Apparatus for annealing of electron microscope specimens under controlled atmospheres

SUMMARY A detailed description is given of an annealing system in which transmission electron microscope specimens can be heat‐treated for known effective annealing times at accurately known constant temperatures. The apparatus includes facilities for annealing under corrosive atmospheres (such as chlorine) or vapours (such as bromine) at known pressures, and works in conjunction with an oil bath of which the temperature can be controlled to ±0.01°C. The thermal response of the specimen chamber at different annealing temperatures was determined by cine techniques. Typical results obtained with the system are presented.