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Abstract

The aim of the present workshop is to discuss the WENDELSTEIN VIIX experiment, its characteristic properties regarding equilibrium, stability, transport behaviour, the physical expected parameter range, and its dimensions, in order to choose among the following four options: a W VIIXID configuration, derived from the Advanced Stellarator configuration (WENDELSTEIN VIIAS); a Beanshaped Advanced Stellarator Experiment (BSX), a modification of WENDELSTEIN VIIAS with planar magnetic axis and a beanshaped contour of the magnetic surfaces in a particular toroidal plane; a modular HELIAC characterized by a threedimensional magnetic axis and a strong indentation of the outer magnetic surfaces, which follows the helical axis excursion; a modular HELIAS configuration which combines elements of a HELIAC with the improved confinement properties of an Advanced Stellarator. Whereas in a HELIAC the confinement properties are governed by the rather large value of the rotational transform, the other three categories use the reduction of the secondary plasma currents (PfirschSchluter currents) which improves confinement and equilibrium beta values. All configurations except HELIAC approximate to a different degree the "weak Palumbo condition'. A magnetic well exists in the vacuum fields of all the configurations considered. The stability properties are improved by the specific topology, especially in the HELIAS configurations. In the plateau regime of collisionality the transport losses are reduced in BSX and HELIAS by a factor of about three as compared to values expected for an axisymmetric system, and for one of the HELIAS configurations the bootstrap current can vanish. Some fusion reactor aspects of these configurations are discussed. An assessment of reactor aspects of systems of the W VIIXID type, emphasizing results of the ASRA6C reference configuration, was presented at the 1986 Yalta Fusion Reactor Technology Conference.

Additional information

Authors: RAU F MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY) LEOTTA G G CEC BRUXELLES (BELGIUM) , MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, GARCHING BEI MUENCHEN (GERMANY);CEC BRUXELLES (BELGIUM)
Bibliographic Reference: EUR 11058 EN (1987) FS, 416 P., BFR 1400, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989126005500 / Last updated on: 1988-02-01
Category: PUBLICATION
Available languages: en
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