High magnetic field generation using single-turn coils

Author

Werst, M.D. ; Ingram, S.K. ; Wehrlen, D.J. ; Weldon, W.F.

Author_Institution

Center for Electromech., Texas Univ., Austin, TX, USA

Volume

30

Issue

4

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

2550

Lastpage

2553

Abstract

The advent of the homopolar generator has recently permitted the demonstration of a 20 T on-axis, single turn toroidal magnet. Homopolar generators are inherently high current, low-voltage machines which ideally match the requirements of single-turn coils. Magnetic field levels previously limited by the insulation´s thermal and voltage breakdown capability have been surpassed. The entire coil volume is essentially occupied by high strength, high conductivity conductor. A current density of 840 MA/m² has been achieved in a 9 cm major radius, toroidal coil with a 9.14 MA, 56 V open-current discharge (sinusoidal pulse, 150 ms). Experimental test results are presented, as well as discussion of the potential for applying this technology to solenoid-type coils. This research is funded by the Texas Atomic Energy Research Foundation

Keywords

Tokamak devices; electromagnets; fusion reactor theory and design; homopolar generators; power supplies to apparatus; solenoids; 20 T; 56 V; 9.14 MA; IGNITEX tokamak; high conductivity conductor; high magnetic field generation; homopolar generator; low-voltage machines; open-current discharge; power supply; single turn toroidal magnet; single-turn coils; thermal breakdown capability; voltage breakdown capability; Atomic measurements; Coils; Conductivity; Conductors; Current density; Dielectric breakdown; Insulation; Magnetic fields; Testing; Toroidal magnetic fields;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.305798

Filename

305798