Thermal Mechanical architecture for the SAFARI focal plane assembly

摘要

The very challenging SPICA/SAFARI scientific goals imply to cool most detector solutions below 100 mK. This implies to find reliable solutions providing not only very efficient thermal insulation between the different temperature stages, but also keeping the stray light level well below the foreseen astronomical background (20 aW/pixel !). The main constraint is the available power budget (l-2μW); this value includes optical, electrical and parasitic power loads.rnThis poster describes how the Herschel/PACS Bolometer Focal Plane thermo-mechanical design can be adapted to the new thermal and optical needs, while keeping a sufficiently stiff structure to withstand launch vibrations.rnWe give the first results on the thermal and mechanical behaviour obtained with a prototype.