Bruker Biospin Ag

Schimun Denoth

Michael Fey

Thomas Speck

Dirk Wilhelm

Charles Massin

Silvia Buttazzoni

Frank Vincent

In a coil arrangement for nuclear magnetic resonance comprising a main coil (), a shielding coil (), and at least one correction coil (), the function of which consists in forming a magnetic field gradient with eddy current properties which are as good as possible, the main coil () and the shielding coil () are electrically connected in series with the correction coil (). The deviations of the residual field from the desired design generated by production tolerances are thereby modified by the correction coil in such a fashion that the long-lasting eddy currents are suppressed. This either reduces the waiting time that must lapse after a gradient pulse before a predetermined field homogeneity is achieved or e.g. the deviations from the desired field are minimized in imaging applications.

Gradient coil with correction windings and method for production thereof

A nuclear magnetic resonance (NMR) probe component, comprising a microfabricated planar gradient chip (), with a substrate thickness d&#x2266;3 mm, carrying three micromachined planar partial gradient coils (-) on each of its two outer surfaces (), wherein the partial gradient coils (-) of the gradient chip () form a three-dimensional gradient system, wherein the gradient chip () has a central guiding and positioning slot () between the two outer surfaces (). The probe component also has a sample chip () for carrying an NMR sample at a sample location, with a microfabricated planar RF coil (), wherein the sample chip () fits exactly in the guiding and positioning slot () such that in a measurement position, the sample location coincides with the center of the gradient system. The NMR probe component has improved spatial resolution and allows good alignment of the RF coil and the gradient system.

NMR probe component with a gradient chip with a slot for insertion of a sample chip

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Zurich, Switzerland

Schimun Denoth