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New start for spherical tokamak
Physics World, 2015Physicists at the Princeton Plasma Physics Laboratory (PPPL) in the US are set to start experiments on a novel kind of fusion reactor known as a spherical tokamak.
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Fast scanning probe for the NSTX spherical tokamak
Review of Scientific Instruments, 2009We 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 +7 more
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Investigation of the electrical conductivity of a plasma in a spherical tokamak
Doklady Physics, 2004A two-dimensional mathematical model is described by the Maxwell equations, balance equations and the Ohm law equation in cylindrical coordinates. An averaging is performed by virtue of integration along a magnetic surface. Penetration of the induced magnetic field into plasma is described by the diffusion equation.
Kostomarov, D. P. +3 more
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Simulation of eddy currents in spherical tokamaks
Nuclear Fusion, 2006The simulation of eddy currents induced in the vacuum vessel and central column of spherical tokamaks is discussed, improving upon previously published methods. The present model allows us to describe the vacuum vessel either as a thin shell or as a large collection of rings, formally reducing the problem to a set of coupled circuit equations.
G.O Ludwig +3 more
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Electromagnetic Instabilities in Spherical Tokamaks
2023Electromagnetic 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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The Mega Amp Spherical Tokamak
Fusion Engineering and Design, 1999Results from START at Culham have been very impressive and have triggered the construction of several new Spherical Tokamaks (R/a ≤ 1.5), including the Mega Amp Spherical Tokamak (MAST), which was given EURATOM approval in April 1996. MAST (R = 0.7 m, a = 0.5 m, k ∼ 2, I p ≤ 2 MA) is twice the size of START and will allow plasmas with cross-section ...
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Steady state operation of spherical tokamaks
Nuclear Fusion, 2000For a fusion power plant to be economically and technologically attractive, it should be as compact as possible and capable of `steady state' operation. One approach is based upon the spherical tokamak (ST) concept. This configuration features many of the qualities of the conventional aspect ratio tokamak, such as good confinement and MHD stability ...
R.J Akers +26 more
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Plasma centre-post for spherical tokamaks
2013 IEEE 25th Symposium on Fusion Engineering (SOFE), 2013A preliminary study of a very simple plasma central post ECR-assisted scheme synergetic to an ultra-low aspect ratio tokamak is presented. Stability issues are qualitatively discussed. An innovative particle fuelling is proposed for this tokamak plasma using the plasma centre post as a carrier.
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