TEMPERATURE-MEASUREMENT OF SAMPLES FOR STUDY OF OUTGASSING BY MEANS OF A PENDULUM

The method of quick immersion of the sample into a hot zone was chosen for the study of outgassing of metal samples; an additional temperatu re rise of the sample was achieved by electron bombardment. As the tem perature measurement was by an optical pyrometer, large errors occurre d, which were caused by high reflectivity of the samples and use of a thermocouple was difficult when using electron bombardment. For this r eason the temperature of the sample was determined by an additional me asurement from the thermal expansion of the sample. The sample was mou nted as a part of a pendulum suspension and the temperature was determ ined from the changes of the oscillation periods. The experimental arr angement, theory and examples of results obtained by this method are d escribed in the following paper.