An X-Ray High Temperature Camera

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Abstract
A powder camera is described which was designed for the purpose of taking x‐ray photographs through an x‐ray diffraction angle of 0°—45° in a cylindrical camera of 57.3‐mm radius, to temperatures greater than 300°C. The essential features are (1) a concentric heater extending above and below the sample to minimize sharp temperature gradients; (2) easy access to the oven coils if adjustment is necessary; (3) an iron‐constantan thermocouple of small dimensions which allows one to take temperatures close to the sample; (4) a water‐cooled jacket surrounding the oven to avoid heating the film. Rotation of the sample at 1 r.p.m. is provided for. Calibration of the thermocouple and the type of capillaries are described for high temperatures.

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