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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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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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Alpha-particle physics in tokamaks
Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 1999Efficient plasma heating by energetic fusion particles is a key element of achieving ignition or high fusion gain regimes (Q 1) in a tokamak reactor.
Putvinski, S +8 more
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Dust in tokamaks: An overview of the physical model of the dust in tokamaks code
Physics of Plasmas, 2010The dynamical behavior of dust produced in tokamaks is an important issue for fusion. In this work, the current status of the dust in tokamaks (DTOKS) [J. D. Martin et al., Europhys Lett. 83, 65001 (2008)] dust transport code will be presented. A detailed description of the various elements of its underlying physical model will be given together with ...
Minas Bacharis +2 more
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Neoclassical Tearing Physics in the Spherical Tokamak MAST
Physical Review Letters, 2002Results from MAST provide a first test of neoclassical tearing mode physics in the spherical tokamak (ST). The mode accounts for the main performance limit in conventional tokamaks. Its behavior in the ST is remarkably well described by existing theoretical models, although it is more readily seeded by sawtooth events in these scenarios.
R. J. Buttery +7 more
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The physics of tokamak start-up
Physics of Plasmas, 2013Tokamak start-up on present-day devices usually relies on inductively induced voltage from a central solenoid. In some cases, inductive startup is assisted with auxiliary power from electron cyclotron radio frequency heating. International Thermonuclear Experimental Reactor, the National Spherical Torus Experiment Upgrade and JT60, now under ...
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Physics research with small tokamaks
AIP Conference Proceedings, 1995In this paper we review the contributions that small tokamaks have made to physics research in general and to fusion physics in particular. It is argued that although most spectacular and newsworthy results are obtained from large tokamaks like JET, TFTR, JT‐60 etc., they are often based upon ideas and concepts that have originated in the community of ...
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Use of titanium in the Tokamak Physics Experiment
Proceedings of 16th International Symposium on Fusion Engineering, 2002Titanium alloys have been considered for structural materials in fusion energy devices since the 1970's. Austenitic stainless steels were historically selected because they could be fabricated at a lower system acquisition cost. Nickel alloys allowed higher operating temperatures and provided higher electrical resistivity for reactor performance [1 ...
G.W. Wille +2 more
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Advanced tokamak physics-status and prospects
Plasma Physics and Controlled Fusion, 1994Experimental and theoretical results from around the world point to the possibility of high confinement, high- beta , and high-bootstrap-fraction steady-state tokamak operating modes. These modes of operation, if fully developed and extended to steady-state, could lead to much less expensive tokamak demonstration power reactors and to a significantly ...
R J Goldston +16 more
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Physics at the stellarator--tokamak interface
Plasma Physics and Controlled Fusion, 2011A tokamak is never exactly axisymmetric, either because of field errors or because the magnetic field is intentionally perturbed–something that is becoming increasingly popular for controlling the plasma edge. Conversely, a stellarator generally lacks symmetry but may be `quasisymmetric', meaning that the strength (but not the direction) of the ...
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Atomic physics in tokamak plasmas
Nuclear Instruments and Methods in Physics Research, 1982Abstract Tokamak discharges produce hydrogen-isotope plasmas in a quasi-steady state, with radial electron temperature, Te(r), and density ne(r), distribution usually centrally peaked, with typical values Te(0)∼1–3 keV, ne(r)∼1014 cm−3. Besides hydrogen, the plasma contains small quantities of carbon, oxygen, various construction or wall-conditioning
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