Bruker Biospin Gmbh

Bruker Biospin Ag

Bruker Switzerland Ag

Alia Hassan

Nicolas Freytag

Daniel Marek

David Osen

Armin Purea

Benno Knott

Fabian Kuehler

Jevgeni Guidoulianov

Florian Helbing

Stephan Graf

Peter Scheuzger

Fabian Kühler

A method for operating an NMR probehead () with an MAS stator () receiving a circular-cylindrical hollow MAS rotor () with an outer jacket. The MAS rotor is mounted on pressurized gas in a measuring position within the MAS stator via a gas supply device with a bearing nozzle (') and rotates about the cylinder axis of the MAS rotor at a rotation frequency f&#x2265;30 kHz. During a measurement, a temperature control gas is blown by a temperature control nozzle () onto the outer jacket of the rotor at an angle &#x3b1;&#x3c;90&#xb0; with respect to the longitudinal axis of the cylinder-symmetrical rotor. The flow speed of the temperature control gas corresponds in the nozzle cross section to at least half the circumferential speed of the outer jacket of the rotating rotor and to at most the speed of sound in the temperature control gas.

Temperature control of an NMR-MAS rotor

An HF coil assembly for generating independent alternating magnetic fields in an examination volume of a magnetic resonance apparatus is presented, the HF coil assembly comprising a first coil pair of saddle coils and a second coil pair of saddle coils, each saddle coil having longitudinal conductor elements and curved conductor elements arranged along a common lateral surface of a circular cylinder having a cylinder axis. Each coil pair comprises curved conductor elements and longitudinal conductor elements which are interconnected at a high frequency. The saddle coils also have diagonal conductor elements and/or bridge elements that connect the longitudinal and curved conductor elements. The coil pairs are opposite to each other relative to the cylinder axis.

HF coil assembly

A nuclear magnetic resonance probe head comprising at least two orthogonal coil/resonator configurations Aand Ahaving different resonance frequencies, wherein at feast one of the coil/resonator configurations Ahas two saddle-shaped coils Sand S, wherein each coil has a window about which N windings are disposed which are connected in series, wherein N&#x2267;. Each coil Sand Sis formed mirror-symmetrically relative to a central plane of the respective coil, which is perpendicular to the window of the respective coil, wherein the central planes of the coils Sand Sare identical to minimize the electromagnetic coupling between the two coil/resonator configurations Aand Aat the resonance frequency of A. The NMR probe head reduces coupling between the two coil/resonator configurations.

Electrically symmetric NMR coils with a plurality of windings connected in series

Growing community of inventors

Binz, Switzerland

Alia Hassan