The design of end magnetic system coils for `AMBAL-M´

Author

Persov, M.B. ; Livshits, A.A. ; Shryner, K.K. ; Khrestolyubov, V.S. ; Kuznetsov, G.F.

Author_Institution

Inst. of Nucl. Phys., Novosibirsk, USSR

Volume

28

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

255

Lastpage

258

Abstract

The end of the AMBAL-M tandem mirror plasma trap is an axially symmetric plug with a semicusp MHD (magnetohydrodynamic)-expander. The plug field is formed by a pair of coils, and the semicusp field is formed by another pair of anti-parallel coils. The axial dimension of the end magnet system is 3.2 m, and the middle diameters of the coils are from 0.6 to 1.1 m. The operation mode features a 24-kA current, a 1.5-s effective pulse time, and a repetition rate of 1 pulse per 15 min. The coil design is described. The coil is a packet of parallel modules whose conductor is a copper ribbon with a 500-mm² cross section, and water-cooled copper disks between them for heat removal. The heat calculation principles are given. The characteristics of the smaller semicusp coil with regard to its location in a vacuum are noted. Some manufacturing problems are also described

Keywords

fusion reactor theory and design; magnetic mirrors; solenoids; 24 kA; AMBAL-M; axially symmetric plug; design; end magnetic system coils; heat calculation; heat sink; manufacturing problems; operation mode; packet of parallel modules; pair of anti-parallel coils; semicusp MHD-expander; tandem mirror plasma trap; vacuum location; Coils; Conductors; Copper; Flanges; Magnetic fields; Mirrors; Plasma stability; Plugs; Shape; Vacuum systems;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.119859

Filename

119859