Results 141 to 150 of about 345 (184)

Progress on spherical tokamaks

Plasma Physics and Controlled Fusion, 1994
The history of low-aspect-ratio 'spherical' tokamak research is described and the advantages claimed for the concept are outlined and compared with experimental results from the START device and elsewhere. Further development of the spherical tokamak, and its potential for a materials test facility or ultimately a fusion plant, are discussed.
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Spherical tokamaks today

Plasma Devices and Operations, 2001
Abstract The research activities in the field of the smali aspect ratio or spherical tokamaks are reviewed. Stability and eauilibrium issues of the spherical tokamak plasma are discussed and comparison to the conventional tokamak approximation is made.
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The spherical tokamak programme at Culham

Nuclear Fusion, 1999
The spherical tokamak (ST) is the low aspect ratio limit of the conventional tokamak and appears to offer attractive physics properties in a simpler device. The START (Small Tight Aspect Ratio Tokamak) experiment provided the world's first demonstration of the properties of hot plasmas in an ST configuration and was operational at Culham from January ...
A Sykes, the START Team, the NBI Team, the MAST Team, the Theory Team   +4 more
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Globus-M spherical tokamak

Technical Physics, 1999
The main parameters and design of the Globus-M spherical tokamak are described, including the modifications introduced after construction was completed. The experimental program and possibilities for optimizing the operating regimes of the facility are discussed.
V. K. Gusev, V. E. Golant, E. Z. Gusakov, V. V. D’yachenko, M. A. Irzak, V. B. Minaev, E. E. Mukhin, A. N. Novokhatskii, K. A. Podushnikova, G. T. Razdobarin, N. V. Sakharov, E. N. Tregubova, V. S. Uzlov, O. N. Shcherbinin, V. A. Belyakov, A. A. Kavin, Yu. A. Kostsov, E. G. Kuz’min, V. F. Soikin, E. A. Kuznetsov, V. A. Yagnov   +20 more
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Physics of spherical tokamaks

Technical Physics, 1999
Spherical tokamaks are a limiting case of conventional tokamaks, combining simple design with attractive physical characteristics. Being of potential importance for the controlled nuclear fusion program in their own right, spherical tokamaks also contribute much to our understanding of the physics of conventional tokamaks.
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The Way Forward for the Spherical Tokamak

Fusion Technology, 1996
The low aspect ratio or spherical tokamak offers the prospect of burning plasmas in a compact simple system at a lower cost than in conventional tokamaks. The promising results obtained on START and other small spherical tokamaks have led to the approval of higher current devices at the MA level where the key issues of operational limits, confinement ...
D C Robinson, R Buttery, I Cook, M Cox, M Gryaznevich, T C Hender, P Knight, A W Morris, M R O'Brien, C Ribeiro, A Sykes, T N Todd, M Walsh, H R Wilson   +13 more
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'Natural elongation' of spherical tokamaks

Nuclear Fusion, 1992
The variation of the elongation of axisymmetric plasma columns in vertical equilibrium magnetic fields is investigated as a function of the aspect ratio using the Solov'ev equilibrium model and the principle of virtual ...
M Roberto, R.M.O Galvao
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Bootstrap Current in Spherical Tokamaks

Plasma Science and Technology, 2003
Variational principle for the neoclassical theory has been developed by including a momentum restoring term in the electron-electron collisional operator, which gives an additional free parameter maximizing the heat production rate. All transport coefficients are obtained including the bootstrap current.
Wang Zhongtian, Wang Long
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Electromagnetic Instabilities in Spherical Tokamaks

2023
Electromagnetic microinstabilities are likely to dominate transport in high β next generation spherical tokamaks (STs) such as STEP. While gyrokinetic (GK) simulations have thus far proven to be a very accurate tool in modelling turbulent transport in predominantly electrostatic regimes at low β, obtaining saturated nonlinear simulations of plasmas ...
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Fast scanning probe for the NSTX spherical tokamak

Review of Scientific Instruments, 2009
We describe a fast reciprocating Langmuir probe and drive system, which has four main new features: (1) use of high-temperature, vacuum, circuit boards instead of cables to reduce weight and increase to 21 the number of possible connections, (2) rotatable and removable shaft, (3) 10 tip construction with designed hardware bandwidth up to 10 MHz, and (4)
J A, Boedo, N, Crocker, L, Chousal, R, Hernandez, J, Chalfant, H, Kugel, P, Roney, J, Wertenbaker   +7 more
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