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Poloidal field coil system for an elongated tokamak : ETI

Author
Leuer, J. A.
Published
United States : [publisher not identified], 1985
Springfield, Va.: National Technical Information Service, [approximately 1985]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Politzer, P. A.

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Summary
The electromagnetic, structural and thermal aspects of a poloidal field (PF) coil system for an elongated tokamak are presented. The device (ETI) is capable of producing an ohmically ignited plasma and of sustaining the burn for up to 5 seconds. ETI has a major radius of 1.25 m, an aspect ratio of 5, and an elongation of 8. The plasma current is 17 MA, and the toroidal field is 5.7 T. The PF coil set consists of two solenoidal coil stacks with 12 independently controllable coils in each. The highly elongated geometry permits large plasma current without violating the constraint on the safety factor, q > 1. The elongation also allows design of a compact and efficient PF coil system. The system stores most of the required discharge flux within the coil set, and is capable of achieving a back-bias flux of 13 Vs and a total flux swing at the plasma boundary of 10 Vs. The equilibrium field contributes 55% of the plasma inductive flux, leading to a compact design. The total PF current swing is approx.40 MA-turns. Liquid nitrogen cooling is utilized and the midplane stresses and current densities are 138 Mpa (20 ksi) and 4 kA/cmS, respectively. The coil system is open ended, allowing good vertical access to the plasma chamber. The design is modular and easily maintainable.
Report Numbers
DE86005412; GA-A-18209; CONF-851102-79
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: AC03-84ER53158
OSTI Identifier 6275896
Research organization: GA Technologies, Inc., San Diego, CA (USA).
View MARC record | catkey: 47361488