NMR magnet system with superconducting coil in a helium bath

US5220800A · kind A · utility

Assignees

• Bruker Analytische Messtechnik GmbH · DE
• Kernforschungszentrum Karlsruhe GmbH · DE

Inventors

• Wolfgang Muller · Königsfeld, DE
• Gerhard Roth · Rheinstetten, DE
• Wolfgang Stautner · Abingdon, GB
• Peter Turowski · Leopoldshafen, DE
• Wolfgang Lehmann · Bempflingen, DE
• Franz Graf · Burghausen, DE

Key dates

• Filing date: Dec 9, 1991
• Grant date: Jun 22, 1993
• Expiry date: Dec 9, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S505/892
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

In an NMR magnet system for generating a highly homogeneous magnetic field of high field strength, with at least one superconducting magnet coil which is arranged in a first chamber of a cryostat in supercooled liquid helium at a temperature of less than 4.2K, with the cryostat having at least one further chamber containing liquid helium that is essentially at atmospheric pressure with a temperature of approximately 4.2K, the first chamber is connected to the further chamber in such a way that the supercooled liquid helium located in the first chamber is also essentially at atmospheric pressure. A refrigerator with which the liquid helium can be cooled to a temperature T<<4.2K, especially to T.apprxeq.1.8-2.3K, is provided in the first chamber.