A cryostat for crystal growth at subambient temperatures

Abstract
A simple device for crystal growth is described. It consists principally of a cryostat cooled by a pulsed stream of liquid nitrogen. The cryostat has been operated between 0 and -150 degrees C. The temperature can be maintained constant to within +or-1 degC and the liquid nitrogen consumption is of the order of 1 1h-1 at -100 degrees C.

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