Cryostabilization of high-temperature superconducting magnets with subcooled flow in microchannels

Author

Cha, Y.S. ; Hull, J.R. ; Choi, U.S.

Author_Institution

Argonne Nat. Lab., IL, USA

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

172

Lastpage

176

Abstract

Subcooled flow of liquid nitrogen in microchannels is proposed as a means to enhance the stability of superconducting magnets. An analysis shows that high current density or a low stabilizer fraction can be obtained in a cryostable magnet. An increase in stability (with the Stekley criterion as a measure) is directly related to coolant velocity and coolant channel aspect ratio. However, it is accompanied by a corresponding increase in pressure drop of the system. In addition, the coolant temperature rises as a function of coolant residence time and coolant-to-conductor ratio.<>

Keywords

channel flow; high-temperature superconductors; low-temperature techniques; superconducting magnets; Stekley criterion; coolant channel aspect ratio; coolant residence time; coolant velocity; coolant-to-conductor ratio; cryostable magnet; high current density; high-temperature superconducting magnets; low stabilizer fraction; microchannels; subcooled flow; Coolants; Current density; Fluid flow; Magnetic analysis; Microchannel; Nitrogen; Stability criteria; Superconducting magnets; Temperature; Velocity measurement;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233698

Filename

233698