Experience with overcooling and refilling of large superconducting magnets

Abstract

Cooling process of big superconducting magnets from temperature of surrounding to the critical temperature is a verycomplicated process from economical as well as from technical view. In case when cryostat containing experimental device overcoolitself from normal temperature directly with liquid helium the consumption would be considerably higher than in case that we use liquidnitrogen for first overcool. Thus whole process of overcooling would be considerably nonprofitable. The article describes experiencewith overflowing of superconducting magnets installed in laboratory at the Technical University in Kosice, where the research projectfor the electric energy in the magnetic field storage takes place.

Keywords

• Magnetic resonance imaging
• Uninterruptible power supply
• Superconducting magnetic energy storage
• superconducting magnet
• Liquid nitrogen
• Liquid helium