Speaker
Thomas Funke
(Technische Universitaet Dresden)
Description
New MLI measurements at the TU Dresden flow type calorimeter have been carried out. Specimens of 10 and 20 layer double side aluminized polyester film were tested.
A cylindrical cold surface of 0.9 m²is held at the desired cold boundary temperature between approximately 30 K and 300 K. The heat transfer through the MLI is measured by recording the mass flow as well as the inlet and the outlet temperature of the cooling fluid. Measurements at varied cold boundary temperatures have been performed. Moreover the effect of an additional vacuum degradation – as it might occur by decreasing getter material performance in real systems at elevated temperatures – is studied by a controlled inlet of nitrogen gas. Thus the vacuum pressure was varied over a range of 10-7 mbar to 10-2 mbar. Different cold boundary temperatures between 35 K and 110 K were investigated. Test results of the bare test cylinder as well as 10 and 20 layer MLI are presented.
Author
Thomas Funke
(Technische Universitaet Dresden)
Co-author
Dr
Christoph Haberstroh
(Technische Universitaet Dresden)
