Spinning apparatus for nmr spectrometers

Abstract

This spinning apparatus for nuclear magnetic resonance (NMR) spectrometers is readily mountable and demountable in the spectrometer and is arranged for ease in loading samples to be spun. The apparatus is also arranged for ease in aligning the sample in the magnetic field for obtaining optimum results. At the same time, the apparatus is simple, and inexpensive in construction. Basically, the spinning apparatus comprises a stator assembly in the form of a nonmagnetic cylindrical body member having a conical bore arranged at an angle to the longitudinal axis of the body member lying between 45.degree. and 90.degree. and located in approximately one-half of the body member. A rotor assembly comprising a conical head portion and a cylindrical tail portion fits into the conical bore for spinning the sample which is loaded into the cylindrical portion. An elongated bore in the body member is arranged for supplying gas to a manifold arranged in the body member for application through jets into the conical bore and against the conical portion of the rotor assembly. The rotor assembly rides on a gas bearing for efficient, wear free and less critical operation and preferably has fluting for better drive. The conical head portion preferably is cut with a compound angle for easier starting and for importing greater stability in spinning.