Bruker Biospin Gmbh

Michael Dumm

Patrick Wikus

Volker Niemann

Wolfgang Frantz

Michael Wagenknecht

Steffen Bonn

A superconducting magnet coil arrangement has a high-temperature superconductor (HTS) coil section () in the form of a solenoid that is wound with an HTS tape conductor, and also has a field-shaping device comprising at least two field-shaping elements (). At least one respective field-shaping element is arranged adjoining each of the two axial ends of the HTS coil section, the field-shaping elements being configured in such a way that they reduce the field angle of the magnetic field generated by the magnet coil arrangement with respect to the axial direction in the region of the HTS coil section by at least 1.5&#xb0;.

Magnet arrangement with field-shaping element for reducing the radial field component in the region of an HTS section

An arrangement for setting the spatial profile of a magnetic field in a working volume of a main field magnet (), in particular a superconducting main field magnet, of a magnetic resonance installation. The main field magnet is arranged in a cryostat () and the spatial profile is set by a passive shim apparatus () with magnetic field forming elements which are arranged within the cryostat during operation and which have cryogenic temperatures. The magnetic resonance installation contains a room temperature tube (), in which the sample volume is situated during operation. The passive shim apparatus is introduced into or removed from the cold region of the cryostat via a vacuum lock (), without needing to ventilate the cold region of the cryostat. This provides a relatively simple, cost effective, and time-efficient method to carry out a stable field homogenization using a passive shim apparatus.

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Zurich, Switzerland

Michael Dumm