6 keV) have been produced in the ST40 compact high-field spherical tokamak (ST). Ion temperatures in excess of 5 keV have not previously been reached in any ST and have only been obtained in much ...
S.A.M. McNamara, O. Asunta, J. Bland, P.F. Buxton, C. Colgan, A. Dnestrovskii, M. Gemmell, M. Gryaznevich, D. Hoffman, F. Janky, J.B. Lister, H.F. Lowe, R.S. Mirfayzi, G. Naylor, V. Nemytov, J. Njau, T. Pyragius, A. Rengle, M. Romanelli, C. Romero, M. Sertoli, V. Shevchenko, J. Sinha, A. Sladkomedova, S. Sridhar, Y. Takase, P. Thomas, J. Varje, B. Vincent, H.V. Willett, J. Wood, D. Zakhar, D.J. Battaglia, S.M. Kaye, L.F. Delgado-Aparicio, R. Maingi, D. Mueller, M. Podesta, E. Delabie, B. Lomanowski, O. Marchuk, the ST40 Team   +41 more
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Low n electromagnetic modes in spherical tokamaks

Plasma Physics and Controlled Fusion, 2021
Abstract The performance of spherical tokamak reactors depends on plasma β, and an upper limit is set by long-wavelength kinetic ballooning modes (KBMs). We examine how these modes become unstable in spherical-tokamak reactor relevant plasmas, which may contain significant fast-ion pressure.
J Chowdhury, B F McMillan
openaire   +1 more source

Divertor optimisation and power handling in spherical tokamak reactors

Nuclear Materials and Energy, 2023
A key aspect in the design of a spherical tokamak reactor is the optimisation of the plasma equilibrium, together with a compatible divertor configuration, and the corresponding poloidal field system.
A. Hudoba, S. Newton, G. Voss, G. Cunningham, S. Henderson   +4 more
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Gyrokinetic simulations of spherical tokamaks [PDF]

Plasma Physics and Controlled Fusion, 2009
This paper reviews transport and confinement in spherical tokamaks (STs) and our current physics understanding of this that is partly based on gyrokinetic simulations. Equilibrium flow shear plays an important role, and we show how this is consistently included in the gyrokinetic framework for flows that greatly exceed the diamagnetic velocity. The key
Roach, C, Abel, I, Akers, R, Arter, W, Barnes, M, Camenen, Y, Casson, F, Colyer, G, Connor, J, Cowley, S, Dickinson, D, Dorland, W, Field, A, Guttenfelder, W, Hammett, G, Hastie, R, Highcock, E, Loureiro, N, Peeters, A, Reshko, M, Saarelma, S, Schekochihin, A, Valovic, M, Wilson, H   +23 more
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Adhesion force of W dust on tokamak W plasma-facing surfaces: The importance of the impact velocity

Nuclear Materials and Energy, 2019
The adhesion of tungsten (W) dust particles on W tokamak plasma-facing surfaces is investigated. When spherical dust hits the tokamak walls, its shape is altered as a contact area is created by the adhesion work and irreversible plastic deformation.
A. Autricque, F. Gensdarmes, S. Peillon, M. Sow, C. Grisolia   +4 more
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Control of resistive wall modes in the spherical tokamak

Nuclear Fusion, 2023
In this work, the MARS-F/K codes (Liu et al 2000 Phys. Plasmas 7 3681; Liu et al 2008 Phys. Plasmas 15 112503) are utilized to model the passive and active control of the n = 1 ( n is the toroidal mode number) resistive wall mode (RWM) in a spherical ...
Guoliang Xia, Yueqiang Liu, T.C. Hender, K.G. McClements, E. Trier, E. Tholerus   +5 more
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