Patent ID: 8847595
Filing Date: 2014-09-30
Classification: G01R

Abstract:
1. A temperature control device for an NMR sample tube, the device comprising: multiple interleaved, concentric flow channels for temperature control fluid, said flow channels extending coaxially and surrounding a cylindrical interior space for holding the NMR sample tube, wherein said temperature control device is closed toward said interior space in a first axial end region and open to said interior space in a second axial end region opposite to said first axial end region, the NMR sample tube being inserted into said interior space at said second axial end region, wherein, in a counter flow region, adjacent flow channels are interconnected through a counter flow fluid passage at one axial end in such a way that a direction of fluid flow in flow channels of said counter flow region is reversed with respect to a corresponding adjacent flow channel in said counter flow region, an outermost flow channel of said counter flow region having a first fluid inlet at one axial end and an innermost flow channel of said counter flow region having a first fluid outlet to said interior space proximate to said closed, first axial end region, wherein at least one of said flow channels of the temperature control device has a second fluid outlet at one axial end, through which at least part of the temperature-controlling fluid flow of the temperature control device can escape from the temperature control device without passing through all flow channels of said counter flow region, wherein an axial wall that separates an outermost flow channel of said counter flow region from a next outermost flow channel, exhibits a thermal transmittance U