Magnet arrangement and method for providing a magnetic field in a sensitive volume

US8148988B2 · kind B2 · utility

Assignee

• RWTH Aachen · DE

Inventors

• Bernhard Blumich · Simmerath, DE
• Ernesto Pablo Danieli · Aachen, DE
• Federico Casanova · Aachen, DE
• Juan Francisco Perlo · Aachen, DE

Key dates

• Filing date: Jul 6, 2009
• Grant date: Apr 3, 2012
• Expiry date: Apr 20, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/3873
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A magnet arrangement includes (a) a first and a second head ring magnet each having a substantially circular geometry with respect to a center axis and (b) a central ring magnet having a substantially circular geometry with respect to a center axis. The central ring magnet is disposed between the first and second head ring magnet in direction of the center axis. At least one of the magnets includes a first number of first magnets having at least one trapezoidal cross section and a second number of second magnets having at least one rectangular cross section. The second magnets are disposed in between the first magnets in circumferential direction. With this geometrical arrangement, magnets having a trapezoidal cross section include a guidance for a magnet having a rectangular cross section allowing the movements in radial direction of these last magnets.