WEOPMA02
DLS, Oxfordshire, United Kingdom
Oxford University, Physics Department, Oxford, Oxon, United Kingdom
Measurement of the temperature of cryogenically cooled samples in a vacuum environment is a challenging task that requires specialist technical solutions. A new technique enabling non-contact monitoring of temperature has been developed for the I23 beamline. The temperature is determined by measuring the luminescence decay constant of a Bi4Ge3O12 scintillation sensor. One of the main advantages of the non-contact thermometry system is elimination of any connections between the sensor and the readout system that makes it fully compatible with the vacuum environment and necessity of swift replacement and manipulation of the samples. The technique was applied to quantify the thermal performance of different sample mounts that has been used for MX experiment at I23 beamline. It has been shown that the magnitude of the temperature rise across the sample mounts varies in wide range from 60 to 110 K while the temperature of goniometer was 40 K. The obtained results not only explain previous empirical finding but also demonstrated how this technique can aid studies of the complex relationships between various parameters influencing the heat conductance and temperature of the samples.
