Title :
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
fDate :
7/1/1994 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
