Thermal cycling test

According to ECSS-Q-70-04A: "A thermal cycling test for the screening of space materials and processes".

Space vehicles are exposed to continuous temperature changes due to changing sun irridiation (e.g. spin, earth orbit). For certain satellite parts temperature cycles between approx. -160 °C and +180 °C have been calculated.The thermal cycling test is used for the screening of materials and processes intended for use in the fabrication of spacecraft and associated equipment.The test will determine the ability of these or other articles to withstand extreme changes of ambient temperature under vacuum.On demand, on-line acquisition of several propoerties, e.g. multiple temperatures, resistancechannels can be performed. Post examination (SEM-, LO-microscopy, NDT) and testing (e.g. mechanical tests, electrical tests) can be carried out.

The Space Materials Testhouse is also accredited for determination of outgassing properties acc. to ECSS-Q-70-02A. "A thermal vacuum test for the screening of space materials" (See Thermal Vacuum test I) which requires a regularly re-approval by ESA. Last audit and re-approval was done January 2002. Detailed investigation of outgassing kinetics and species may be done using Thermal Vacuum Test II.

Sketch of the inside volume of the chamber

The inside volume of the chamber is limited by the hexagonal base plate of the heat exchanger (Diameter approximately 32 cm) with a height of 26 cm. However, the cooling and heating of the samples are limited to the base plate of the heat exchanger under vacuum (Cupper plates). The upper heating plate is adjustable in height.

Thermal cycling facility Characteristics