High-Temperature Superconducting Coils for Magnetic Damping of Convection Currents in Crystal Growth Equipment

Period of Performance: 01/01/1995 - 12/31/1995

$599K

Phase 2 SBIR

Recipient Firm

Intermagnetics General Corp
450 Old Niskayuna Rd P.o. Box, 461
Latham, NY 12110
Principal Investigator

Abstract

It is proposed to develop and utilize coils made of high temperature superconducting (HTS) conductor for the purpose of providing magnetic damping for ground- and space-based directional solidification and crystal growth equipment. This innovative use of HTS coils to magnetic damping technology will enable lightweight, variable field magnets to be produced to control the buoyancy- induced convective mixing of the liquid phase which perturbs equilibrium conditions at the solid-liquid interface. The Phase I effort will fabricate a subsize (3" bore) magnet to demonstrate the concept of using HTS coils in this application and lays the foundation for a full size (8" bore) and field (2 kgauss) coil to be fabricated in Phase II.