An adiabatic calorimeter for the range 10 to 360 °K

Abstract

A low te mperature adiabatic calorimeter and cryostat assembl y is d esc ribed for meas-Ul'ing heat capacit ies in t he te mperature range 10 to 360 oK. A combination of D ewar a nd tank system is used as refrigerant co ntainers. Th e te mperature of t he adia batic shi eld is a utomatically co ntrolled to within a millidegree of t hat of the c" lorimeter vessel. This a ppa rat us offe rs hLCiliti es for rapid cooling to a bout 50 oK and long term a diabatic control for conditionin g of a sa mple and, t hus, is esp ecially sui table for m eas urements on glass, where long eq uilibration t ime is so meti mes involved.