Cryostat having a magnet coil system, which comprises an under-cooled LTS section and an HTS section arranged in a separate helium tank

US8255022B2 · kind B2 · utility

Assignees

• Bruker Biospin GmbH · DE
• Forschungszentrum Karlsruhe GmbH · DE

Inventors

• Theo Schneider · Blankenloch, DE
• Gerhard Roth · Rheinstetten, DE
• Arne Kasten · Karlsruhe, DE

Key dates

• Filing date: Mar 7, 2007
• Grant date: Aug 28, 2012
• Expiry date: Oct 30, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01F6/04
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A cryostat (1) with a magnet coil system including superconductors for the production of a magnet field B0 in a measuring volume (3) has a plurality of radially nested solenoid-shaped coil sections (4, 5, 6) which are electrically connected in series, at least one of which being an LTS section (5, 6) with a conventional low temperature superconductor (LTS) and at least one of which being an HTS section (4) including a high temperature superconductor (HTS), wherein the LTS section (5, 6) is located in a first helium tank (9) of the cryostat (1) along with liquid helium at a helium temperature TL<4 K. The apparatus is characterized in that the HTS section (4) is disposed radially within the LTS section (5, 6) in a separate helium tank (19) of the cryostat (1) having normal liquid helium and is separated from the LTS section (5, 6) by means of at least one wall disposed between the two helium tanks. An HTS coil section can be maintained in the cryostat in accordance with the invention over a long period of time and in a reliable fashion.