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- W127536704 abstract "The problem of stationary current sustainment in a Tokamak device is one of the most important problems in fusion research. In order to drive a toroidal current within a plasma, one has the possibility either to use external sources, as in ECRH, ICRH, LH and NB, or internal sources, as in the case of the bootstrap current. A very interesting and up to now unique solution to the above mentioned problems is the so-called passive cyclotron current drive method proposed by Dawson and Kaw. It unifies the advantage of being an internal method with a high enough efficiency pertinent to methods which use the electrons in the tail of the Maxwellian distribution. The method relies on asymmetries in the radiation intensity introduced to the system through asymmetries of the wall (e.g. small fish-scale like structures). This method could provide a solution for a bootstrap current sustained Tokamak equilibrium, at least for high-field and high-temperature plasmas, because in most cases it gives a peaked current profile with strong current in the center as it is shown in the present paper. Of course, this way of current drive does also not come for free, because with the use of such structures, themore » loss from the plasma will be inevitably increased. Up to now, this passive cyclotron current drive method was studied mainly in terms of efficiency. However, the problem was not solved in a self-consistent way. 10 refs., 6 figs., 1 tab.« less" @default.
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- W127536704 date "1995-04-01" @default.
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- W127536704 title "Passive Cyclotron Current Drive for Tokamaks" @default.
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- W127536704 doi "https://doi.org/10.13182/fst95-a11947120" @default.
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