CUTTAIA, FRANCESCOFRANCESCOCUTTAIADE ROSA, Adriano GiuseppeAdriano GiuseppeDE ROSA2024-06-242024-06-242008http://hdl.handle.net/20.500.12386/35214The design of the new sky load simulator used in the CSl cryo facility for FM test campaign set very tight requirements on the accuracy of positioning w..r.t. the FPU (LFI and HFI feeds). A thermo mechanical contraction of structures supporting the SKL is expected when going in cold conditions ( optical shield at 4 K, environment between 20 K and 60 K), causing a wrong displacement w.r.t. the nominal position. A thermo mechanical CAD model was prepared by AMOS , to evaluate by FEM simulations the expected displacement. It can be accounted in warm conditions to correct in advance the SKL position before going to cryo. A test was prepared to verify the expected displacement during the Planck Blank test ( March 2008) using simple devices, described in (RD 7) . The test was successfully performed in CSL and here follow the main results.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