Bruker Biospin Ag

Quad Systems Ag

Klemens Kessler

Philippe Stauffenegger

Daniel Marek

Oskar Schett

Daniel Guy Baumann

Marc A Schnell

Cengiz Cetrefli

Bernhard Felber

Marco Tomaselli

Sven Radke

An NMR (nuclear magnetic resonance) apparatus has a magnet system disposed in a cryostat (), the cryostat having at least one nitrogen tank () for receiving liquid nitrogen () and a room temperature bore () for receiving an NMR probehead (), wherein part(s) of the probehead or the overall probehead can be cooled to cryogenic temperatures by supplying liquid nitrogen () via a supply line (). The nitrogen tank () of the cryostat () is connected to the NMR probehead () by means of a supply line () in such a fashion that liquid nitrogen () is removed from the nitrogen tank () and guided to the NMR probehead (). The overall apparatus is therefore more compact, the operating comfort of the apparatus is increased, and the costs for acquisition, operation and maintenance are considerably reduced compared to previous comparable devices.

Cryogenic probehead cooler in a nuclear magnetic resonance apparatus

An NMR measuring system with an NMR probehead has at least one cooling device () generating a vibration spectrum of individual selective frequencies. The cooling device is mechanically connected to a vibration absorber () having an oscillating mass element (), whose resonance frequency is adjusted to the vibration frequency of the cooling device and/or to one of its harmonics. The cooling device has a cooling head which is thermally connected to an NMR resonator of the probehead via a flexible mechanical element. A vacuum housing of the probehead is designed in two parts which are mechanically connected via at least one damping element (-). The lower part and the upper part of the vacuum housing are additionally mechanically flexibly connected to each other in a vacuum-tight fashion via a corrugated bellows (). The system minimizes sidebands in NMR spectra.

Compact cryogenic NMR sensor with integrated active cooling device

Growing community of inventors

Oberneunforn, Switzerland

Klemens Kessler