title: A 0.6 T/650 mm RT Bore Solid Nitrogen Cooled MgB2Demonstration Coil for MRI-a Status Report.
abstract: Aiming to demonstrate feasibility and practicality of a low cost superconducting MRI magnet system targeted for use in small hospitals, rural communities and underdeveloped countries, MIT-Francis Bitter Magnet Laboratory has developed a 0.6 T/650 mm room temperature bore demonstration coil wound with multifilament MgB2conductor and cooled via an innovative cryogenic design/operation. The coil is to be maintained cold by solid nitrogen kept in the solid state by a cryocooler. In the event of a power failure the cryocooler is automatically thermally decoupled from the system. In this paper we present details of the MgB2 conductor, winding process, and preliminary theoretical analysis of the current-carrying performance of the conductively cooled coils in zero background field and over the 10-30 K temperature range.
authors.affiliation: MIT Francis Bitter Magnet Laboratory, Cambridge, MA 02139 USA.
authors.forename: Juan
authors.initials: J
authors.lastname: Bascuñán
authors.affiliation: Division of Material Science & Engineering, Korea University, Seoul 136-713, Korea.
authors.forename: Haigunan
authors.initials: H
authors.lastname: Lee
authors.affiliation: MIT Francis Bitter Magnet Laboratory, Cambridge, MA 02139 USA.
authors.forename: Emmanuel S
authors.initials: ES
authors.lastname: Bobrov
authors.affiliation: MIT Francis Bitter Magnet Laboratory, Cambridge, MA 02139 USA.
authors.forename: Seungyong
authors.initials: S
authors.lastname: Hahn
authors.affiliation: MIT Francis Bitter Magnet Laboratory, Cambridge, MA 02139 USA.
authors.forename: Yukikazu
authors.initials: Y
authors.lastname: Iwasa
authors.affiliation: Hyper Tech Research, Inc., Columbus, OH 43212 USA.
authors.forename: Mike
authors.initials: M
authors.lastname: Tomsic
authors.affiliation: Hyper Tech Research, Inc., Columbus, OH 43212 USA.
authors.forename: Matt
authors.initials: M
authors.lastname: Rindfleisch
keywords: Conduction cooled; MRI; MgB2; solenoids