NEW TEMPERATURE CONTROL APPARATUS FOR X-RAY EXPERIMENTS

A temperature control apparatus for X-ray experiments for organic compounds was newly designed. It is a gas furnace system equipped with a proportional integrated differential (PID) controller. In this study, a position sensitive proportional counter (PSPC) was used as a detector in order to make quick measurements. Using this apparatus, the long spacing of 1-octadecanol was measured by the small angle X-ray scattering (SAXS) method. The long spacings of 1-octadecanol in the high temperature phase and the low temperature stable one were 48.7 and 41.7 angstrom, respectively. The result obtained was consistent with that reported. It was confirmed that the apparatus designed here operated properly for the temperature control of organic compounds in X-ray experiments and was useful for the structural study on the phase transition of organic samples.