Multiple Target Nuclear Magnetic Resonance Cryostat

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Abstract
A cryostat is described for accurately controlling the temperatures to 0.1°K of several solid specimens during nuclear magnetic resonance experiments in the temperature range from 10 to 400°K. The specimen targets are passed through the rf coil of the spectrometer in succession. This procedure enables more certain comparisons to be made of line shapes for different samples. The method is of particular advantage when small changes are to be observed or when it is of importance to have the individual specimens undergo thermal treatments as similar as possible. Also, since several samples can be studied in succession at any desired temperature a considerable saving of time is achieved. The cryostat is designed so that solid or liquid specimens can be utilized with a minimum of disturbance to existing adjustments.

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