Application of high-temperature superconducting wires to magnetostrictive transducers for underwater sonar

Author

Voccio, J.P. ; Joshi, C.H. ; Lindberg, J.F.

Author_Institution

American Superconducting Corp., Westborough, MA, USA

Volume

30

Issue

4

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

1693

Lastpage

1698

Abstract

Recently discovered cryogenic magnetostrictive materials show maximum strains greater than any room temperature materials. These cryogenic magnetostrictors can be combined with high-temperature superconducting (HTS) coils to create a sonar transducer with high efficiency and high acoustic-power density. A prototype low-frequency (<1000 Hz) magnetostrictive transducer is described. This transducer uses a terbium-dysprosium (TbDy) magnetostrictor rod with HTS coils cooled to 50-80 K using a single-stage cryocooler. The device is designed for operation at water depths of 100 m and is believed to be the first fully integrated prototype demonstration of HTS

Keywords

acoustic transducers; high-temperature superconductors; magnetostrictive devices; sonar; superconducting magnets; wires (electric); 100 m; 1000 Hz; 50 to 80 K; TbDy; TbDy magnetostrictor rod; cryogenic magnetostrictive materials; high-temperature superconducting coils; high-temperature superconducting wires; magnetostrictive transducers; single-stage cryocooler; underwater sonar; Acoustic transducers; Cryogenics; High temperature superconductors; Magnetic materials; Magnetostriction; Prototypes; Superconducting coils; Superconducting filaments and wires; Superconducting magnets; Superconducting materials;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.305582

Filename

305582