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Beta limit of resistive plasma in a heliotron (1992)

Itoh, K. ; Ichiguchi, K. ; Itoh, S.-I.

New York, NY : American Institute of Physics (AIP)

Physics of Fluids 4 (1992), S. 2929-2933

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ISSN: 1089-7666

Source: AIP Digital Archive

Topics: Physics

Notes: Stability against the interchange mode in heliotron devices is investigated, taking into account the effects of the resistivity, current diffusivity, ion viscosity, and thermal diffusivity. Critical beta for the low-mode-number stability is found at the finite beta value. For the range of plasma parameters of the present experiments, the resistive mode and current diffusive mode set comparable critical beta values, which are consistent with experimental observations. In future high-temperature plasmas, the current-diffusive mode could be important in determining the stability limit for the global mode.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.860132

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Large Helical Device (LHD) program (1996)

Fujiwara, M. ; Yamazaki, K. ; Okamoto, M. ; [et al.]

Springer

Journal of fusion energy 15 (1996), S. 7-153

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ISSN: 1572-9591

Source: Springer Online Journal Archives 1860-2000

Topics: Energy, Environment Protection, Nuclear Power Engineering

Notes: Abstract The largest superconducting fusion machine, Large Helical Device (LHD), is now under construction in Japan and will begin operation in 1997. Design and construction of related R&D programs are now being carried out. The major radius of this machine is 3.9 m and the magnetic field on the plasma center is 3 T. The NbTi superconducting conductors are used in both helical coils and poloidal coils to produce this field. This will be upgraded in the second phase a using superfluid coil cooling technique. A negative ion source is being successfully developed for the NBI heating of LHD. This paper describes the present status and progress in its experimental planning and theoretical analysis on LHD, and the design and construction of LHD torus, heating, and diagnostics equipments.