TERENZI, LUCALUCATERENZIMORGANTE, GIANLUCAGIANLUCAMORGANTELapolla, MarcoMarcoLapollaVALENZIANO, LucaLucaVALENZIANOCUTTAIA, FRANCESCOFRANCESCOCUTTAIAMENNELLA, ANIELLOANIELLOMENNELLA2023-02-152023-02-152004http://hdl.handle.net/20.500.12386/33478During the testing phase of the QM and FM LFI instrument, the integrated radiometer chain assemblies (RCAs) will be tested in a dedicated cryo facility. The input signal will be provided by an eccosorb load placed in front of the LFI feed horns that simulates the sky signal; the thermal stability of this sky load needs to be of the same order of the stability that is expected in flight for the primary and secondary mirrors, in order not to introduce uncertainties in the test results that may be difficult to interpret. In this document we derive the thermal stability requirements at the interface between the ECCOSORB sky load and its support starting from the signal stability requirements and considering the current knowledge concerning thermal conduction properties of the ECCOSORB at 20 K.ELETTRONICOenResearch reportFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_17 Instrumentation – telescopes, detectors and techniques